Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition and Proposed Rule To Remove the Morelet's Crocodile From the Federal List of Endangered and Threatened Wildlife, 23650-23683 [2011-9836]
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Federal Register / Vol. 76, No. 81 / Wednesday, April 27, 2011 / Proposed Rules
DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS–R9–ES–2010–0030;
92210–1113–0000–C6]
RIN 1018–AV22
Endangered and Threatened Wildlife
and Plants; 12-Month Finding on a
Petition and Proposed Rule To
Remove the Morelet’s Crocodile From
the Federal List of Endangered and
Threatened Wildlife
Fish and Wildlife Service,
Interior.
ACTION: Proposed rule.
AGENCY:
Under the authority of the
Endangered Species Act of 1973, as
amended (Act), we, the U.S. Fish and
Wildlife Service (Service), announce a
12-month finding on a petition and a
proposed rule to remove the Morelet’s
crocodile (Crocodylus moreletii)
throughout its range from the Federal
List of Endangered and Threatened
Wildlife due to recovery. This action is
based on a thorough review of the best
available scientific and commercial
data, including new information that
became available after we received the
petition, which indicates that the
species’ status had improved to the
point that the Morelet’s crocodile is not
likely to become threatened within the
foreseeable future throughout all or a
significant portion of its range. If this
proposed rule is finalized, the Morelet’s
crocodile will remain protected under
the provisions of the Convention on
International Trade in Endangered
Species of Wild Fauna and Flora. We
are seeking information, data, and
comments from the public on this
proposed rule.
DATES: To ensure that we are able to
consider your comments on this
proposed rule, they must be received or
postmarked on or before June 27, 2011.
We must receive requests for public
hearings, in writing, at the address
shown in the FOR FURTHER INFORMATION
CONTACT section below by June 13, 2011.
ADDRESSES: You may submit comments
by one of the following methods:
• Federal eRulemaking Portal: https://
www.regulations.gov. Search for docket
number FWS–R9–ES–2010–0030 and
then follow the instructions for
submitting comments.
• U.S. mail or hand-delivery: Public
Comments Processing, Attn: FWS–R9–
ES–2010–0030; Division of Policy and
Directives Management; U.S. Fish and
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SUMMARY:
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Wildlife Service; 4401 N. Fairfax Drive,
Suite 222; Arlington, VA 22203.
We will not accept comments by email or fax. We will post all comments
on https://www.regulations.gov. This
generally means that we will post any
personal information you provide us
(see the Public Comments section below
for more information).
FOR FURTHER INFORMATION CONTACT:
Janine Van Norman, Chief, Branch of
Foreign Species, Endangered Species
Program, U.S. Fish and Wildlife Service,
4401 North Fairfax Drive, Room 420,
Arlington, VA 22203, U.S.A.; telephone
703–358–2171; facsimile 703–358–1735.
Individuals who are hearing-impaired or
speech-impaired may call the Federal
Information Relay Service at 800–877–
8339 for TTY assistance 24 hours a day,
7 days a week.
SUPPLEMENTARY INFORMATION:
Public Comments
Any final action resulting from this
proposed rule will be based on the best
scientific and commercial data available
and be as accurate and effective as
possible. Therefore, we request
comments or information from other
concerned government agencies, the
scientific community, industry, or other
interested parties concerning this
proposed rule. The comments that will
be most useful and likely to influence
our decisions are those supported by
data or peer-reviewed studies and those
that include citations to, and analyses
of, applicable laws and regulations.
Please make your comments as specific
as possible and explain the basis for
them. In addition, please include
sufficient information with your
comments to allow us to authenticate
any scientific or commercial data you
reference or provide. In particular, we
seek comments concerning the
following:
(1) New biological, trade, or other
relevant information and data
concerning any threat (or lack thereof)
to the Morelet’s crocodile.
(2) New information and data on
whether or not climate change is a
threat to the Morelet’s crocodile, what
regional climate change models are
available, and whether they are reliable
and credible to use as step-down models
for assessing the effect of climate change
on the species and its habitat.
(3) The location of any additional
populations of Morelet’s crocodile.
(4) New information and data
concerning the range, distribution, and
population size and population trends
of the Morelet’s crocodile.
(5) New information and data on the
current or planned activities within the
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geographic range of the Morelet’s
crocodile that may affect or benefit the
species.
(6) New information and data
concerning captive breeding operations
in Mexico, Belize, and Guatemala.
(7) New information and data on the
Morelet’s crocodile in Guatemala that
would enhance our analysis of whether
this population qualifies as a Distinct
Population Segment under the Act (16
U.S.C. 1531 et seq.), and whether this
population warrants continued
protection under the Act.
(8) Information and data concerning
the status and results of monitoring
actions for the Morelet’s crocodile,
including those implemented under the
Convention on International Trade in
Endangered Species of Wild Fauna and
Flora (CITES), the Belize-GuatemalaMexico Tri-national Strategy for the
Conservation and Sustainable Use of
Morelet’s Crocodile, and the Belizean
monitoring plan that are discussed
under the Post-Delisting Monitoring
section below.
(9) Information pertaining to Belize’s
efforts to fully enact national legislation
and/or their efforts to ensure Belize’s
compliance with CITES.
Please note that submissions merely
stating support for or opposition to the
action under consideration without
providing supporting information,
although noted, will not be considered
in making a determination, as section
4(b)(1)(A) of the Endangered Species
Act of 1973, as amended (Act; 16 U.S.C.
1531 et seq.) directs that a
determination as to whether any species
is an endangered or threatened species
must be made ‘‘solely on the basis of the
best scientific and commercial data
available.’’
Prior to issuing a final rule on this
proposed action, we will take into
consideration all comments and any
additional information we receive. Such
information may lead to a final rule that
differs from this proposal. All comments
and recommendations, including names
and addresses, will become part of the
administrative record.
You may submit your comments and
materials concerning this proposed rule
by one of the methods listed in the
ADDRESSES section. We will not
consider comments sent by e-mail or fax
or to an address not listed in the
ADDRESSES section. If you submit a
comment via https://
www.regulations.gov, your entire
comment—including any personal
identifying information—will be posted
on the Web site. Please note that
comments posted to this Web site are
not immediately viewable. When you
submit a comment, the system receives
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it immediately. However, the comment
will not be publicly viewable until we
post it, which might not occur until
several days after submission.
If you mail or hand-deliver a
hardcopy comment that includes
personal identifying information, you
may request at the top of your document
that we withhold this information from
public review. However, we cannot
guarantee that we will be able to do so.
To ensure that the electronic docket for
this rulemaking is complete and all
comments we receive are publicly
available, we will post all hardcopy
submissions on https://
www.regulations.gov.
In addition, comments and materials
we receive, as well as supporting
documentation used in preparing this
proposed rule, will be available for
public inspection in two ways:
(1) You can view them on https://
www.regulations.gov. In the Enter
Keyword or ID box, enter FWS–R9–ES–
2010–0030, which is the docket number
for this rulemaking.
(2) You can make an appointment,
during normal business hours, to view
the comments and materials in person at
the U.S. Fish and Wildlife Service’s
Endangered Species Program located in
our Headquarters office (see FOR
FURTHER INFORMATION CONTACT).
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Public Availability of Comments
Before including your address, phone
number, e-mail address, or other
personal identifying information in your
comment, you should be aware that
your entire comment—including your
personal identifying information—might
be made publicly available at any time.
While you can ask us in your comment
to withhold your personal identifying
information from public review, we
cannot guarantee that we will be able to
do so.
Public Hearing
Section 4(b)(5)(E) of the Act provides
for one or more public hearings on this
proposed rule, if requested. We must
receive requests for public hearings, in
writing, at the address shown in the FOR
FURTHER INFORMATION CONTACT section
by the date shown in the DATES section
of this document. We will schedule
public hearings on this proposal, if any
are requested, and announce the dates,
times, and places of those hearings, as
well as how to obtain reasonable
accommodations, in the Federal
Register at least 15 days before the first
hearing.
Background
Section 4(b)(3)(A) of the Act requires
the Service to make an initial finding as
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to whether a petition to list, delist, or
reclassify a species has presented
substantial information indicating that
the requested action may be warranted.
To the maximum extent practicable, the
finding shall be made within 90 days
following receipt of the petition and
published promptly in the Federal
Register. If the 90-day finding is
positive—that is, the petition has
presented substantial information
indicating that the requested action may
be warranted—section 4(b)(3)(A) of the
Act requires the Service to commence a
status review of the species if one has
not already been initiated under the
Service’s internal candidate assessment
process. In addition, section 4(b)(3)(B)
of the Act requires the Service to make
a finding within 12 months following
receipt of the petition on whether the
requested action is warranted, not
warranted, or warranted but precluded
by higher-priority listing actions. That
finding is referred to as the ‘‘12-month
finding.’’
Previous Federal Actions
The Morelet’s crocodile was listed as
endangered throughout its entire range
under the predecessor of the Act via a
rule published in the Federal Register
on June 2, 1970 (35 FR 8491). Import
into, export from, or re-export from the
United States, as well as other
prohibitions, including movement in
the course of a commercial activity and
sale in interstate or foreign commerce,
of endangered species and their parts
and products, are prohibited under the
Act unless otherwise authorized.
Authorizations for endangered species
can only be made for scientific purposes
or to enhance the propagation or
survival of the species. On July 1, 1975,
the Morelet’s crocodile was listed in
Appendix I of CITES. These protections
were put in place because the species
had suffered substantial population
declines throughout its range due to
habitat destruction and overexploitation
through the commercial crocodilian
skin trade. CITES Appendix I includes
species that are ‘‘threatened with
extinction which are or may be affected
by trade.’’
On May 26, 2005, the Service received
a petition from the Government of
´
Mexico’s Comision Nacional para el
Conocimiento y Uso de la Biodiversidad
(CONABIO 2005) to remove the
Morelet’s crocodile from the List of
Endangered and Threatened Wildlife at
50 CFR 17.11.
Based on the information provided,
the Service’s 90-day finding on the
petition, which was published in the
Federal Register on June 28, 2006 (71
FR 36743), stated that the petition
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provided substantial information to
indicate that the requested action may
be warranted. In that finding, we
announced that we had initiated a status
review of the species as required under
section 4(b)(3)(A) of the Act, and that
we were seeking comments on the
petition, as well as information on the
status of the species, particularly in
Belize and Guatemala. The Service also
solicited comments or additional
information from counterparts in
Mexico, Belize and Guatemala.
This proposed rule to delist the
Morelet’s crocodile throughout its range
also constitutes our 12-month finding
that the petitioned action is warranted.
Species Information
Three species of crocodilians occur in
Mexico and Central America. The
Morelet’s crocodile and the American
crocodile (Crocodylus acutus) co-occur
in Mexico, Belize, and Guatemala
(Schmidt 1924, pp. 79 and 85; Stuart
1948, p. 45). While their ranges overlap,
the American crocodile has a much
larger range than the Morelet’s
crocodile, and is found in the United
States in the State of Florida, as well as
in the Caribbean, on Pacific and Atlantic
coasts of Central America and northern
South America in Venezuela, Colombia,
Ecuador, and northern Peru. A third
species, the common or spectacled
caiman (Caiman crocodilus) occurs in
Mexico and Guatemala, but is absent
from Belize. The distribution of the
common caiman also extends into
northern South America (Ross 1998, pp.
14–17; Thorbjarnarson 1992, pp. 82–85).
The Morelet’s crocodile was named after
a French naturalist, P.M.A. Morelet
(1809–1892), who discovered this
species in Mexico in 1850 (Britton 2008,
p. 1). The type locality of the species
was later restricted to ‘‘Guatemala, El
Peten, Laguna de Peten’’ when the
species was scientifically described. In
Mexico, the Morelet’s crocodile is
known as ‘‘lagarto’’ or ‘‘swamp
crocodile’’ (Rodriguez-Quivedo et al,
2008).
The Morelet’s crocodile is a
‘‘relatively small species’’ that usually
attains a maximum length of
approximately 9.8–11.5 ft (3–3.5 m
´
(Sanchez (2005, p. 4); Britton (2008, p.
1)), with most wild adults ranging in
length 6.6–8.2 ft (2–2.5 m). Hurley
(2005, p. 2), however, reported
specimens attaining 15.4 ft (4.7 m). Platt
and Rainwater (2005, p. 25) stated that
size estimates where shorter lengths
were documented were probably based
on populations that had been heavily
impacted by hunting and which now
contained few large adults. The
Morelet’s crocodile is distinguished
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from other crocodiles, particularly the
partially sympatric (having the same or
overlapping distribution) and somewhat
larger American crocodile, by the
number of dorsal scales in each
transverse row on its back, the number
and arrangement of nuchal scales
(located at the nape of the neck), and
irregular scales on the ventrolateral
(lower side) surface of the tail (Meerman
1994, p. 110; Navarro Serment 2004, pp.
55–56; Platt and Rainwater 2005, p. 27;
´
Hernandez Hurtado et al. 2006, p. 376;
Platt et al. 2008b, p. 294). The Morelet’s
crocodile has six nuchal scales of
similar size compared to other crocodile
species, which have either four nuchal
scales or four large nuchal scales and
two small ones (CITES 2010a, p.11).
Unlike most other species of
crocodilians, the Morelet’s crocodile
lacks bony plates beneath the skin
(osteoderms), making their skin more
valuable as leather (Hurley 2005, p. 9).
Adults have a yellowish-olive black
skin, usually showing big black spots at
the tail and at the back area, which in
some adults can be entirely black. The
ventral (underside) area is light in color,
with a creamy yellowish tone. A thick
and soft skin has made the Morelet’s
crocodile desirable for
commercialization (CITES 2010a, p. 3).
Opportunistic carnivores, juvenile
Morelet’s crocodiles feed on small
invertebrates, especially insects and
arachnids, while subadults eat a more
diverse diet including mollusks,
crustaceans, fish, amphibians, and small
reptiles. Adult crocodiles consume
reptiles, birds, and mammals (Platt et al.
´
2002, p. 82; Sanchez 2005, p. 7; Platt et
al. 2006, pp. 283–285; CITES 2008, p. 9,
CITES 2010a, p. 3). This species is also
known to exhibit necrophagy
(consumption of dead animal carcasses
over an extended period (several days))
and interspecific kleptoparasitism
(stealing of food from an individual by
another individual) (Platt et al. 2007, p.
310).
Morelet’s crocodiles attain sexual
maturity at about 4.9 ft (1.5 m) in length,
at approximately 7–8 years of age. A
growth rate of 0.63 inches (in) per
month (1.6 centimeters (cm) per month)
was observed in Morelet’s crocodiles
during the first 3 years of life under
protected conditions in Mexico, while a
rate of 0.94–1.18 in per month (2.4–3.0
cm per month) was achieved under
´
farming conditions (Perez-Higareda et
al. 1995, p. 173). Adult females build
nests and lay 20–40 eggs per clutch
´
(Hurley 2005, p. 3; Sanchez 2005, p. 6),
with an average of 35 eggs per clutch
(CITES 2008, p. 9, CITES 2010a, p. 3).
Nests, usually constructed of leaf
mounds at the beginning of the wet
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season (April–June), are located on the
shores of freshwater wetlands, as well as
in coastal lagoons and mangrove
patches (Platt et al. 2008a, pp. 179–182).
An analysis based on DNA
microsatellite data from hatchlings
collected at 10 Morelet’s crocodile nests
in Belize showed that progeny from five
of the 10 nests were sired by at least two
males (McVay et al. 2008, p. 643). These
data suggested that multiple paternity
was a mating strategy for the Morelet’s
crocodile and was not an isolated event.
In addition, this information may be
useful in the application of conservation
and management techniques for the
species.
The eggs of Morelet’s crocodiles hatch
in September–October, 65–90 days after
they are laid. Females attend the nest
during incubation, and can assist the
newborns to leave the nest. Both parents
protect juveniles against predators and
other adult crocodiles (CITES 2010a, p.
3). Nest failures due to flooding and
predation, both avian and mammalian,
are common (Platt et al. 2008a, p. 184).
Expected lifespan in the wild is 50–65
years (Hurley 2005, p. 4.) The Morelet’s
crocodile exhibits and shares with other
crocodilians many acoustic and visual
signals that convey reproductive,
territorial, and other types of
information (Senter 2008, p. 354).
The Morelet’s crocodile occurs
primarily in freshwater environments
such as lakes, swamps, and slowmoving rivers, but can temporarily
inhabit intermittent freshwater bodies,
such as flooded savannahs, and
occasionally observed in brackish
coastal lagoons (Villegas 2006, p. 8).
Floating and emergent vegetation
provide cover to protect young
crocodiles from predators, including
cannibalism by adult crocodiles
´
(Sanchez 2005, p. 7). In contrast to the
Morelet’s crocodile, the American
crocodile feeds mainly on fish and
occurs primarily in coastal or brackish
environments, such as coastal mangrove
swamps, brackish and salt water bays,
lagoons, marshes, tidal rivers, and
brackish creeks. American crocodiles
can also be found in abandoned coastal
canals and borrow pits and may range
inland into freshwater environments
preferred by the Morelet’s crocodile
such as lakes and lower reaches of large
rivers. American and Morelet’s
crocodiles have been known to lay eggs
within the same nest mound as
conspecifics, suggesting a more
gregarious and tolerant demeanor (Brien
et al. 2007, pp. 17–18).
The historical distribution of the
Morelet’s crocodile comprised the
eastern coastal plain of Mexico, most of
the Yucatan Peninsula, Belize, and
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northern Guatemala (Hurley 2005, p. 1),
with an estimated historical distribution
covering 173,746 mi2 (450,000 km2)
´
(Sigler and Domınguez Laso 2008, pp.
11–12). Based on the analyses
conducted for the petition,
approximately 51 percent of the original
geographic distribution in Mexico
remains undisturbed, while
approximately 49 percent is disturbed
or altered. In linear terms, the amount
of undisturbed shoreline habitat
available in Mexico to the Morelet’s
crocodile is about 15,534 mi (25,000
km) of shoreline, which is
approximately 72 percent of the total
undisturbed shoreline habitat available
throughout the species’ range.
According to CONABIO, the amount of
undisturbed shoreline habitat available
to the Morelet’s crocodile in Belize and
Guatemala is estimated to be 2,050 mi
(3,300 km) and 4,163 mi (6,700 km),
respectively, or 9 and 19 percent of the
total undisturbed shoreline habitat
available throughout the species’ range
(CONABIO 2005, pp. 16–19).
Historical estimates of total
population sizes in the three range
countries are unavailable or imprecise,
and we were not able to find any
additional data on historical, range-wide
population estimates for the species.
While not quantifiable or documented
by field surveys, Lee (1996, p. 134)
characterized the historical distribution
and abundance of the Morelet’s
crocodile in the Yucatan Peninsula of
Mexico as follows: ‘‘Throughout its
range, nearly every local aguada (flood)
has (or had) its lagarto, which generally
proves to be C. moreletii.’’ The same
probably could be said about Belize and
Guatemala.
It has been widely reported, however,
that by the middle of the 20th Century,
populations of Morelet’s crocodiles
were widely depleted due primarily to
overharvest for commercial purposes
during the 1940s–1950s. In ‘‘Crocodiles:
An action plan for their conservation,’’
Thorbjarnarson (1992, p. 68 and the
references cited therein) characterized
the Mexican populations of Morelet’s
crocodiles in the early 1990s as very
depleted in the Mexican States of
Tamaulipas and Veracruz, recovering to
some degree and viable in northeastern
Mexico, and severely threatened in
Tabasco State and Campeche State.
However, populations of Morelet’s
crocodiles were not depleted in
southern Chiapas State and eastern
Quintana Roo State (Sian Ka’an
Biosphere Reserve).
Few historical estimates for the
Morelet’s crocodile in Belize are
available, but based on surveys during
1978 and 1979, Abercrombie et al.
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(1980, p. 103) reported that very few
adults were observed in areas where
they had previously been relatively
abundant. This condition was attributed
to overexploitation (i.e., commercial
trade in hides). Thorbjarnarson (1992, p.
55) characterized the Morelet’s
crocodile populations in the early 1990s
as generally depleted in the northern
part of Belize, but relatively abundant in
several other areas. Abercrombie et al.
estimated the total population of
Morelet’s crocodiles older than 9
months of age in Belize at 2,200–2,500
individuals (Abercrombie et al. 1982, p.
16). Nothing was known in the scientific
literature at that time about populations
in the southern part of Belize. The only
available countrywide estimates for the
Morelet’s crocodile in Belize suggested
a total population size of 25,000–30,000
individuals that was declining in
number in 1945, was near depletion
between 1970 and 1980, and, in
response to several protective measures,
had undergone a slow recovery by 2000
to about 20,000 individuals (Finger et
al. 2002, p. 199).
Thorbjarnarson (1992, p. 64)
characterized the Guatemalan
populations in the early 1990s as
depleted, but capable of recovery. He
indicated that 75 individuals had been
´
reported at three lakes in the Peten
Region, in the northern portion of the
country, and that Morelet’s crocodiles
were known to be common in other
parts of that region.
By the late 1990s, little had changed
with regard to our knowledge of the
distribution and abundance of the
Morelet’s crocodile. In ‘‘Crocodiles:
Status survey and conservation action
plan (second edition),’’ Ross (1998, pp.
46–47) characterized several
populations of Morelet’s crocodiles in
all three countries as depleted. In some
´
areas, however, including the Lacandon
Forest (Chiapas State, Mexico) and the
Sian Ka’an Biosphere Reserve (Quintana
Roo State, Mexico), healthy populations
of the Morelet’s crocodile existed. These
findings were based on anecdotal
reports and incidental records;
numerical data were not readily
available.
Based on extrapolations of habitat
relationships (e.g., vegetation type, size
of wetland/riverine feature, and
disturbance factors; described in more
detail in CONABIO 2005, pp. 16–19)
and frequency of encounter rates
(derived from country-specific field
research), the potential global
population of free-ranging Morelet’s
crocodiles in 2004 was estimated to be
102,432 individuals (all age classes;
79,718 individuals in Mexico, 8,803 in
Belize, and 13,911 in Guatemala),
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including approximately 19,400 adults
(CONABIO 2005, pp. 17–19).
Summary of Factors Affecting the
Species
Section 4 of the Act and its
implementing regulations, 50 CFR part
424, set forth the procedures for listing,
reclassifying, or removing species from
the Federal Lists of Endangered and
Threatened Wildlife and Plants.
‘‘Species’’ is defined by the Act as
including any species or subspecies of
fish or wildlife or plants, and any
distinct vertebrate population segment
of fish or wildlife that interbreeds when
mature (16 U.S.C. 1532(16)). Once the
‘‘species’’ is determined, we then
evaluate whether that species may be
endangered or threatened because of
one or more of the five factors described
in section 4(a)(1) of the Act. We must
consider these same five factors in
reclassifying or delisting a species. For
species that are already listed as
endangered or threatened, the analysis
of threats must include an evaluation of
both the threats currently facing the
species, and the threats that are
reasonably likely to affect the species in
the foreseeable future following the
delisting or downlisting and the
removal or reduction of the Act’s
protections. We may delist a species
according to 50 CFR 424.11(d) if the best
available scientific and commercial data
indicate that the species is neither
endangered nor threatened for the
following reasons: (1) The species is
extinct; (2) the species has recovered
and is no longer endangered or
threatened; and/or (3) the original
scientific data used at the time the
species was classified were in error.
Factor A. Present or Threatened
Destruction, Modification, or
Curtailment of the Species’ Habitat or
Range
The overharvest for commercial
purposes, rather than habitat
destruction or modification, was the
primary reason for the Morelet’s
crocodile being listed under the Act and
its inclusion in CITES. However, the
Five Factor Analysis under the Act
requires an analysis of current and
future potential impacts to the species
based on modification or destruction of
habitat.
The petition (CONABIO 2005)
highlights habitat degradation as a
potential threat, especially if it involves
lack of prey and eventual contamination
of water bodies. Currently, the extent of
habitat degradation is estimated to be
moderate in Mexico and Belize, and
´
slightly higher in northern Peten,
Guatemala (CONABIO 2005, Annex 1, p.
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10). However, as stated previously,
historical estimates of range-wide
habitat destruction for the Morelet’s
crocodile are unavailable or imprecise.
We found that the data on habitat
destruction was primarily presented
separately for each individual country.
Therefore, the following analysis of the
potential threats to the species from
habitat destruction or modification first
presents the specific information
available for the Morelet’s crocodile in
each country, and then presents the
general information that was available
for the species as a whole.
Mexico
The Morelet’s crocodile is known
historically from 10 states in Mexico
(from east to west): Quintana Roo,
´
Yucatan, Campeche, Chiapas, Tabasco,
Veracruz, Oaxaca, Hidalgo, San Luis
´
´
Potosı, and Tamaulipas (Aguilar 2005,
p. 2). Based on available information
and interviews during a 1995 site visit
to Mexico by the IUCN Crocodile
Specialist Group, Ross (1998, p. 13)
suggested ‘‘with some confidence’’ that
the Morelet’s crocodile was widely
distributed throughout most of its
original range. At the request of the
petitioner, these states were resurveyed
to assess current Morelet’s crocodile
populations in those areas.
Surveys conducted between 2000 and
2004 documented the widespread
distribution and relative abundance of
wild populations of the Morelet’s
´
crocodile in Mexico (Domınguez-Laso et
al. 2005, pp. 21–30; also summarized in
´
Sanchez Herrera 2000, pp. 17–19;
CONABIO 2005, pp. 11–13 and Annex
´
´
5; Sanchez Herrera and Alvarez-Romero
´
2008, page 415; Garcıa et al. 2007, pp.
´
31–32; Sigler and Domınguez Laso 2008,
pp. 11–13). Surveys found Morelet’s
crocodiles at 63 sites across all 10
Mexican states comprising the species’
entire historic range in Mexico
(CONABIO 2005, p. 12). Habitat
evaluations based on five environmental
components rated habitat quality as
excellent at 10 sites (24 percent), or as
favorable or suitable at 24 sites (57
percent). Furthermore, evidence of the
presence of the Morelet’s crocodile was
found in cultivated areas and at sites
with ‘‘intermediate’’ quality habitats
(CONABIO 2005, p. 13). This suggested
that the Morelet’s crocodile does not
require undisturbed habitat in order to
occupy a site. Habitat mapping resulted
in an estimated minimum of 15,675 mi
(25,227 km) of shoreline as suitable
Morelet’s crocodile habitat in Mexico,
which is 72 percent of the estimated
suitable shoreline habitat available
throughout the species range (CONABIO
2005, pp. 14–16).
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Population characteristics of the
Morelet’s crocodiles in Mexico were
also determined during the 2000–2004
field surveys. All age classes were well
represented (34 percent juveniles; 47
percent subadults; and 19 percent
adults), indicating good recruitment
´
(Domınguez-Laso et al. 2005, p. 31). A
higher proportion of males to females
(1.55 to 1 overall versus about 1 male
per female) was observed in all age
classes, except older subadults
´
(Domınguez-Laso et al. 2005, pp. 33–
34). Mean frequency of encounter, based
on 62 localities surveyed—excluding
one outlier site with an atypically large
crocodile population—was 5.76
individuals per 0.62 mi (= 1 kilometer
(km)) of shoreline (mode = 3.16
´
individuals per km); Domınguez-Laso et
al. 2005, pp. 30, 40). These frequency of
encounter rates were similar to those
reported for other sites, for example: (1)
Sigler et al. (2002, p. 222) reported rates
of 8.33–18.5 individuals per km at
various sites throughout Mexico and
commented that these were the highest
rates ever reported for that country; (2)
´
˜
Cedeno-Vazquez (2002, p. 353) reported
rates of 1–2 individuals per km, when
present (22 of 40 surveys; 711
individuals counted; all age classes
represented; hatchlings in September),
´
at Bahia de Chetumal and Rıo Hondo,
Mexico (n = 17 sites) and commented on
˜
the recovery of the species; (3) Cedeno´
Vazquez et al. (2006, p. 15) reported
rates of 7.6 and 5.3 individuals per km
˜
at La Arriguena, Campeche State, and
commented that this suggested a healthy
population. A population estimate—
based on (a) extrapolations of 3.16
individuals per km, (b) 19 percent
adults, and (c) a cautious estimate of
occupied habitat (15,675 mi (25,227 km)
of river habitat)—produced a result of
approximately 79,718 wild individuals
(all ages) in Mexico comprising 78
percent of the total wild population,
including approximately 15,146 adults
´
in Mexico (Domınguez-Laso 2005, p.
40).
New information now available to the
Service documents updates in the
geographic distribution of the Morelet’s
crocodile in Mexico. Because of several
unauthorized introductions or escapes
from captive-breeding facilities in areas
outside of the reported range of the
species, the Morelet’s crocodile has
become established in the wild at three
sites: Chacahua, Oaxaca State; Villa
Flores, Chiapas State; and Laguna de
´
Alcuzahue, Colima State (Alvarez
Romero et al. 2008, p. 415). Several
captive-breeding facilities along the
Pacific coast in western Mexico contain
Morelet’s crocodiles. These facilities are
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located in areas outside of the reported
range of the species, but potentially
with appropriate habitat for this species.
Concerns have been raised about these
introductions and the potential negative
impacts of this ‘‘exotic’’ or ‘‘invasive’’
´
species on the local biota (Alvarez
Romero et al. 2008, pp. 415 and 417).
The Government of Mexico is making
efforts to diagnose potential threats to
the native American crocodile caused
by hybridization with the introduced
Morelet’s crocodile on the Pacific coast
of Mexico. The goal of these efforts is to
generate morphological and molecular
identification materials and study the
population dynamics of the American
crocodile. It will include monitoring
and harvest of Morelet’s crocodiles and
hybrids for scientific research (CITES
2010a, p. 6).
According to the information
presented in CONABIO 2005, the
Morelet’s crocodile in Mexico occupies
at least 12 protected areas (CONABIO
2005, p. 30 and Annex 6). Part of the
´
Sistema Nacional de Areas Naturales
Protegidas (SINANP or National System
of Protected Natural Areas, described
more fully in the Factor D section,
Inadequacy of Existing Regulatory
Mechanisms), encompasses 13 percent
of the species’ range and include the
following areas: Los Tuxtlas Biosphere
Reserve, Pantanos de Centla Biosphere
´
Reserve, Laguna de Terminos Biosphere
Reserve, Hampolol Wildlife
Conservation and Research Center, El
´
Palmar State Preserve, Rıa Lagartos
Biosphere Reserve, Yum Balam
Biosphere Reserve, Laguna Nichupte,
Sian Ka’an Biosphere Reserve, Bahia
´
Chetumal (Bay) and Rıo Hondo (River).
The Government of Mexico’s 2010
CITES proposal to transfer the Morelet’s
crocodile from CITES Appendix I to
CITES Appendix II provided updated
information on the number of protected
areas for the Morelet’s crocodile in
Mexico. About 77 Federal and certified
protected areas in Mexico provide
shelter and legal protection to the
Morelet’s crocodile in its potential
range. Of these, 11 have records of the
species covering 7,763,147 acres (ac)
(3,141,634 hectares (ha)) (CITES 2010a,
pp. 11, 17–20). The Government of
Mexico designated eight of the eleven
protected areas containing Morelet’s
crocodiles as Biosphere Reserves, and
the three remaining protected areas
containing Morelet’s crocodiles as Flora
and Fauna Protection Areas. As stated
above, these protected areas are part of
SINANP (described more fully in the
Factor D section, Inadequacy of Existing
Regulatory Mechanisms).
The Government of Mexico’s 2010
CITES proposal used both a narrative
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description (CITES 2010a, p. 11) and a
list (CITES 2010a, pp. 17–20) to indicate
that there are 11 federally protected
areas in Mexico containing Morelet’s
crocodile. CONABIO 2005 used a
narrative description (CONABIO 2005,
p. 30) to indicate that there are at least
12 federally protected areas in Mexico
containing Morelet’s crocodile
(CONABIO 2005, p. 30), but did not
include a list of the federally protected
areas. Based on the information
available to the Service, we were unable
to find any additional data to explain
the difference between in the numbers
of federally protected areas cited in
these two documents. The Government
of Mexico’s 2010 CITES proposal is the
more recent document, and we consider
it to contain the best available scientific
and commercial data on the number of
federally protected areas in Mexico.
The Convention on Wetlands of
International Importance especially as
Waterfowl Habitat (also known as the
Ramsar Convention) is an
intergovernmental treaty that provides a
framework for international cooperation
for the conservation of wetland habitats.
CONABIO 2005 did not provide
information on whether the Ramsar
Convention protects any Morelet’s
crocodile habitat in Mexico. However,
this information was included in the
Government of Mexico’s 2010 CITES
proposal. According to their 2010 CITES
proposal, there are 41 Ramsar sites in
the potential range of the Morelet’s
crocodile in Mexico, 13 of which have
records of the species covering
6,779,875 ac (2,743,718 ha) (CITES
2010a, pp. 11, 17–20).
According to the information
presented in CONABIO 2005, one of the
main potential threats to the Morelet’s
crocodile is habitat destruction and
fragmentation due to residential and
infrastructure development, such as
dams, roads, residential areas, and
irrigated fields (CONABIO 2005, Annex
2, pp. 4–5). The information presented
in CONABIO 2005 indicated that land
reform and the ensuing colonization of
undeveloped areas is a potential threat
to the Morelet’s crocodile, but the
Government of Mexico has no such
actions planned at this time (CONABIO
2005, p. 33). This threat of habitat
degradation is ameliorated in Mexico by
´
the Ley General de Equilibrio Ecologico
´
y Proteccion al Ambiente (LGEEPA;
General Ecological Equilibrium and
Environmental Protection Law). This
1988 law has strict restrictions against
land use changes in Mexico, especially
for undisturbed habitat such as those
areas used by the Morelet’s crocodile
(CONABIO 2005, p. 25). This law is
supported by several others in Mexico
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that ensure the conservation of native
flora and fauna in Mexico (see
discussion in the Factor D section,
Inadequacy of Existing Regulatory
Mechanisms; also see CONABIO 2005,
Annex 3).
According to the information
presented by CONABIO, even in the
historic context of prolonged habitat
alteration, wild populations of Morelet’s
crocodiles remained abundant; so much
so that large, commercial exploitation of
the species was occurring up until
Federal and international protections
were put in place 40 years ago.
Alteration of Morelet’s crocodile habitat
occurring since then may have
produced some additional reductions in
local populations, but these reductions
are not comparable to those of the past.
In addition, even in areas where
changes to the original environment are
not reversible, evidence points to a
certain degree of tolerance by Morelet’s
crocodiles, especially when the habitat
alterations are a result of agriculture or
low technology livestock production
(CONABIO 2005, p. 25).
Based on surveys, it appears that the
Morelet’s crocodile in Mexico occurs in
all 10 states from where it traditionally
has been reported (CONABIO 2005, pp.
11–19). Although approximately 49
percent of the original range in Mexico
has been altered, much of the altered
habitat is still occupied by the Morelet’s
crocodile. Approximately 77,220 mi2
(200,000 km2) of undisturbed habitat
remains in Mexico, which is equivalent
to approximately 15,534 mi (25,000 km)
of shoreline. The Government of Mexico
protects habitat occupied by the
Morelet’s crocodile in 11 areas
designated by the Government of
Mexico as either Biosphere Reserves or
Flora and Fauna Protection Areas
covering a total of 7,763,147 ac
(3,141,634 ha). In addition, the Ramsar
Convention protects Morelet’s crocodile
habitat at 13 sites in Mexico covering
6,779,875 ac (2,743,718 ha). We do not
have any information or data on the
amount of geographic overlap, if any,
between the areas of habitat protected
by the Government of Mexico versus
that protected by the Ramsar
Convention. Therefore, we considered
these two protection mechanisms as
providing separate, but complimentary,
habitat protection as part of our analysis
of habitat protection under this
proposed rule.
We find that the information
presented in the petition, as well as the
additional information available to the
Service, represents the best available
scientific and commercial data on
habitat destruction or modification for
Morelet’s crocodiles in Mexico.
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Although moderate habitat destruction
or modification is currently affecting
local populations of Morelet’s
crocodiles in Mexico, and this is likely
to continue in the foreseeable future,
these activities would not have a
significant impact on the species
because they would be subject to
conservation measures under the
Government of Mexico’s regulatory
framework. This framework will
continue to provide adequate protection
to the Morelet’s crocodile and its habitat
in the foreseeable future. Surveys
conducted found Morelet’s crocodiles at
63 sites across all 10 Mexican states
comprising the species’ entire historic
range in Mexico (CONABIO 2005, p.
12). Given that Mexico contains more
than 85 percent of the species’ natural
range, an estimated 78 percent of all
wild individuals, that 7,763,147 ac
(3,141,634 ha) of habitat are protected
by the Government of Mexico, and that
6,779,875 ac (2,743,718 ha) of habitat
are protected by the Ramsar Convention,
we conclude that habitat destruction or
modification is neither a threat, nor is
it anticipated to significantly impact the
Morelet’s crocodile in Mexico in the
foreseeable future.
Belize
The Morelet’s crocodile was
historically known from all six states in
Belize (from north to south): Corozal,
Orange Walk, Belize, Cayo, Stann Creek,
and Toledo (Anonymous 1998).
According to information provided by
CONABIO, virtually all of the country
contained suitable habitat for the
species. The style of economic
development in Belize has not required
massive alteration of the natural
environment. Thus, in general, no
extensive and drastic alteration of
Morelet’s crocodile habitat has occurred
in Belize (CONABIO 2005, p. 26). The
current amount of altered versus
unaltered current habitat for the
Morelet’s crocodile in Belize is
unknown, but the petitioners estimated
the current amount of potentially
suitable habitat to be approximately
2,050 mi (3,300 km) of shoreline
(CONABIO 2005, pp.14–19).
While the species is widespread in
the northern portion of the country, it is
naturally limited to a narrow region of
lowlands along the coast in the southern
part of Belize, which is otherwise
mountainous (Schmidt 1924, p. 80;
Abercrombie et al. 1982, pp. 12–16;
Platt et al. 1999, p. 395; Platt and
Thorbjarnarson 2000a, pp. 25–26).
Although the Government of Belize was
not a party to the petition, teams not
associated with the Mexican effort to
delist the species recently surveyed
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these states, in part, to assess Morelet’s
crocodile populations in those areas.
Based on recent surveys, all six districts
historically known to contain Morelet’s
crocodiles were surveyed in a general
characterization of the biodiversity of
Belize (Boles 2005, p. 4; Belize Forest
Department 2006, p. 22; BiologicalDiversity.info website 2009). At Spanish
Creek Wildlife Sanctuary, in the northcentral part of the country, Meerman et
al. (2004, pp. 23–24 and 30–32)
determined that the Morelet’s crocodile
was fairly common at the site (frequency
of encounter rate = 1.4–2.4 individuals
per km). At Mayflower Bocawina
National Park, near the coast in the
southeastern part of the country,
Meerman et al. (2003b, p. 30)
unexpectedly located the Morelet’s
crocodile at fast-flowing streams such as
Silk Grass Creek. While this specimen
could have been introduced at the site,
its occurrence could also be natural.
Along the Macal River, in west-central
Belize, Stafford et al. (2003, pp. 18 and
20) located a breeding population of the
Morelet’s crocodile (frequency of
encounter rate = 1.48 individuals per
km) (2001) and 1.25 individuals per km
(2002) at a mountainous site at 1,476 ft
(450 m) elevation (higher than
expected). A total population size at the
Macal River site was calculated to be, at
minimum, about 94 individuals
(Stafford et al. 2003, p. 19).
Earlier comparisons between spotlight
surveys conducted in northern Belize in
1979–1980 and 1992–1997 also showed
that Morelet’s crocodiles were widely
distributed and relatively abundant
across several habitat types and levels of
human accessibility (Platt and
Thorbjarnarson 2000b, p. 23). In
addition to an extensive system of
nature reserves including significant
areas of crocodile habitat, these
researchers noted relatively high
Morelet’s crocodile encounter rates in
wetlands surrounding sugarcane fields
in this area. Morelet’s crocodiles were
observed in canals and ditches within
the municipal limits of Belize City and
Orange Walk, as well as in wetlands
easily accessible from many villages
(Platt and Thorbjarnarson 2000b, p. 23).
Population characteristics of Morelet’s
crocodiles in Belize were also
determined during these surveys. Size
class distribution—25.4 percent adults
in the 1990s, compared with 5–10
percent in an earlier study—was
consistent with population recovery
from past overexploitation (Platt and
Thorbjarnarson 2000b, p. 24). Platt and
Thorbjarnarson (2000b, pp. 23, 26)
reported an overall frequency of
encounter of 1.56 individuals per km;
encounter rates were much higher in
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nonalluvial (8.20 individuals per km)
and alluvial (6.11 individuals per km)
lagoons than in rivers and creeks (0.95
individuals per km) or in mangrove
habitats (0.24 individuals per km).
While a significant, male-biased sex
ratio (5.3 males per 1 female versus
about 1 male per female) was identified,
the reasons were unclear (Platt and
Thorbjarnarson 2000a, pp. 23, 27).
Based on extrapolations of habitat
relationships in Mexico (which results
in an estimated 2,080 mi (3,347 km) of
potential habitat in Belize) and an
average frequency of encounter of 2.63
individuals per km, CONABIO stated
that these results suggested a total
Belize population estimate for the
Morelet’s crocodile of about 8,803
individuals in the wild (all age classes),
comprising 9 percent of the total wild
population, including about 1,673
adults (CONABIO 2005, p. 18).
Although this is not a typically
constructed population estimate, this
estimate constitutes the best available
scientific and commercial data for the
nationwide abundance of Morelet’s
crocodiles in Belize. Although Platt
suggested that these overall values for
Belize may be somewhat inflated
because habitat in southern Belize is
less suitable for Morelet’s crocodiles
than areas in the north (Platt 2008, pers.
comm.), frequency of encounter values
for Morelet’s crocodile populations and
total population sizes in Belize may
have further increased due to continued
protection for over a decade since these
surveys in the 1990s. Boles (2005, p. 4)
and Belize Forest Department (2006, p.
22), based on countrywide analyses,
both suggested that the Morelet’s
crocodile had ‘‘recovered’’ in Belize and
could be categorized as ‘‘healthy.’’
CONABIO did not present
information about the distribution and
abundance of the Morelet’s crocodile in
protected areas in Belize. Other
information obtained by the Service,
however, suggests that the species is
present in many protected areas in
Belize, including: Sarstoon Temash
National Park (Meerman et al. 2003a, p.
45), Mayflower Bocawina National Park
(Meerman, et al. 2003b, p. 30), and
Spanish Creek Wildlife Sanctuary
(Meerman et al. 2004, pp. 30–31).
Overall, about 18–26 percent of the
national territory of Belize is under
some form of protection (BERDS 2005b,
p. 1; Young 2008, p. 29). In several of
these protected areas, natural resource
extraction is permitted from the site,
thus potentially limiting their
contribution to the conservation status
of the Morelet’s crocodile. However, we
have no evidence that resource
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extraction in these Belizean protected
areas is currently or anticipated to affect
significantly the Morelet’s crocodile.
We find that the data presented by
CONABIO, and additional data available
to the Service, represents the best
available scientific and commercial data
on habitat destruction or modification
for Morelet’s crocodiles in Belize.
Although habitat destruction or
modification is currently affecting some
local populations of Morelet’s
crocodiles in Belize, and this is likely to
continue in the foreseeable future, we
do not have any evidence that habitat
destruction or modification is currently
or anticipated to be a threat to the
Morelet’s crocodile in Belize.
Guatemala
The Morelet’s crocodile was
historically known from the northern
´
portion of Guatemala (States of Peten
and Alta Verapaz; Schmidt 1924, pp.
79–84). According to information
´
provided by CONABIO, the Peten region
of Guatemala was scarcely populated by
humans before 1960 (an estimated
15,000 to 21,000 inhabitants in
approximately 12,960 square miles
(33,566 km2) or about one third of
Guatemala’s area) (CONABIO 2005). In
1961, the Government of Guatemala
started an official program to foster
colonization in the region, and this
caused environmental alteration, as well
as increased human conflicts with
crocodiles. Slightly more than 50
percent of the potential habitat for the
Morelet’s crocodile has been altered in
Guatemala (CONABIO 2005, p. 26).
While the current amount of altered
versus unaltered habitat for the
Morelet’s crocodile in Guatemala is
unknown, the petitioners estimated the
current amount of potentially suitable
habitat to be approximately 4,163 mi
(6,700 km) of shoreline (CONABIO
2005, pp.14–19). According to
information provided by CONABIO,
studies on the status of Morelet’s
crocodile habitat and population in
Guatemala are underway, and the
potential threats to the species are under
assessment (CONABIO 2005, p. 26).
Recent nationwide survey results are
not available for Guatemala, but
populations appear to remain in their
historical range in the northern part of
the country, especially the central
´
portion of the State of Peten, Laguna del
Tigre National Park (northwestern
´
˜
portion of the State of Peten) (Castaneda
Moya et al. 2000, p.63) and the El
´
Mirador-Rıo Azul National Park
(ParksWatch, 2002, page 3). The Laguna
del Tigre National Park, the largest
national park in Guatemala and the
largest protected wetland in Central
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America, is home to the largest numbers
of Morelet’s crocodiles in Guatemala
(ParksWatch 2003, p. 1).
While information regarding the
distribution and abundance of Morelet’s
crocodile in Guatemala is sparse,
investigations conducted in Laguna del
Tigre National Park (date unspecified,
reported in 1998) estimated 4.35
individuals per km in the Sacluc River
and 2.1 individuals per km in the San
Pedro River, with a population structure
˜
typical of stable populations (Castaneda
˜
Moya 1998a, p. 13). Castaneda Moya
(1997, p. 1; 1998a, p. 521) characterized
Morelet’s crocodile distribution in the
´
northern State of Peten, Guatemala, as
fragmented, with the healthiest
populations in the northern region of
´
Peten, where human impact was lower.
In a follow-up study at Laguna del Tigre
˜
National Park Castaneda Moya et al.
(2000, pp. 62–63) reported a mean
frequency of encounter rate for the
entire park of 4.3 individuals per km,
with maximum values of 12.28
individuals per km at Flor de Luna and
11.00 individuals per km at Laguna La
Pista. The Morelet’s crocodile was more
frequently encountered in closed
aquatic systems than in open aquatic
systems. Juveniles were more frequently
observed than were adults.
Based on extrapolations of habitat
relationships in Mexico (which resulted
in an estimated 4,159.8 mi (6,694.5 km)
of potential habitat in Guatemala) and
an average frequency of encounter of
2.078 individuals per km, CONABIO
stated that there is an estimated total
Guatemalan population of Morelet’s
crocodile of about 13,911 individuals in
the wild (all age classes) comprising 13
percent of the total wild population,
including about 2,643 adults (CONABIO
2005, p. 18). Although this is not a
typically constructed population
estimate, this population estimate
constitutes the best available scientific
and commercial data for the nationwide
abundance of Morelet’s crocodiles in
Guatemala.
While Guatemala has regulatory
mechanisms in place to protect these
habitats, it appears that the Government
of Guatemala, until recently, was not
able to enforce them adequately.
Resource extraction, drug trade, a lack
of enforcement, and financial issues
limited protected areas’ potential
contribution to the conservation status
of the Morelet’s crocodile (IARNA URL
IIA 2006, pp. 88–92). For example, the
Laguna del Tigre National Park, together
with the Laguna del Tigre Protected
Biotope, was considered critically
threatened by drug trade, land grabs, the
presence of human settlements,
expanding agriculture and cattle
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ranching, poaching, forest fires, the oil
industry, and the almost complete lack
of institutional control over the area
(ParksWatch 2003, p. 11.) ParksWatch
also deemed this national park, and its
surrounding area, would not meet its
biological diversity objectives in the
immediate future unless urgent steps
were taken (ParksWatch 2003, p. 11.)
However, the following year
ParksWatch noted major improvements
at Laguna del Tigre since their 2003
report. We have obtained information
on the specific protections recently
provided to Morelet’s crocodiles in the
conservation areas of Guatemala, and
events that reveal a commitment by the
Guatemalan government to curtail
illegal activities harmful to Laguna del
Tigre National Park. We will go into
detail in the Factor D section,
Inadequacy of Existing Regulatory
Mechanisms.
˜
Castaneda Moya et al. (2000, p. 61),
based on historical references, cited
increased destruction of habitat due to
human encroachment as having an
adverse affect on the species. Based on
the research at Laguna del Tigre
˜
National Park, Castaneda Moya et al.
(2000, pp. 61 and 65) indicated that
sibal (sawgrass) (Cladium jamaicense)
was extensively burned each year. This
burning constituted a major impact to
the Morelet’s crocodile habitat, as sibal
habitat offered suitable insulation, food
availability, nesting cover, and
protection from predators. Furthermore,
the fires facilitated the expansion of
savannahs consisting almost exclusively
of jimbal (Bambusa longifolia). Studies
´
on the Morelet’s crocodile in Peten
suggest fires in jimbal groves prevent
Morelet’s crocodiles from reproducing
since fire affects nesting sites
(ParksWatch 2003, p. 13). In a more
general sense, USAID (2002, pp. 19–23)
˜
and Ruiz Ordonez (2005, pp. 2–8)
indicated several conservation threats at
the national level in Guatemala,
including habitat loss, habitat
degradation, habitat fragmentation,
overutilization of resources,
environmental contamination, and
degradation, and the introduction of
exotic species.
For the past ten years, USAID and
WCS having been working with other
NGOs and the Guatemalan government
to combat these issues. In their ‘‘Maya
Biosphere Landscape Conservation
Area, Guatemala, Implementation Plan
FY 2008’’ (WCS 2009, page 3) the WCS
highlighted their central goals for
ensuring the conservation of wideranging target species, including the
Morelet’s crocodile, was to contain the
advance of the Laguna del Tigre agropastoral frontier and maintain the
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comparatively intact eastern bloc of the
Maya Biosphere Reserve (MBR) forest.
Strategies to reduce impacts to wildlife
in the MBR landscape include involving
people in local communities, forest
concessions, governments, and NGOs in
local conservation efforts; developing
adaptive management strategies to
address tactically threats across the
landscape; and educating local
communities on best management
practices across the MBR and beyond.
Since 2003, however, efforts by the
Wildlife Conservation Society (WCS)
have reduced areas burned in the MBR
in Guatemala. Through educating locals
on best management practices,
conducting aerial flights, utilizing
remote sensing to monitor changes in
forest cover and fire, and establishing
and patrolling a 47-kilometer fire break,
along with regularly reporting to the
Guatemalan and provincial governments
and national media, WCS’s efforts have
resulted in a 90% reduction in areas
burned in the Laguna del Tigre portion
of the MBR (WCS 2009).
In addition, the president of
Guatemala recently deployed 250
specially trained soldiers to recover
fully all the protected zones of El Peten
in Laguna del Tigre National Park. The
contingent, called the ‘‘green battalion’’
will work jointly with the Guatemalan
Attorney General’s Office. This effort is
aimed at combating drug trafficking and
removal or destruction of natural and
archeological resources in Laguna del
Tigre, El Peten region of the MBR (Latin
American Herald Tribune, 2010).
´
El Mirador-Rıo Azul National Park in
northeastern Guatemala is located in the
´
department of Peten maintains a
population of Morelet’s crocodiles
(ParksWatch 2002, page 3). The park is
composed of two sections, which are
divided by the Dos Lagunas Biotope.
The western section is known as El
Mirador and the eastern part is known
´
as Rıo Azul. This area is considered by
World Resources Institute to be the last
pristine Guatemalan rainforest. It is also
one of the few protected areas that have
experienced little deforestation over the
years. No permanent human residents
live within the park borders or in its
immediate surrounding areas. El
´
Mirador-Rıo Azul National Park is
considered vulnerable, by ParksWatch,
meaning that immediate conservation
measures are not needed at this time,
but monitoring is necessary to ensure
the protection and maintenance of its
biological diversity in the near future
(ParksWatch, 2002, page 3). NGO’s such
´
as Asociacion Balam, WCS-Guatemala,
´
the Asociation of Forest Communities of
´
Peten (ACOFOP), the Guatemalan
National Park Service (CONAP), the
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Guatemalan Archeological Institute
(IDAEH), and the office of the Executive
Secretary of the President of Guatemala
formed an alliance called the ‘‘Mesa
Multisectorial para el Area Natural y
Cultural de Mirador-Rio Azule’’. This
alliance was formed to develop
consensus among its team members
regarding the long-term protection of the
park and provide sustained economic
contribution to the people of the MBR
and of Guatemala.
While CONABIO estimated that
slightly more than 50 percent of the
potential habitat for the Morelet’s
crocodile has been altered in Guatemala,
they gave no information indicating to
what extent (CONABIO 2005, p. 26).
Very little information has been
collected about the consequences of
forest fires, hunting, and habitat
fragmentation to the Morelet’s crocodile.
However, Mexico saw the presence of
the Morelet’s crocodile in cultivated
areas and at sites with ‘‘intermediate’’
quality habitats (CONABIO 2005, p. 13)
and Belize noted relatively high
Morelet’s crocodile encounter rates in
wetlands surrounding sugarcane fields,
canals and ditches within the municipal
limits of Belize (Platt and
Thorbjarnarson 2000b, p. 23). This
information suggests that the Morelet’s
crocodile does not require undisturbed
habitat in order to occupy a site. The
current amount of altered versus
unaltered habitat for the Morelet’s
crocodile in Guatemala is unknown, but
the petitioners estimated the current
amount of potentially suitable habitat to
be approximately 4,163 mi (6,700 km) of
shoreline (CONABIO 2005, pp.14–19).
Other Threats to the Species’ Habitat
Recreational and Educational Activities
Nonconsumptive recreational or
educational uses in the form of
ecotourism are ongoing and may grow
in magnitude in the future. While
CONABIO did not present precise
information about the number of
companies or sites visited by tourists, an
informal Internet search suggested that
large numbers of ecotourism companies
and nature sites in all three range
countries were involved in this activity.
At Tikal National Park in Guatemala, for
example, the number of visitors has
increased from 14,594 visitors in 1981
to 141,899 visitors in 2002 (IARNA URL
IIA 2006, p. 103). Many of these visitors
potentially visited Morelet’s crocodile
´
areas in the Peten Region that are in the
immediate vicinity of the park as part of
their ecotourism experience.
While we cannot completely rule out
the potential for adverse effects to the
Morelet’s crocodile due to disturbance
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from ecotourism activity in Tikal
National Park, we have found no
evidence of such effects. Furthermore,
we do not have any information to
indicate that ecotourism is likely to
become a serious problem in the future.
Successful ecotourism, by its very
nature, relies on the continued
conservation and protection of the
natural resources it uses. Although the
number of visitors to protected areas is
increasing and the demand for
ecotourism may grow in the future, the
ecotourism industry has a significant
incentive to ensure that their activities
do not become a serious problem to the
Morelet’s crocodile and its habitat in the
future.
Mazzotti et al. (2005, p. 984),
however, did identify the following
negative impacts associated with
tourism development at Sian Ka’an
Biosphere Reserve (Mexico):
(1) Habitat loss;
(2) Alteration of surface and
underground water flow;
(3) Ground water pollution;
(4) Extraction of resources;
(5) Erosion and sedimentation;
(6) Decrease in biodiversity; and
(7) Reduced traditional and
recreational use for local communities.
Visual pollution, including trash, as
well as ‘‘jeep safaris’’ (caravans of small
convertible sports utility vehicles being
driven through the reserve) and boat
traffic, is also increasing at Sian Ka’an
Biosphere Reserve (Mazzotti et al. 2005,
p. 992). While none of these factors was
specifically linked to the Morelet’s
crocodile, all could apply were the
situation to deteriorate. However, we do
not have any information to indicate
that the situation will deteriorate in the
future. Biosphere Reserves in Mexico
are part of the United Nations
Educational, Scientific, and Cultural
Organization’s (UNESCO) ‘‘Man and the
Biosphere’’ program and are legally
protected under Mexican federal laws.
Key features of biosphere reserves are
core zones of complete protection of key
resources surrounded by mixed-use
buffer zones. These buffer zones are
particularly important given the
pressures on the Sian Ka’an Biosphere
Reserve from tourism, and its culturally
and archeologically significant areas
(Mazzotti et al. 2005, p. 982).
Recognizing these potential negative
factors, geographically dispersed
ecotourism involving limited numbers
of visitors under controlled conditions
to observe and photograph specimens
from canoes, photographic blinds, or
hiking trails can provide relatively
benign opportunities to local residents
for economic benefits that can serve as
an alternative or disincentive to harvest
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the Morelet’s crocodile (CONABIO
2005, p. 28).
There is also evidence that
ecotourism, as well as scientific
research and wildlife conservation, are
compatible activities with respect to the
Morelet’s crocodile. In Mexico, for
example, ecotourists accompany
biologists associated with the Amigos de
Sian Ka’an group as they conduct
surveys of the Morelet’s crocodile at
Sian Ka’an Biosphere Reserve, along the
eastern coast of the Yucatan Peninsula,
Quintana Roo State (EcoColors Tours
2010, pp. 1). At another site, the La
Ventanilla Eco-tourism Project in
Oaxaca State, Mexico, international
volunteers assist local residents and
biologists to conserve the Morelet’s
crocodile, turtles, iguanas, and other
species of wildlife (Volunteers for
International Partnership—Mexico
2010, 1–4). In Belize, tourists, as well as
wildlife researchers from the United
States and their Belizean counterparts,
are implementing an ecological field
study of the Morelet’s crocodile at
Lamanai Outpost Lodge and Research
Station that eventually will lead to the
development of a national management
plan for the species (The Croc Docs
2010, pp. 1–6). If the biological data, in
part collected by the ecotourists,
support harvest, and effective
enforcement regulations can be
developed and implemented, this plan
may include commercial exploitation of
the Morelet’s crocodile. In Guatemala,
scientists and ecotourists are working
´
cooperatively with the ProPeten group
to undertake conservation work at the
Scarlet Macaw Biological Station in the
Maya Biosphere Reserve (ProPeten
2009, p. 1). While these activities differ
with regard to specific details, in
general they provide positive
conservation benefits to the Morelet’s
crocodile and demonstrate that
ecotourism, as well as scientific
research and wildlife conservation, can
be compatible with respect to the
species.
Agriculture, Grazing, and Infrastructure
Development
Agriculture, grazing, and
infrastructure development (such as
dams, roads, residential areas, and
irrigated fields) generally are indirect
impacts in that the purpose of the action
is not focused on the crocodile. These
activities can be either consumptive (for
example, destruction of nests and eggs
by machinery) or nonconsumptive (for
example, loss of access to traditional
nesting or feeding sites), and are
generally manifested through habitat
loss or fragmentation. Depending on the
nature and extent of these activities,
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they may have a substantial negative
impact on local Morelet’s crocodile
populations. Although agriculture,
grazing, and infrastructure development
are currently affecting local populations
of Morelet’s crocodiles, and this is likely
to continue in the foreseeable future, we
do not have any evidence that these
activities are currently or anticipated to
be a range-wide threat to the Morelet’s
crocodile.
Summary of Factor A
Although some habitat degradation
has occurred in Mexico, this threat is
ameliorated by the LGEEPA. This law
has strict restrictions against land use
changes in Mexico, especially for
undisturbed habitat such as those areas
used by the Morelet’s crocodile
(CONABIO 2005, p. 25). The Sistema
´
Nacional de Areas Naturales Protegidas
(SINANP) also provides significant
habitat protection in Mexico. The
SINANP created designated protected
areas because these areas contain key or
representative ecosystems or species, or
ecosystems or species that are at risk
and require strict control. In Mexico, at
least 11 protected areas contain
populations of the Morelet’s crocodile
(CITES 2010a, pp. 17–20). In Belize, at
least three protected areas contain
Morelet’s crocodile populations
(Meerman et al. 2003a, p. 45; Meerman
et al. 2003b, p. 30; and Meerman et al.
2004, pp. 30–31). Mexico and Belize
contain the majority of all wild
Morelet’s crocodiles (87 percent) and
the majority of the potentially suitable
habitat throughout the species’ range (81
percent). We find that, although habitat
destruction and modification is affecting
individual crocodiles locally, the overall
level of habitat protection in Mexico
and Belize is currently adequate and we
anticipate that it will remain so.
Based on current information,
Guatemala contains the remaining 13
percent of the wild Morelet’s crocodiles
and the remaining 19 percent of the
potentially suitable habitat throughout
the species’ range. Although the
Morelet’s crocodile occupies at least two
˜
protected areas in Guatemala (Castaneda
Moya et al. 2000, p. 63), one, the El
´
Mirador-Rıo Azul National Park has no
permanent human presence either in or
surrounding the park and contains the
last pristine rainforest in Guatemala
which has experienced very little
deforestation. The NGO community has
partnered with the President of
Guatemala to establish a coalition to
ensure long-term protection of this
important national park, while
providing for sustainable economic
incentives to the people of the MBR and
of Guatemala. The second protected
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area, Laguna del Tigre National Park,
has been affected by past human
encroachment, fire, deforestation,
grazing, and infrastructure
development. Although these factors
may have affected local populations of
Morelet’s crocodiles, we have no
evidence that it has affected the species
range-wide. The government of
Guatemala and the local and
international NGO community have
again partnered to address these issues
through direct interventions; including
local and international community in
conservation efforts; and educating
people on the use of best management
practices. These efforts have resulted in
a 90% reduction in fires in Laguna del
Tigre National Park, and the successful
interdiction of individuals conducting
unlawful activities.
Despite the localized impacts in all
three countries, the current range-wide
distribution of Morelet’s crocodile now
closely resembles historical range-wide
distribution. The species has existing
available high quality habitat, healthy
population distribution, is abundant at
known sites and it is expanding into
new sites. Even in the face of habitat
alteration, this species has been shown
to occupy disturbed habitat. There have
been observed increases in the relative
abundance of the species, and a total
population size of approximately 19,400
adults in the three range countries.
Species experts now widely characterize
Morelet’s crocodile populations as
healthy. Although some local factors
continue to affect the habitat for
Morelet’s crocodile, we have no
information to indicate that these local
factors are of sufficient magnitude to
have a range-wide impact on the species
to the point that would cause the
Morelet’s crocodile to meet the
definition of either an endangered or a
threatened species. Therefore, we find
that the present or threatened
destruction, modification, or
curtailment of its habitat or range is not
likely to threaten or endanger the
Morelet’s crocodile in the foreseeable
future.
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Factor B. Overutilization for
Commercial, Recreational, Scientific, or
Educational Purposes
Commercial Harvest (Legal and Illegal
Trade)
The Morelet’s crocodile was included
in Appendix I of CITES on July 1, 1975.
Species included in Appendix I are
species threatened with extinction that
are or may be affected by trade. CITES
prohibits international trade in
specimens of these species unless the
trade is found to be not detrimental to
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the survival of the species, the
specimens in trade were legally
acquired, and the purpose of the import
is not for primarily commercial
purposes or the specimen meets one of
the exemptions established under the
CITES Treaty. A more thorough
explanation of CITES is found in the
‘‘Convention on International Trade in
Endangered Species of Wild Fauna and
Flora’’ discussion under the section
Factor D. Inadequacy of Existing
Regulatory Mechanisms.
Overexploitation for commercial
purposes prior to 1970 is widely
accepted as the primary cause of a
drastic, range-wide population decline
of Morelet’s crocodile (Platt and
Thorbjarnarson 2000b, p. 21; CONABIO
2005, p. 27). Historically, commercial
overexploitation, through the harvest of
adult animals from the wild, was a
much greater threat to the Morelet’s
crocodile than habitat loss. During the
first half of the 20th century, hundreds
of thousands of skins per year were
marketed (CITES 2008, pp. 17, 20). The
precise magnitude of the trade is
unclear however, because trade data for
the Morelet’s crocodile was recorded at
a higher taxonomic level incorporating
other crocodilians. See, for example,
Loa Loza 1998a, pp. 134–135; ArroyoQuiroz et al. 2007, p. 933. It is reported
that prior to 1975, hide dealers in Belize
purchased up to 12,000 skins annually,
and an unknown number of skins were
exported illegally in contravention to
Mexican law (Plat and Thorbjarnarson
2000b, p. 21). Precise estimates of
historical trade from Mexico or
Guatemala were unavailable. Even now,
the commercial market for designer
fashion items made from high quality
crocodile skins, such as leather belts,
footwear, wallets, and handbags, is
highly lucrative. For example, a single
pair of shoes may retail for hundreds of
dollars, a handbag for several thousand
dollars, and a tote bag for tens of
thousands of dollars.
Legal Trade
In 1997, the Government of Mexico
established a system for registering,
supervising, and enforcing Unidad de
´
Manejo y Administracion (UMAs;
Conservation Management and
Administrative Units) for intensive
reproduction of economically valuable
natural resources, including the captive
breeding of Morelet’s crocodiles
(CONABIO 2005, Annex 3, pp. 3–5).
Commercial use of Morelet’s crocodiles
in Mexico for domestic trade was
strictly limited to animals raised in
closed-cycle, captive-breeding
operations regulated by the Government
of Mexico under the UMA system. For
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international trade, commercial trade
was restricted to animals raised in these
closed-cycle, captive-breeding
operations registered with the CITES
Secretariat. In order for these closedcycle, captive-breeding operations to be
successful, great care was given to
satisfying the biological requirements of
the species (Cremieux et al. 2005, p.
417; Brien et al. 2007, pp. 1–26).
´
´
According to Leon Velazquez (2004, p.
52), there were approximately 30,000
Morelet’s crocodiles in captive-breeding
facilities in Mexico in 2004. There were
38,449 Morelet’s crocodiles housed in
19 Mexican closed-cycle captivebreeding operations in 2008 (CITES
2010a, p. 24). Currently, the annual
production of Morelet’s crocodiles in
Mexican closed-cycle captive-breeding
operations does not exceed 40,000
individuals (CITES 2010a, p. 8).
Under Mexican law, closed-cycle
captive-breeding operations wishing to
make their Morelet’s crocodiles
available for commercial use must
demonstrate that they are able to go
beyond the F2 generation of
reproducing individuals. This
requirement supports the use of
Morelet’s crocodiles that is compatible
with conservation of the species by
offsetting the demand for crocodiles
taken from the wild. Such facilities
produced a variety of items including
skins/hides, meat, live individuals as
pets, stuffed figurines, and leather
products (fashion accessories) for both
domestic and international trade.
Based on CITES annual reports for the
period 1996–2005, Caldwell (2007, pp.
6–7) noted relatively low levels of
international legal trade in products
from Mexican captive-breeding
operations during 1996–1999 (fewer
than 200 skins/year), but higher levels
during 2000–2005 (2,430 skins in 2001;
1,591 skins in 2002; and below 1,000
skins per year during the rest of the
period). Japan has been the main
importer of products from Mexican
captive-breeding operations, with lesser
quantities going to France, Italy, the
Republic of Korea, and Spain (Caldwell
2007, p. 6).
The United Nations Environment
Programme—World Conservation
Monitoring Centre (UNEP–WCMC)
manages a trade database on behalf of
the CITES Secretariat. Each Party to
CITES is responsible for compiling
annual reports to the CITES Secretariat
regarding their country’s trade in
species protected under CITES. UNEP–
WCMC enters the data from these
annual reports into a trade database,
which is used to analyze trade in CITES
specimens. Due to the time needed to
compile the data, the most recent year
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for which comprehensive trade statistics
are available is normally two years prior
to the current year.
In general, prior to 2010, international
legal trade consisted of small quantities
of unfinished hides/skins or finished
leather products, exported primarily
from Mexico to Japan and European
countries, as well as biological
specimens destined for research. These
countries process the unfinished hides/
skins into leather products such as belts,
footwear, wallets, and handbags that in
turn are sold within their own country
or re-exported for sale to other
countries. Due to the listing status of the
species under the Act, the United States
cannot be a commercial destination for
Morelet’s crocodile skins and products.
It is currently illegal to import Morelet’s
crocodile skins and products into the
United States, unless the import is for
scientific or enhancement purposes.
In 2010, the Government of Mexico
submitted a proposal to the 15th
Meeting of the CITES Conference of the
Parties (CoP15) to transfer the Morelet’s
crocodile throughout its range to
Appendix II of CITES with a zero quota
for trade in wild specimens because the
Government of Mexico concluded that
the Morelet’s crocodile no longer met
the criteria for inclusion in Appendix I
(CITES 2010a, p. 1). Consistent with a
request from Guatemala (CITES 2010a,
Annex 4, page 25), the Government of
Mexico amended their proposal by
adding the words ‘‘for commercial
purposes’’ after ‘‘with a zero quota for
trade in wild specimens’’. In addition,
the Government of Guatemala opposed
the initial CITES proposal to downlist
the species throughout its range based
on the lack of knowledge of the
population and population trends in
Guatemala, threats to the species from
deforestation and pollution in
Guatemala, and the possibility of illegal,
cross-border trade taking place from
Guatemala. Because of Guatemala’s
concerns, Mexico requested that the
vote be split, with the Mexico and
Belize populations considered
separately from the Guatemala’s
population. The proposal to downlist
the Mexico and Belize populations to
CITES Appendix II with a zero quota for
wild specimens for commercial
purposes was adopted by consensus.
Mexico then withdrew its proposal to
downlist the Guatemala population,
leaving that population in CITES
Appendix I. As a result, only Morelet’s
crocodiles in Mexico and Belize were
transferred to CITES Appendix II.
Morelet’s crocodiles in Guatemala
remain in CITES Appendix I (CITES
2010b, p. 1). The new CITES
designations became effective on June
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23, 2010. Please see the discussion in
the Factor D section, Inadequacy of
Existing Regulatory Mechanisms, for
additional information on the change in
CITES designation for the Morelet’s
crocodile.
According to the 2010 CITES proposal
to transfer the Morelet’s crocodile to
Appendix II, the UNEP–WCMC CITES
Trade Database showed that, until 2007,
the parts and derivatives of the
Morelet’s crocodile most commonly
found in trade were skins, skin pieces
and leather products, although other
products include live specimens, eggs,
bodies, scales, skulls and shoes were
also traded. The largest exporter
between 2001 and 2007 was Mexico
(8,498 skins, 750 skin pieces and 1,193
leather products), followed by Belize
with 116 bodies, 766 eggs and 3,124
specimens for scientific purposes
(exported to the United States). The
major importing countries were Japan
(6,170 skins), United States (3,124
specimens for scientific purposes), Italy
(1,219 skins), the Republic of Korea (560
skins), France (375 skins) and Spain
(162 skins) (CITES 2010a, p. 8).
According to the CITES (CITES 2010a)
proposal to transfer the Morelet’s
crocodile to Appendix II, the national
harvest of animals from closed-cycle
operations authorized in Mexico
amounts to fewer than 2,000 skins per
year since the year 2000. In the period
between 2000 and 2009, 119 CITES
export permits were issued in Mexico
for a total of 12,276 Morelet’s crocodile
skins. However, the total potential
production from closed-cycle captivebreeding operations was about 16,500
individuals and approximately 10,000
skins per year (CITES 2010a, p. 7).
We examined the information on
Mexico’s closed-cycle, captive breeding
operations in Annex 3 of the 2010
CITES proposal. According to the
information provided in the Annex,
there were 19 closed-cycle captivebreeding operations registered as UMAs
for the Morelet’s crocodile in Mexico.
Only four of the 19 UMAs had a captive
population sufficient to support
commercial trade, and only two of these
four could support international
commercial trade—both of which were
registered with CITES. As of 2008, the
captive population in these four UMAs
ranged from 1,237 to 28,673 individuals.
The two UMAs that were not registered
with CITES had the potential to produce
1,100 skins per year for local
commercial trade (CITES 2010a, Annex
3, p. 24). The population levels for the
remaining 15 UMAs were relatively low
by comparison, ranging from six to 576
individuals. Rather than supporting
commercial trade, four of the remaining
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15 UMAs supported exhibition, seven
had no commercial production, three
contributed to the economic support of
the local community, and one was used
for research.
Three of these 19 Mexican captivebreeding operations were also registered
with CITES, and could therefore
commercially trade Morelet’s crocodile
products internationally, as well as
domestically while the species was
listed under Appendix I. However, one
of these CITES-registered captive
breeding operations contains only six
individuals, and is used for exhibition
purposes. Only two of the three CITESregistered captive breeding operations
commercially produce enough Morelet’s
crocodile skins with the annual
production potential for international
trade. These two captive breeding
operations have the potential to produce
an estimated 2,500 skins annually for
international trade (CITES 2010a, pp. 7
and 24, Annex 3). Please see the
discussion in the Factor D section,
Inadequacy of Existing Regulatory
Mechanisms, for additional information
on the three CITES-registered captive
breeding operations.
There are no captive-breeding
facilities in Belize or Guatemala that are
providing specimens or skins for trade,
either domestically or internationally
under the CITES captive-breeding
exception (CITES 2010c). In Belize,
Morelet’s crocodiles are officially
protected from commercial harvest.
Platt and Thorbjarnarson (2000b) found
no evidence of commercial poaching of
Morelet’s crocodiles for skins or meat in
Belize (Platt and Thorbjarnarson 2000b,
p. 27). Reportedly, the species is not
subject to commercial activities in
Guatemala given that Guatemala’s
´
´
Comision Nacional de Areas Protegidas
(CONAP; National Commission on
Protected Areas, also known as the
Guatemalan National Park Service)
prohibits the export and trade in wild
specimens of endangered species
(CITES 2010a, p. 7).
Illegal Trade
According to the 2010 CITES proposal
to transfer the Morelet’s crocodile to
Appendix II, the UNEP–WCMC CITES
Trade Database showed few illegal
movements of parts and derivatives of
the Morelet’s crocodile between 1975
and 2007 from Mexico, Guatemala, and
Belize, with the United States as the
only destination. This suggests that
there is a very low level of illegal trade
and that it is only with the United
States; however, enforcement actions
are not a required field for CITES
Annual Reports. Unlike the United
States, most countries do not specify the
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action taken on imports. Thus, the fact
that illegal trade to the United States is
documented in the WCMC database
does not mean that this is the only
illegal trade in the species. That said,
between 1982 and 2005, items found to
have been ‘‘illegally’’ imported to the
United States from Mexico were mainly
leather products (308) and shoes (419
pairs). It is quite possible that these U.S.
imports derived from legal operations in
Mexico, but were precluded from
import into the U.S. because of the
Morelet’s crocodile’s endangered status
under the Endangered Species Act.
Considering the same caveats
pertaining to WCMC data, there were
eight records illegal trade occurring
from Guatemala (between 1989 and
1997), mainly involving pairs of shoes
(27), and one case in Belize, which
involved the export of 31 eggs in 1995.
˜
Regarding Guatemala, Castaneda-Moya
(1998) stated that illegal capture of the
´
species continued in the Peten region in
that year. However, he admitted that the
volume of such activity had decreased
compared to the situation 25 years
before (CITES 2010a, p. 8).
Recent data available on illegal trade
in the Morelet’s crocodile between 1975
and 2007 showed that the United States
reported illegal imports (UNEP–WCMC
CITES Trade Database 2010a). The data
on illegal imports are based on the
numbers of items that were seized and
confiscated by law enforcement
personnel in both the United States and
in other countries. This information is
not included in CITES annual reports
for each country; the United States is
the exception. The majority of the illegal
Morelet’s crocodile parts and
derivatives confiscated upon arrival into
the United States between 1975 and
2007 came from Mexico (20 skins, 28
handbags, 243 leather items, 419 pairs
of shoes, 3 watch straps, 9 bodies, 10
garments, 2 live animals, and 65 small
leather products). Again, these items
could have come from legal operations
in Mexico, but were a violation at the
time under the Act due to the Morelet’s
crocodile’s endangered status. A
significantly smaller number of illegal
items originated from Guatemala (1
skin, 2 handbags, 1 leather item, 27
pairs of shoes, and 1 body) and Belize
(31 eggs). The majority of the illegal
trade reportedly began in 1985, but
began to decline steadily starting in
2000. Between 2005 and 2007, there
were only several reported illegal
imports of Morelet’s crocodile into the
United States, and these were small
leather products from Mexico (UNEP–
WCMC CITES Trade Database 2010b).
The Government of Mexico’s Federal
Prosecutor for Environmental Protection
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(PROFEPA) has investigated illegal
trade in live animals, presumably for the
pet trade. A potential illegal market in
live animals is under analysis, and
would be expected to involve the
Mexican cities of Guadalajara,
Monterrey, and Mexico City (Mexico
2006, p. 41). Illegal harvest or killing of
individuals perceived as threats to
humans or livestock cannot be
completely precluded, but enforcement
of controls on domestic and
international trade severely limit any
commercial incentives. PROFEPA
performs inspections to prevent
laundering of wild Morelet’s crocodile
specimens and other illegal activities.
There was a declining trend in seizures
of illegal specimens and products
during 1998–2007. According to Mexico
(Mexico 2006, pp. 39–42), 85 specimens
were confiscated in 2003, two in 2004,
80 in 2005, and 14 in 2006 (partial
results). In addition and according to
Paola Mosig, Program officer for the
TRAFFIC World Wildlife Fund in
Mexico, 20 seizures with a total of 48
live specimens, as well as 25 belts and
two wallets were confiscated in 2007
(Mosig 2008, pers. comm.) According to
TRAFFIC, the Wildlife Trade
Monitoring Network, these seizures are
indicative of a strong enforcement
program that deters illegal trade (Mosig
2008, pers. comm.).
Current Trade
In accordance with Article II,
paragraph 2(a) of CITES, and CITES
Resolution Conf. 9.24 (Rev CoP14)
Annex 1, the Government of Mexico
submitted a proposal (CoP15 Prop.8) to
the CoP15 to transfer the Morelet’s
crocodile throughout its range to
Appendix II of CITES with an
annotation requiring a zero quota for
wild specimens that was further
amended by adding the phrase, ‘‘for
commercial purposes’’ (CITES 2010a, p.
1). The Government of Guatemala
opposed Mexico’s CITES proposal as it
pertains to the species in Guatemala,
based on the limited knowledge of the
population and population trends in
Guatemala; the threats to the species
from deforestation and pollution in
Guatemala; and the possibilities of
illegal, cross-border trade taking place
from Guatemala to Mexico. As a result,
the parties to CITES agreed that
Morelet’s crocodiles in Mexico and
Belize should be transferred to CITES
Appendix II but that Morelet’s
crocodiles in Guatemala remain in
CITES Appendix I. (CITES 2010b, p. 2).
The change in CITES status for
Morelet’s crocodiles in Mexico and
Belize became effective on June 23,
2010. Because of the zero quota
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annotation, transferring the Morelet’s
crocodile to CITES Appendix II
precludes the trade of wild specimens
for commercial purposes and therefore
should not create additional pressure on
wild populations in any of the range
states, as long as enforcement remains
effective. As such, international
commercial trade in Morelet’s
crocodiles under CITES is currently
limited to individuals from captivebreeding operations only. However,
once the Appendix-II status went into
effect for Morelet’s crocodiles in Mexico
and Belize, international trade of
Morelet’s crocodiles in Mexico and
Belize under CITES was no longer
limited to facilities that are registered
with the CITES Secretariat pursuant to
the resolution on registration of
operations that breed Appendix-I
animal species for commercial purposes
(Resolution Conf. 12.10 (Rev. CoP15)).
According to the Government of
Mexico’s 2010 CITES proposal, the
current level of international trade in
the Morelet’s crocodile is around 8,600
individuals in 10 years (an average of
860 individuals per year). The Morelet’s
crocodile represents only a small
fraction of the global trade in
crocodilians, far behind the market
leaders: brown spectacled caiman
(Caiman crocodilus fuscus), American
alligator (Alligator mississippiensis),
and Nile crocodile (Crocodilus
niloticus). Current trends in
international trade do not indicate a
threat to the Morelet’s crocodile in the
wild (CITES 2010a, p. 8). In addition,
the Government of Mexico’s proposal to
move the Morelet’s crocodile to CITES
Appendix II allows only individuals
from sources other than wild
populations to be exported and this
provision remains in effect with the zero
quota for wild specimens traded for
commercial purposes. The risk of
laundering of wild specimens through
farms is very low, because the quality of
skins produced in captivity is much
higher than wild-caught skins, and
demand in international trade focuses
on high quality skins (CITES 2010a, pp.
8, 23). It should be noted that there are
a number of CITES-recognized
production methods that are not ‘‘wild’’
and not ‘‘bred in captivity.’’ Mexico or
any other country is free to propose a
change to the annotation at the next CoP
removing this limitation. However,
there is no indication at this time that
a change is imminent.
To see if our results would be
comparable to Mexico’s assessment, we
queried the UNEP–WCMC CITES Trade
Database for the number of Morelet’s
crocodile skins legally exported
between 1998 and 2008 and found
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similar results for the current level of
legal trade cited above by the
Government of Mexico. According to
the UNEP–WCMC CITES Trade
Database, Mexico exported 8,780 skins
between 1998 and 2008, an average of
878 skins per year (UNEP–WCMC
CITES Trade Database 2010b). Two of
the previously CITES-registered captive
breeding operations in Mexico have the
potential to produce 2,500 skins per
year for international trade (CITES
2010a, Annex 3, p. 24), which is more
than adequate to meet the current
demand for legal trade of less than 900
skins per year. If this proposed rule is
finalized, then Morelet’s crocodile
products would be able to be imported
into the United States and the demand
for international trade may increase.
However, we do not believe this
potential increase in international trade
is likely to threaten or endanger wild
Morelet’s crocodiles due to the adequate
supply of captive-bred individuals in
Mexico available for legal international
commercial trade under CITES.
Besides CITES and the Act, no other
international measures control the
cross-border movement of the Morelet’s
crocodile (CITES 2010a, p. 10). If this
proposed rule is finalized and the
prohibitions of the Act are removed,
then Morelet’s crocodile parts and
products could be imported into the
United States for commercial purposes,
provided they do not originate in
Guatemala. However, cross-border
movement of the Morelet’s crocodile
throughout its range would still be
regulated through CITES (Appendix II
for Mexico and Belize; Appendix I in
Guatemala).
Subsistence Harvest
The overharvest for commercial
purposes, rather than subsistence
harvest, was the primary reason for the
Morelet’s crocodile listing under the Act
and under CITES. Although subsistence
harvest has historically had an impact
on some local populations of Morelet’s
crocodiles, these impacts have
diminished over time and do not
currently have a significant impact on
the species as a whole.
Indigenous cultures in Mexico, Belize,
and Guatemala have a long history of
using the Morelet’s crocodile for
subsistence and cultural purposes
(Maimone Celorio et al. 2006, pp. 40–
´
43; Zamudio 2006, pp. 5–8; MendezCabrera and Montiel 2007, p. 132).
Historically, the Maya Indians in
Mexico consumed small quantities of
the eggs and meat of the Morelet’s
crocodile (Maimone Celorio et al. 2006,
pp. 40–43; Zamudio 2006, pp. 5–8;
´
Mendez-Cabrera and Montiel 2007, p.
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132). Hunting and harvest techniques
were based on traditional knowledge by
these people of the behavior and
ecology of the Morelet’s crocodile
´
˜
(Cedeno-Vazquez and Zamudio Acedo
2005, pp. 8–9). More recently (1965–
1980), and in response to a demand by
outside buyers/businessmen, Maya
hunters harvested large quantities of
hides for commercial purposes, but that
activity now has largely been
discontinued (Zamudio et al. 2004, p.
344).
Indigenous and nonindigenous people
in Belize, generally poor farmers, also
engaged in large-scale, commercial
harvest of hides during the previous
century, but that practice was primarily
based on economic instead of cultural
reasons (Hope and Abercrombie 1986, p.
146). Abercrombie et al. (1982, p. 19)
made a distinction between master
hunters in Belize, generally older men
who made extensive forays into the
forest in search of specific game species,
and part-time hunters, generally
younger men who made short-term,
opportunistic outings and often
harvested Morelet’s crocodiles. Among
other uses, the Morelet’s crocodile also
has important roles in indigenous art,
medicine, and religion (Stocker and
˜
Armsey, 1980, p. 740; Cupul-Magana
2003, pp. 45–48), and is used locally for
handicrafts, jewelry, decorations, and
curios (BERDS 2005a, p. 1).
Meerman et al. (2003a, p. 49) noted a
relative scarcity of fish and fish
predators such as crocodiles in the
Sarstoon Temash National Park in
Belize. They suspected that fish
populations are depressed, and that
over-fishing by humans must play a
role. People engaged in fishing along the
Upper Temash River also annually
collect Morelet’s crocodile eggs from
nests located along water channels for
human consumption. In some years, one
or more nests escape discovery so the
eggs are not collected. As a result, baby
crocodiles are subsequently seen that
year. Heavy fishing also reduces the
potential prey base for the Morelet’s
crocodile. The heavy predation on eggs
together with the depletion of the
Morelet’s crocodile’s prey base may be
responsible for the low crocodile count
along the river (Meerman et al. 2003a,
pp. 42, 45).
˜
Castaneda Moya (1998a, p. 521;
1998b, p. 13) listed illegal hunting as a
threat to Morelet’s crocodile in the
´
Peten region of Guatemala, but did not
provide a numerical estimate of the
take. ARCAS, an animal welfare group
in Guatemala, reported the rescue or
recovery of 49 live individuals (about 8
per year), most likely from pet dealers
or private individuals, during the period
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2002–2007 (ARCAS 2002, p. 3; 2003, p.
2; 2004, p. 2; 2005, p. 2; 2006, p. 3;
2007, p. 3). We do not have any
information describing the effect of
these threats on the status of wild
populations in Guatemala.
Although subsistence harvest
continues to affect negatively some local
populations of the Morelet’s crocodile,
the impacts appear to be very small. We
have no evidence that subsistence
harvest is currently or anticipated to
affect significantly the Morelet’s
crocodile throughout its range. The
current range-wide distribution of the
Morelet’s crocodile closely mirrors the
historical range-wide distribution, with
a total population size of approximately
19,400 adults in the three range
countries.
Scientific Research
Scientific research in and of itself also
constitutes a use of the Morelet’s
crocodile. Research in the three range
countries has mainly focused on field
surveys for the occurrence of the
species, relative to abundance and
habitat quality, which do not require
removal of specimens. Research
protocols followed so far have been
those accepted worldwide and do not
involve significant alteration of habitat
or behavior (CITES 2010a, p. 7). Several
scientific research projects on the
Morelet’s crocodile have focused on
field surveys that involve capture,
handling, or invasive techniques to
identify, for example, the species, sex,
or size class of the specimen, as well as
to collect biological specimens or to
attach an identification tag. If conducted
according to standard protocols, these
physical activities pose little risk of
injury or disturbance to the subject
crocodiles. Several studies have also
entailed, for example, night surveys
˜
using bright spotlights (Castaneda Moya
et al. 2000, p. 62), stomach flushing
(Platt et al. 2006, p. 282), collection of
small blood samples (Dever et al. 2002,
p. 1079), or the gathering of nonviable
eggs from nests for contaminants
analyses (Rainwater et al. 2002a, p.
320). None of these studies has cited
any negative effects due to handling or
observation on the Morelet’s crocodile
populations.
All three range countries regulate
scientific research and collection.
According to the UNEP–WCMC CITES
Trade Database, 3,124 specimens were
exported for scientific purposes from
Mexico to the United States. From an
administrative standpoint, a permit at
the state or Federal level regulates the
collection of biological samples for
scientific purposes in Mexico. In
Mexico, the Mexican Endangered
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Species List (NOM–126–SEMARNAT–
2000) regulates the collection of
biological samples from wild species for
scientific use. In addition, the
Governments of Belize and Guatemala
regulate scientific collection and
research. In Belize, this type of export
is subject to strict protocols and
provisions of the Wildlife Protection Act
(CITES 2010a, p. 7).
With the Appendix-II designation for
Morelet’s crocodiles in Mexico and
Belize, individuals or institutions
wishing to import scientific samples
originating from those countries will no
longer be required to obtain a CITES
import permit. However, the CITES
import permit requirement would still
be in effect for Guatemala and CITES
export permits or re-export certificates,
regardless of the country of origin,
would be required. The elimination of
import permits, while continuing the
CITES requirement for export permits
and re-export certificates, may result in
additional scientific collecting and
research to benefit the species while
ensuring that adequate protections for
the species remain in place (see the
Factor D section, Inadequacy of Existing
Regulatory Mechanisms, below).
In conclusion, we are not aware of
any evidence that utilization of the
Morelet’s crocodile for scientific
research purposes poses anything more
than a low risk to the subject
individuals; furthermore, risks at the
population level are probably negligible.
To the contrary, these studies (surveys
and sampling) provide useful
information essential to monitoring the
status and continued health of
individuals as well as populations.
These studies also allow ecotourists in
these countries to work with the
scientific community in the collection
of Morelet’s crocodile data (Volunteers
for International Partnership 2009, pp.
1–4.) This provides ecotourists with an
opportunity to observe the Morelet’s
crocodile in its native habitat and to
gain firsthand knowledge about the
conservation threats that the species is
facing.
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Ranching
Although the Belize-GuatemalaMexico Tri-national Strategy for the
Conservation and Sustainable Use of
Morelet’s Crocodile (see the PostDelisting Monitoring section, below)
includes long-term plans for ranching,
none of the range countries have given
any indication they plan to ranch
Morelet’s crocodiles within the
foreseeable future.
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Summary of Factor B
Thus, while uncontrolled commercial
harvests nearly extirpated the Morelet’s
crocodile, the species has largely
recovered because of being protected
under CITES and the Act in the early
1970s, as well as the implementation of
CITES trade controls by all three range
countries. All of the range countries
currently continue to prohibit harvest of
wild Morelet’s crocodiles.
Illegal international and domestic
trade still occurs, but levels remain low.
Any incidence of illegal killing that may
have occurred has not prevented the
observed population increase of the
species. The potential remains for illegal
cross-border trade, as well as the
laundering of wild specimens through
existing captive-breeding operations in
Mexico, but enforcement in Mexico is
relatively strict. Given the increased
effectiveness of law enforcement
personnel with regard to the
implementation of CITES, the increased
supply of captive-bred Morelet’s
crocodiles in Mexico that are now
available for commercial trade as a
result of the Morelet’s crocodile’s
transfer to CITES Appendix II, and the
increasing awareness of these
regulations by the public, we anticipate
that illegal trade in wild Morelet’s
crocodiles will decrease in the majority
of the species’ range in the foreseeable
future.
The Government of Mexico’s Federal
Prosecutor for Environmental Protection
(PROFEPA) performs inspections to
prevent laundering of wild Morelet’s
crocodile specimens and other illegal
activities. In Belize, the importation and
exportation of wildlife requires a permit
and is subject to strict protocols and
provisions of the Wildlife Protection
Act, Hunting of Scheduled species for
scientific or educational purposes in
Belize also requires a permit. There was
a declining trend in seizures of illegal
specimens and products from 1998–
2007. According to TRAFFIC, these
seizures are indicative of a strong
enforcement program that deters illegal
trade (Mosig 2008, pers. comm.).
Other uses such as scientific research
are either benign or involve relatively
small numbers of Morelet’s crocodiles.
In addition and given the steps that the
Government of Mexico is taking
internally to promote the sustainable
commercial use of Morelet’s crocodiles,
we anticipate that commercial uses will
increase in the foreseeable future,
especially in Mexico, but that captivebred specimens will be used instead of
wild individuals.
In conclusion, we find that the
overutilization for commercial,
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recreational, scientific, or educational
purposes is not a significant factor
affecting the Morelet’s crocodile
throughout its range, both now and for
the foreseeable future.
Factor C. Disease or Predation
Inter-specific interactions, namely
disease and predation, can have
significant impacts on the conservation
status of a species. At the time the
petition was submitted, disease was not
considered a significant conservation
threat to the Morelet’s crocodile.
However, the West Nile Virus (WNV)
has been detected in several Mexican
populations of the Morelet’s crocodile.
´
According to Farfan-Ale et al. (2006, pp.
910–911), six specimens tested negative
´
to the WNV at the Merida Zoo, Yucatan
State, Mexico, during 2003–2004, while
six of seven specimens tested positive to
the WNV at Ciudad del Carmen,
Campeche State, Mexico, in 2004. All
crocodiles, including those not sampled,
showed no signs of illness at the time
of the testing or during the 3 months
´
that followed (Farfan-Ale et al. (2006, p.
911).
In a separate survey conducted during
´
May–October 2005, Hidalgo-Martınez et
al. (2008, p. 80) detected the WNV in six
of seven Morelet’s crocodiles at
´
Zoologico La Venta, Villahermosa,
Tabasco State, Mexico. All animals were
healthy at the time of serum collection,
and none had a history of WNV-like
illness. The presence of WNV antibodies
in animals from those zoos
demonstrated the presence of WNV in
those regions and indicated a potential
risk of infection in animals. The
magnitude of that potential risk,
however, has not been determined. West
Nile Virus was responsible for a
significant number of deaths of farmed
American alligators in the U.S. State of
Georgia during separate outbreaks in
´
2001 and 2002 (Farfan-Ale et al. 2006,
p. 908). However, we do not have any
information to indicate that WNV
causes illness in the Morelet’s crocodile.
The sample sizes in the above studies
on Morelet’s crocodile were small, so
much larger studies are needed.
However, the best available information
does not suggest that WNV is a threat or
likely to become a threat.
Predation on Morelet’s crocodile eggs
and juveniles is a common natural
phenomenon, posing no risk to healthy
populations. They are preyed upon
more frequently at the juvenile stage by
many birds and medium-sized
mammals (CITES 2010a, p. 4). Larger
juveniles and subadults are less
susceptible than small juveniles are to
predation, and only large carnivores
such as jaguars (Panthera onca)
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(Navarro Serment 2004, p. 57) pose a
risk to adult crocodiles. Larger Morelet’s
crocodiles may prey upon the juveniles
of their species. However, this tends to
act as an early factor promoting
population regulation and adult
spacing. Aggressive interactions among
adults seem to be reduced by this
mechanism, especially in populations
with too many adults. In populations
with a steady state of age distribution,
cannibalism usually remains at a
minimum (CONABIO 2005, p. 29). We
are unaware of any unnatural rates of
predation affecting any age class of
Morelet’s crocodile, and we have no
indication that predation will
exacerbate other threats to the species in
the future.
Other interspecific interactions can
also affect the conservation status of a
species. The Morelet’s crocodile and the
American crocodile co-occur and may
compete with each other for resources
along the freshwater-saltwater interface
in coastal Mexico and Belize. Platt and
Thorbjarnarson (2000a, p. 16; 2000b, pp.
24–26) reported relatively higher
frequency of encounter rates for the
Morelet’s crocodile at alluvial and
nonalluvial lagoons, mangrove forest,
and rivers and creeks, collectively
characterized as inland sites, while the
American crocodile was relatively more
abundant in offshore cays and the
Turneffe Atoll. These differences were
attributed to the smaller body size of the
Morelet’s crocodile, as well as past
exploitation patterns by hunters and
subsequent niche expansion by this
species (Platt and Thorbjarnarson
2000b, p. 26). There was no indication,
however, that interspecific competition
between the Morelet’s and the American
crocodiles was a serious conservation
problem.
Parasites have been also reported for
the Morelet’s crocodile, but have not
been identified as a conservation threat.
In Mexico, trematodes (parasitic
flatworms commonly called flukes) and
nematodes (unsegmented worms
commonly called roundworms) have
been reported (Moravec and Vargas´
Vazquez 1998, p. 499; Moravec 2001, p.
47) from the Yucatan Peninsula, but
health problems with the crocodile
hosts were not noted. Rainwater et al.
(2001a, p. 836) reported ticks
(Amblyomma dissimile and
Amblyomma sp.), but noted that
parasitism by ticks on the Morelet’s
crocodile was rare in Belize and
elsewhere.
Padilla Paz (2008, p. vi) characterized
hematology, body index, and external
injuries for 103 Morelet’s crocodiles
from the northern wetlands of
Campeche State, Mexico. These
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variables were used to characterize the
health of the animals. Captive Morelet’s
crocodiles evaluated for that study
presented significantly more injuries
than did wild individuals. Parasitism
with nematodes (Paratrichosoma
recurvum) was greater in wild
crocodiles than in captive individuals.
No serious health issues were identified
in individuals in either group (Padilla
Paz 2008, pp. 67–68).
Individual Morelet’s crocodiles can
also have physical issues that can affect
their well-being. Rainwater et al.
(2001b, pp. 125–127) reported two
individuals among 642 Morelet’s
crocodiles captured in Belize with a
missing forelimb. Known in the
technical literature as ectromelia, this
condition was probably the result of
congenital defects and not due to an
injury. Both individuals otherwise
appeared to be in good condition.
Summary of Factor C
While the full impact of the WNV on
the Morelet’s crocodile has yet to be
determined, there is no indication at
present that WNV poses a threat to the
species, and other interspecific
interactions do not appear to be
adversely affecting the Morelet’s
crocodile. In conclusion, we find that
disease or predation is not a significant
factor affecting the Morelet’s crocodile
throughout its range, both now and for
the foreseeable future.
Factor D. Inadequacy of Existing
Regulatory Mechanisms
Convention on International Trade in
Endangered Species of Wild Fauna and
Flora
The Convention on International
Trade in Endangered Species of Wild
Fauna and Flora (CITES, the
Convention, or Treaty) is an
international agreement between
member governments to ensure that the
international trade in plants and
wildlife does not threaten the species’
survival. It provides varying degrees of
protection to more than 30,000 species
of animals and plants, whether they are
traded as live specimens, parts or
products. Countries that have agreed to
be bound by the Convention (that have
‘‘joined’’ CITES) are known as Parties.
Although CITES is legally binding on
the Parties, it does not take the place of
national laws. Rather, it provides a
framework to be respected by each
Party, which has to adopt its own
domestic legislation to ensure that
CITES is implemented at the national
level. For many years, CITES has been
among the international conservation
agreements with the largest
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membership, with now 175 Parties
(https://www.CITES.org).
CITES works by subjecting
international trade in specimens of
selected species to certain controls.
Trade includes any movement into or
out of a country and is not limited to
commercial movement. All import,
export, re-export, and ‘‘introduction
from the sea’’ of species covered by the
Convention have to be authorized
through a permitting system. The
species covered by CITES are listed in
three Appendices, according to the
degree of protection they need (CITES
2009c).
Appendix I include species
threatened with extinction that are or
may be affected by trade. Trade in
specimens of these species is permitted
only in exceptional circumstances.
Appendix II includes species not
necessarily threatened with extinction,
but in which trade must be controlled
in order to avoid utilization
incompatible with their survival.
Appendix III includes species that have
been unilaterally listed by a Party to
assist in the implementation of the
listing Party’s national legislation to
conserve and monitor trade in the listed
species. The Conference of the Parties
(CoP), which is the decision-making
body of the Convention and comprises
all its member countries, has agreed on
a set of biological and trade criteria to
help determine whether a species
should be included in Appendices I or
II (Since Appendix-III listings are a
unilateral decision, Parties do not need
to abide by the same biological and
trade criteria adopted by the Parties.). At
each regular meeting of the CoP, Parties
submit proposals based on those criteria
to amend these two Appendices to add,
remove, or reclassify species (such as
the Government of Mexico’s 2010
proposal to transfer the Morelet’s
crocodile from Appendix I to Appendix
II). Parties discuss these amendment
proposals during the CoP, and then they
are submitted for adoption by the
Parties (https://www.cites.org).
A specimen of a CITES-listed species
may be imported into or exported (or reexported) from a Party only if the
appropriate permit or certificate has
been obtained prior to the international
trade and presented for clearance at the
port of entry or exit.
Regulation of Trade in Appendix-I
Specimens
Both an export permit or re-export
certificate must be issued by the country
of export and an import permit from the
country of import must be obtained
prior to international trade for
Appendix-I species. An export permit
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may only be issued if the country of
export determines that the export will
not be detrimental to the survival of the
species, the specimen was legally
obtained according to the animal and
plant protection laws in the country of
export, live animals or plants are
prepared and shipped for export to
minimize any risk of injury, damage to
health, or cruel treatment, and an
import permit has been granted by the
importing country. Likewise, the
requirements for a re-export certificate
are that the country of re-export
determines that the specimen was
imported into their country in
accordance with CITES, that live
animals or plants are prepared and
shipped for re-export to minimize any
risk of injury, damage to health, or cruel
treatment, and an import permit has
been granted.
Issuance of import permits for
Appendix-I species will also need a
determination from the country of
import that the import will not be for
purposes that are detrimental to the
survival of the species, the proposed
recipient of live animals or plants is
suitably equipped to house and care for
them, and the purpose of the import is
not for primarily commercial purposes.
Thus, with few exceptions, Appendix-I
species cannot be traded for commercial
purposes.
Regulation of Trade in Appendix-II
Specimens
In contrast to the trade requirements
for an Appendix-I species, CITES does
not require an import permit from the
destination country as a condition for
the export and re-export of an
Appendix-II species, unless it is
required by the destination country’s
national law. However, an export permit
or re-export certificate is required from
the exporting country prior to the
international trade taking place. An
export permit may only be issued for
Appendix-II species if the country of
export determines that: (1) The export
will not be detrimental to the survival
of the species; (2) the specimen was
legally obtained according to the animal
and plant protection laws in the country
of export; and (3) live animals or plants
are prepared and shipped for export to
minimize any risk of injury, damage to
health, or cruel treatment.
A re-export certificate may only be
issued for Appendix-II species if the
country of re-export determines that: (1)
The specimen was imported into their
country in accordance with CITES and
(2) live animals or plants are prepared
and shipped for re-export to minimize
any risk of injury, damage to health, or
cruel treatment.
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Parties to CITES are required to
monitor both the export permits granted
and the actual exports for Appendix II
species. If a Party determines that the
export of an Appendix-II species should
be limited in order to maintain that
species throughout its range at a level
consistent with its role in the
ecosystems in which it occurs and well
above the level at which the species
might become eligible for inclusion as
an Appendix-I species, then that Party
must take suitable measures to limit the
number of export permits granted for
that species (CITES article IV, paragraph
3).
CITES Registered Captive-Breeding
Operations
Prior to the Morelet’s crocodile in
Mexico and Belize being downlisted to
Appendix II, it could be treated as an
Appendix II species and internationally
traded commercially only if the
specimen originated from a captivebreeding operation registered with the
CITES Secretariat in accordance with
CITES Resolution Conf. 12.10 (Rev.
CoP15) ‘‘Guidelines for a procedure to
register and monitor operations that
breed Appendix-I animal species for
commercial purposes.’’ These captivebreeding operations may only be
registered if specimens produced by that
operation qualify as ‘bred in captivity’
according to the provisions of
Resolution Conf. 10.16 (Rev.). To qualify
as bred in captivity, specimens must be
born in a controlled environment where
the parents mated. In addition, breeding
stock must be established in accordance
with the provisions of CITES and
relevant national laws and in a manner
not detrimental to the survival of the
species in the wild. Breeding stock must
also be maintained without the
introduction of specimens from the
wild, except for the occasional addition
of animals, eggs or gametes meeting
certain requirements. The breeding
stock must have produced offspring of
second generation (F2) in a controlled
environment or be able to demonstrate
that it is capable of reliably producing
second-generation offspring in a
controlled environment. Resolution
Conf. 12.10 (Rev. CoP15) defines the
term ‘‘bred in captivity for commercial
purposes’’ as ‘‘any specimen of an
animal bred to obtain economic benefit,
including profit, whether in cash or
kind where the purpose is directed
toward sale, exchange, or provision of a
service or any other form of economic
use or benefit’’. Countries operating
CITES-registered operations must
ensure that the operation ‘‘will make a
continuing meaningful contribution
according to the conservation needs of
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the species’’ (CITES 2007b, pp. 1–2).
Under the exception in the Treaty and
Resolution Conf. 12.10 (Rev. CoP15),
specimens of Appendix-I species
originating from CITES-registered
captive-breeding operations can be
traded for commercial purposes, and
shipments only need to be accompanied
by an export permit issued by the
exporting country. The importer is not
required to obtain an import permit
because these specimens are treated as
CITES Appendix II. Countries that are
Parties to CITES should restrict their
imports of Appendix-I captive-bred
specimens to those coming only from
CITES-registered operations. Additional
information on CITES-registered
operations can be found on the CITES
Web site at https://www.cites.org/eng/
resources/registers.shtml.
Prior to the downlisting of the species
in Mexico and Belize, three CITESregistered operations for Morelet’s
crocodiles were located in Mexico.
These facilities, while no longer
registered with the CITES Secretariat,
are still in operation (CITES 2010a, p.
24, Annex 3). The names of these
operations are:
(1) Cocodrilos Mexicanos (established
in 1989; (former) registration number A–
MX–501) in Culiacan, Sinaloa State. In
2008, this operation contained 28,673
captive Morelet’s crocodiles for
commercial production (CITES 2010a,
p. 24, Annex 3).
(2) Industrias Moreletii (established in
1993; (former) registration number A–
MX–502) in Villahermosa, Tabasco
State. In 2008, this operation contained
1,237 captive Morelet’s crocodiles for
commercial production (CITES 2010a,
p. 24, Annex 3).
(3) Cocodrilos de Chiapas (established
in 1989; (former) registration number A–
MX–503) in Tapachula, Chiapas State.
In 2008, this operation contained six
captive Morelet’s crocodiles for
exhibition purposes (CITES 2010a, p.
24, Annex 3).
When the CITES Appendix-II
designation became effective on June 23,
2010, for Morelet’s crocodiles in Mexico
and Belize, commercial international
trade in captive Morelet’s crocodiles
was no longer limited to crocodiles
originating from the three operations
that were registered with the CITES
Secretariat. However, with the
annotated listing, no export of wildcaught specimens for commercial
purposes is allowed. Thus, any
commercial export will continue to
come from sources other than wild
populations. There are currently 19
closed-cycle captive-breeding
operations registered with the
Government of Mexico as UMAs for the
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production of Morelet’s crocodile in
Mexico. Under Mexican law, UMAs
registered with the Government of
Mexico must be closed-cycle and prove
that they can produce individuals
beyond the F2 generation (UMAs are
described more fully below). Only four
of the 19 UMAs have a captive
population sufficiently large to support
commercial trade, and only two of these
four UMAs currently support
international commercial trade—
(Cocodrilos Mexicanos and Industrias
Moreletii) (CITES 2010a, Annex 3, p.
24). Importing Morelet’s crocodiles from
Mexican captive-breeding operations no
longer requires a CITES import permit
because a CITES import permit is not
required for Appendix II species.
However, a CITES export permit or reexport certificate is still required.
Although the two remaining UMAs
capable of supporting trade (Cacahuatal
in Veracruz State and Punta del Este in
Campeche State) currently do not
contain enough Morelet’s crocodiles to
support international commercial trade,
they do have enough potential annual
production to produce enough skins to
support local commercial trade (CITES
2010a, Annex 3, p. 24).
Since the Morelet’s crocodile in
Guatemala is listed as an Appendix-I
species under CITES, the only way that
Morelet’s crocodiles and their parts and
products from Guatemala could legally
be traded commercially in international
trade is if a captive-breeding operation
were to be registered with the CITES
Secretariat. However, since Guatemala
does not currently have any captive
breeding operations that are registered
with the CITES Secretariat, the
commercial international trade in
Morelet’s crocodile products from
Guatemala remains restricted.
However, under the current listing of
the species under the Act, it remains
illegal to import Morelet’s crocodiles or
their parts or products into the United
States, regardless of the source, unless
the purpose of the import is for
scientific research or enhancement of
propagation or survival of the species. If
this proposed rule is finalized and the
prohibitions of the Act are removed,
Morelet’s crocodile parts and products
originating from sources other than wild
populations from Mexico and Belize
could be imported into the United
States for commercial purposes, as long
as the required CITES export permit or
re-export certificate has been granted.
As discussed earlier, however, an export
permit will not be granted unless the
exporting country finds that the export
will not be detrimental to the species
and the specimen was lawfully
acquired.
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Mexico’s Proposal To Transfer the
Morelet’s Crocodile to CITES Appendix
II
At the 2008 CITES Animals
Committee meeting, the Government of
Mexico submitted for comment and
review a draft proposal to transfer
Mexico’s population of Morelet’s
crocodile from Appendix I to Appendix
II based on Mexico’s belief that the
Morelet’s crocodile no longer met the
criteria for inclusion in Appendix I
(CITES 2008a, pp. 1–28; CITES 2008a, p.
32). Committee members were generally
favorable of the proposal, but had
several technical questions and
suggestions. The Government of Mexico
subsequently revised their 2008
proposal and formally submitted a 2010
CITES proposal for consideration at
CoP15, held in March 2010 in Doha,
Qatar (Government of Mexico 2010).
The 2010 proposal was to transfer the
Morelet’s crocodile throughout its range
to Appendix II (CoP15 Prop. 8). The
CITES Secretariat reviewed the proposal
and agreed that the Morelet’s crocodile
no longer met the biological criteria for
an Appendix-I species and
recommended that the proposal be
adopted.
The Government of Mexico’s 2010
CITES proposal recommended
transferring the Morelet’s crocodile from
Appendix I to Appendix II because the
species no longer met the criteria for
inclusion in Appendix I. Under the
2010 proposal, the transfer to Appendix
II applied to all three range countries.
The 2010 proposal included an
annotation establishing a zero quota for
wild specimens. The zero quota would
prohibit any international trade in wild
specimens within the context of CITES,
thereby limiting the trade to Morelet’s
crocodile and its products to those
originating from sources other than wild
specimens. Although the BelizeGuatemala-Mexico Tri-national Strategy
for the Conservation and Sustainable
Use of Morelet’s Crocodile (see the PostDelisting Monitoring section, below)
includes long-term plans for ranching,
none of the range countries have
indicated they plan to ranch Morelet’s
crocodiles within the foreseeable future.
The Government of Mexico consulted
with the Governments of Belize and
Guatemala on their 2010 CITES
proposal. The Government of Belize
supported the proposal, but did not
provide documents to the CITES
Secretariat to indicate their official
support. According to the Government
of Mexico’s 2010 CITES proposal, the
Government of Guatemala supported the
proposal in part, but recommended
transferring only the Mexican
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population of Morelet’s crocodile in
captive-breeding operations to
Appendix II, with a zero quota for wild
specimens traded for commercial
purposes. In a letter from Guatemala’s
Consejo Nacional de Areas Protegidas to
the Ambassador of Mexico dated 5 June
2009 (CITES 2010a, Annex 4, p. 25), the
Government of Guatemala indicated that
it did not support the Government of
Mexico’s 2010 CITES proposal as
written. They recommended verifying
that moving captive Morelet’s crocodiles
in Mexico to Appendix II would not put
wild Morelet’s crocodiles in Mexico at
risk. They supported Mexico’s transfer
of captive-bred populations of Morelet’s
crocodiles from Appendix I to
Appendix II provided the parties ensure
the following:
• They verify that wild populations of
Morelet’s crocodiles in Mexico will not
be at risk as they are moved from
Appendix I to II;
• If Mexico’s proposal at CoP15 is
approved, then measures should be put
in place for strict monitoring and
enforcement on the Mexico-Guatemala
border;
• That the marking of live animals be
done by methods that cannot be falsified
and that skins be tagged in accordance
with CITES to maintain chain of
custody;
• That the tagging methods for
Mexican populations of Morelet’s
crocodile be widely circulated to range
countries and those countries importing
parts and products as well as live
specimens.
Under Guatemala’s recommended
scenario, Morelet’s crocodiles in
Mexico, and Belize would be in
Appendix II, with a zero quota for wild
specimens traded for commercial
purposes and all Morelet’s crocodiles in
Guatemala would remain on Appendix
I (CITES 2010a, pp. 12, 25–26). The
Appendix-II designation became
effective on June 23, 2010. As a result,
Morelet’s crocodiles and their products
from Mexico and Belize from sources
other than wild populations are now
allowed to enter international trade for
commercial purposes under CITES.
They are, however, not currently able to
enter the United States market because
the Act’s prohibitions remain in effect.
The international commercial trade in
all wild Morelet’s crocodiles remains
restricted.
At this time, the Government of
Mexico intends to export products
derived from Morelet’s crocodiles raised
in its captive-breeding operations that
are registered with the Government of
Mexico as UMAs, and that have a
proven track record of producing
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offspring beyond the F2 generation
(CITES 2008, p. 23; CITES 2010a, p. 9).
Now that the Morelet’s crocodile in
Mexico and Belize is transferred to
CITES Appendix II with an annotation
providing a zero quota for wild
specimens traded for commercial
purposes, if this proposed delisting rule
under the Act is finalized, then products
originating from any captive-breeding
operations in Mexico (and Belize, if any)
could be imported into the United
States. In addition, if this proposed
delisting rule under the Act is finalized,
then Morelet’s crocodile products
manufactured in other countries could
also be re-exported into the United
States if those skins originated in
Mexico or Belize and were not derived
from wild populations. Live Morelet’s
crocodiles and parts or products
originating from Guatemala will remain
in CITES Appendix I, with its associated
trade restrictions remaining in place.
Through Resolution Conf. 8.4 (Rev.
CoP15) the Parties to CITES have
adopted a process, the National
Legislation Project, to evaluate whether
Parties have adequate domestic
legislation to successfully implement
the Treaty. In reviewing a country’s
national legislation, the Secretariat
considers whether a Party’s domestic
laws designate the responsible Scientific
and Management authorities, prohibit
trade in violation of the Convention,
have penalty provisions in place for
illegal trade, and provide for seizure of
specimens that were illegally traded or
possessed.
While both Guatemala and Mexico’s
legislation have been determined to be
sufficient to properly implement the
Treaty, Belize’s national legislation was
considered lacking. As part of the
National Legislative Project, Belize has
submitted a plan to revise their
legislation to the Secretariat in March
2010, but as of this proposed rule, have
not officially enacted any revised
legislation (CITES 2010e). Although a
trade suspension was put in place for
Belize for one orchid species,
Myrmecophila tibicinis, the suspension
was in relation to the Review of
Significant Trade in Specimens of
Appendix II species (CITES 2010d) and
not due to Belize’s current legislation
implementing CITES. If this proposed
rule is finalized, CITES will continue to
protect the Morelet’s crocodile
throughout its range by regulating
international trade. However, as part of
this proposed rule, we are requesting
any information on Belize’s efforts to
enact national legislation and/or their
efforts to ensure their compliance with
CITES. We will continue to monitor
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Belize’s progress between the proposed
and final rules.
All three countries also have
protected-species and protected-areas
legislation under the jurisdiction of
specific ministries or departments. The
three range countries have an extensive
regulatory framework to control
activities with respect to the Morelet’s
crocodile and its habitat. Mexico is
unique among the three range countries
in that the Government of Mexico also
has legislation regulating captivebreeding operations.
Mexico
The Government of Mexico has a
strict and comprehensive legal
framework to regulate the conservation
and sustainable use of the Morelet’s
crocodile in Mexico:
(1) Ley General de Equilibrio
´
´
Ecologico y Proteccion al Ambiente
(LGEEPA; General Ecological
Equilibrium and Environmental
Protection Law)—This is the primary
Mexican law for environmental matters
and is the principal legal instrument
that regulates the Morelet’s crocodile in
Mexico (CONABIO 2005, Annex 3, p. 1).
Passed in 1988, this law applies to and
integrates the three levels of government
within the context of natural resources:
Federal, state, and municipal. With
regard to trade in wildlife species,
including the Morelet’s crocodile, the
LGEEPA contains the basis to regulate
all activities, including importation,
exportation, seizures, sustainable use,
violations, fines, animal welfare, and
legal possession. While forty-five
articles within the Mexican LGEEPA
deal with environmental contamination
(CONABIO 2005, Annex 3, p. 1), we are
not aware of any specific provisions and
their relevance to Morelet’s crocodile.
(2) Ley General de Vida Silvestre
(LGVS: General Wildlife Law)—Passed
in 2000, this law regulates the use,
conservation, and management of
domestic wild fauna and flora and their
habitat (CONABIO 2005, Annex 3, pp.
1–2). This law is based on the principle
of sustainable use. Any activity with
regard to wild fauna and flora must
comply with certain requirements: The
activity must be supported by an
approved management plan; the
quantity to be harvested must be less
than natural recruitment (replacement);
and the harvest must not have negative
impacts on the wild populations, their
habitat, or biological activities. With
regard to the Morelet’s crocodile,
harvest of wild populations is not
permitted, and harvest under this law
would only be permitted for specimens
obtained through closed-cycle, captivebreeding operations which have
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programs that contribute to the
development of wild populations
(CITES 2010a, p. 9).
According to the LGVS, alien
specimens or populations are those
occurring outside their natural range
(such as the Morelet’s crocodiles found
on the Pacific coast of Mexico),
including hybrids. Such specimens or
populations can only be managed in
captivity, and with prior approval. A
management plan must be in place with
established security and contingency
measures to avoid any negative effects
on the conservation of wild native
specimens and populations or their
habitat. LGVS establishes management,
control, and remediation measures for
individuals or populations considered
harmful. Measures may consist of
capture/collection for the development
of recovery, restocking and
reintroduction projects; for research or
environmental education activities; for
relocation of specimens (subject to prior
evaluation of the destination habitat and
condition of the individuals); for
elimination or eradication of
individuals/populations; or of actions or
devices to keep the individuals away,
disperse them, make access difficult or
reduce the damage they cause (CITES
2010a, p. 9).
´
(3) Programa de Conservacion de la
´
Vida Silvestre y Diversificacion
Productiva en el Sector Rural (Program
for Wildlife Conservation and
Productive Diversification of the Rural
Sector)—Launched in 2000, this
program defines the conceptual,
strategic, legal and administrative
framework that governs any initiative
for the conservation and use of wild
species (CITES 2010a, p. 8). The goal of
this program is to establish incentives
for private and public initiatives that
favor natural resources conservation, as
well as provide economic opportunities
for private entities for the sustainable
use of these resources (CONABIO 2005,
Annex 3, pp. 2–3). Based on a biological
evaluation of the species, this program
promotes the use and conservation of
priority species of plants and animals,
including the establishment of wildlife
production units and technical advisory
committees such as the COMACROM
´ ´
(Subcomite Tecnico Consultivo para la
´
Conservacion, Manejo y
Aprovechamiento Sustentable de los
´
Crocodylia en Mexico; Technical
Advisory Subcommittee for the
Conservation, Management and
Sustainable Use of the Crocodilians in
Mexico) in the case of the Morelet’s
crocodile. Created by the Government of
Mexico in 1999, COMACROM includes
scientists, technicians, NGOs,
producers, authorities and other
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stakeholders. It participates in meetings
of the IUCN Crocodile Specialist Group
(CSG) and contributes publications to
the CSG (CITES 2010a, p. 8).
(4) Norma Oficial Mexicana NOM–
059–SEMARNAT–2001—Passed in
2001, this regulation provides legal
protection to domestic endangered
species of fauna and flora and provides
a mechanism to evaluate extinction
risks (CONABIO 2005, Annex 3, p. 3).
´
´
The Metodo de Evaluacion de Riesgo de
´
Extincion de Especies Silvestres de
´
Mexico (MER; Method to Evaluate
Wildlife Extinction Risks in Mexico),
one of the parts of this regulation, has
four categories of risk: Probably extinct
in the wild, in peril, threatened, and
subject to special protection. The
Morelet’s crocodile is included in the
category ‘‘subject to special protection.’’
This regulation defines the category
‘‘subject to special protection’’ as ‘‘those
species or populations that might find
themselves threatened by factors that
adversely affect their viability, thus
determining the need to promote
conservation or recovery and the
recovery and conservation of associated
species populations. (This category may
include lower risk categories of the
IUCN classification).’’
Although the Government of Mexico
no longer classifies the Morelet’s
crocodile as ‘‘Endangered’’ or
‘‘Threatened,’’ classification as ‘‘subject
to special protection’’ under Mexican
Official Law NOM–059–SEMARNAT–
2001 allows legal protection at the
national level (CITES 2010a, p. 9).
Including the Morelet’s crocodile in this
category allows the Government of
Mexico to make sure it still meets the
conservation needs of important species
from both a biologically and socioeconomic standpoint before the species
can be considered as threatened or
endangered. The petitioners
recommended keeping the Morelet’s
crocodile in this category of ‘‘subject to
special protection’’ to maintain existing
measures of conservation, technical
supervision, monitoring and
enforcement in order to avoid the
species’ having a higher risk category in
the future (CONABIO 2005, p. 4 and
Annex 2, p. 5).
(5) Norma Oficial Mexicana NOM–
126–SEMARNAT–2000—Passed in
2000, this regulation oversees scientific
research and collection by individual
domestic and foreign researchers, as
well as by institutions (CONABIO 2005,
Annex 3, p. 3). If a species is also
regulated under CITES, the appropriate
permit or certificate must be obtained
under this regulation. Scientific
research or collections involving the
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Morelet’s crocodile are regulated under
these provisions.
(6) Sistema de Unidades de Manejo
´
para la Conservacion de la Vida
Silvestre (SUMA; Wildlife Conservation
Management and Administration Unit
System)—In 1997, the Government of
Mexico established a system for
registering, supervising, and enforcing
UMAs (Unidad de Manejo y
´
Administracion; Conservation
Management and Administrative Units)
for intensive reproduction of
economically valuable natural
resources, including captive farming of
Morelet’s crocodiles (CONABIO 2005,
Annex 3, pp. 3–5). The goal of this
regulation was to ensure that
biodiversity conservation be considered
within the context of the production
and socioeconomic needs of the
country. This system combined a broad
range of entities or facilities (‘‘units’’)
under a single administrative program,
including zoological and botanical
gardens, greenhouses, and animal
breeding centers. Through these units,
the Government of Mexico promotes
natural resources uses that are
responsible and planned. Extensive and
intensive captive-breeding units for the
Morelet’s crocodile are covered under
this system. In exchange for the right to
harvest the Morelet’s crocodile under
controlled conditions, closed-cycle
captive-breeding unit operators are
required to develop and implement an
approved management plan for the site,
as well as to conserve the species’
habitat and other species that use that
habitat. Strict animal husbandry
practices and welfare considerations are
required under these plans.
Legal registration of approved UMAs
requires proof of captive production
beyond the F2 generation (CITES 2010a,
p. 9). For intensive UMAs, such as
captive-breeding operations in Mexico,
the Government of Mexico requires the
UMAs to submit regular reports that
must include information on births and
deaths, number and identification of
traded specimens, and management
activities (CITES 2010a, p. 10).
The Government of Mexico uses three
methods to mark live Morelet’s
crocodiles registered with the Wildlife
Division through the corresponding
inventories of UMAs. The first method
is interdigital staples on the feet. The
second method is the traditional method
of cutting notches in the tail scales and
is only used by some operations (CITES
2010a, p. 10). These marks are registered
with the Government of Mexico. The
third method is the Universal Tagging
System required by CITES for the export
of skins (Resolution Conf. 11.12 (Rev.
CoP15), which consists of a plastic
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security tag with the UMA registration
number, the species code, a serial
number, and the year of production or
harvest. Any application for a CITES
export permit must include the number
of the authorized specimen based on the
interdigital tag and the skin’s plastic
security tag and is used to track skins
and other products (CITES 2010a, p. 10).
Approximately 50 UMAs have been
registered for rearing Morelet’s
crocodiles in Mexico since the 1980s,
primarily for domestic commerce.
Nineteen of them are still actively
managing the species and three were
registered with the CITES Secretariat
when the species in Mexico was
included in Appendix I (CITES 2010a,
p. 11). Only five of the nineteen UMAs
have the potential for annual
commercial production of products
made from Morelet’s crocodile (CITES
2010a, p. 24).
´
(7) Sistema Nacional de Areas
Naturales Protegidas (SINANP; National
System of Protected Natural Areas)—
Passed in 2000, this system is made up
of parcels identified as Protected
Natural Areas (CONABIO 2005, Annex
3, p. 5). These Protected Natural Areas
are created by Presidential decree and
the activities on them are regulated
under the LGEEPA, which requires that
the Protected Natural Areas receive
special protection for conservation,
restoration and development activities.
The National Commission of Natural
Protected Areas (CONANP), a
decentralized organ of the Government
of Mexico’s Ministry of Environment
and Natural Resources (SEMARNAT),
currently administers 173 federal
natural areas representing more than
62,396,392 ac (25,250,963 ha). These
natural areas are categorized as:
Biosphere Reserves, National Parks,
Natural Monuments, Areas of Natural
Resource Protection, Areas of Protection
of Flora and Fauna, and Sanctuaries.
These areas are protected under
Mexican law because they contain key
or representative ecosystems or species,
or ecosystems or species that are at risk
and require strict control. Many
ecosystems or species, including the
Morelet’s crocodile, are protected under
this system. According to the
Government of Mexico, SINANP
includes at least 12 protected areas
occupied by Morelet’s crocodile,
covering an estimated 13 percent of the
species’ geographic range (CONABIO
2005, p. 30).
´
(8) Codigo Penal Federal (Federal
Penal Code)—The code contains a
special section for environmental crimes
(CONABIO 2005, Annex 3, pp. 5–6).
These penalties apply to those who
commit crimes against plants or
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animals, as well as to individuals who
illegally use or commercialize regulated
species without authorization. These
penalties apply to crimes involving the
Morelet’s crocodiles.
In order to implement and enforce the
laws and regulations mentioned above,
SEMARNAT created the office of the
´
´
Procuradurıa Federal de Proteccion al
Ambiente (PROFEPA; Federal
Prosecutor for Environmental
Protection) and the Programa para la
´
Inspeccion y Vigilancia en Puertos,
Aeropuertos y Fronteras (Ports,
Airports, and Borders Inspection and
Enforcement Program) (CONABIO 2005,
Annex 3, p. 6). Under this program,
imports and exports for key products
regulated by SEMARNAT are inspected
at 65 points of entry and exit to prevent
laundering. Morelet’s crocodile
products are regulated under this
program. PROFEPA implements the
Environmental Inspection Program at
ports, airports, and borders, and the
Wildlife Inspection Program, monitoring
all stages of the use of wild species and
ensuring their protection. Inspection
and enforcement programs make these
Mexican laws and regulations more
effective, especially at airports and
border ports of entry and exit. Specific
actions include the verification of crossborder movements in compliance with
CITES and other international
agreements in coordination with
customs authorities; inspection of areas
of wildlife harvest, stockpiling,
distribution, and sale; surveillance of
areas of wildlife distribution and
harvest; and special operations in areas
of wildlife harvest, stockpiling,
distribution and sale, in coordination
with public law enforcement and
judicial authorities (Govt. of Mexico
2010, p. 11). Mexico has implemented
several programs to prevent and combat
illegal harvest, including the System of
Wildlife Management Units (SUMA)
which is based on six key elements: (1)
Registration with the Wildlife Division
´
(DGVS Direccion General de Vida
Silvestre- SEMARNAT, CITES
Management Authority); (2) proper
habitat management; (3) monitoring of
wild populations of the species
harvested; (4) controlled harvest
(including periodic reports and
inventories on each UMA); (5)
management plan approved and
registered with the Wildlife Division;
and (6) certificate of production and
market/tagging methods. SEMARNAT
conducts random inspections of UMAs
and, if any issues are detected in the
management plan, carries out
population studies, including sampling
activities and species inventories and
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produces periodic reports on these
findings (CITES 2010a, p. 10).
We do not have any information on
whether the Mexican legal framework
specifically authorizes subsistence
hunting or cultural use of the Morelet’s
crocodile, or on the current level of
enforcement, or whether the
enforcement is considered adequate.
Belize
The Government of Belize also has a
legal framework that regulates the
conservation and sustainable use of the
Morelet’s crocodile, along with other
species of birds, mammals, and reptiles
(collectively known as Scheduled
species). In general terms, the Wildlife
Protection Act prohibits illegal harvest
and export in Belize (Government of
Belize 2000 p. 7–9). The Forestry
Department, within the Ministry of
Natural Resources and the Environment,
is the relevant government agency with
respect to the Morelet’s crocodile.
Under this legislation, the Game
Warden controls hunting of these
species. Certain activities are prohibited
and a license is required. For example,
hunting of the Morelet’s crocodile is
prohibited. Importation and exportation
of wildlife is subject to strict protocols
and provisions of the Wildlife
Protection Act and requires a permit.
Hunting of certain species for scientific
or educational purposes also requires a
permit. The legislation also identifies
offenses and penalties.
In addition to the Wildlife Protection
Act, the Government of Belize is in the
process of developing and
implementing a National List of Critical
Species (Meerman 2005a, pp. 1–8;
Meerman 2005b, p. 38). This list is
based, in part, on the procedures used
by IUCN Red List of Threatened
Animals (see IUCN 2001, version 3.1, 35
pp.). Within the context of the Belize
Protected Areas Policy and System Plan,
this list will serve as a basis for the
Belize Red Data List. According to the
2005 list (Meerman 2005a, p. 8), the
Morelet’s crocodile is categorized as
‘‘CD’’ (Conservation Dependant) in
Belize due to the following factors:
small range, hunted, economic
importance, charismatic species
drawing national and international
attention, and persecuted as perceived
pest. Under the 2005 list, Conservation
Dependent species are taxa that are the
focus of a continuing taxon-specific or
habitat-specific conservation program
for the taxon in question, the cessation
of which would result in the taxon
qualifying for one of the threatened
categories on the list within five years
(Meerman 2005a, p. 3).
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These laws and regulations provide
legal protection to the Morelet’s
crocodile in Belize. We have no
information on whether the Wildlife
Protection Act is sufficiently enforced.
The CITES Legislation Project (CITES
2010e) concluded that Belize’s national
legislation does not meet any of the
requirements for implementing CITES.
However, Belize has submitted a plan
and draft legislation to CITES as of
March 2010, but has not officially
enacted the legislation. In spite of this
assessment by CITES, trade data seem to
indicate the threat of unregulated trade
from Belize is minimal. However, as
part of this rule, we are requesting from
the public any information pertaining to
Belize’s efforts to fully enact legislation
and ensure their compliance with
CITES.
Guatemala
The Government of Guatemala also
has a legal framework that regulates the
conservation and sustainable use of
natural resources, including the
Morelet’s crocodile (IIA URL FCAA
IARNA 2003, pp. 67–69; IARNA URL
´
IIA 2006, pp. 104–107; Republica de
Guatemala 2007, pp. 3–4 and 31). In
general terms, and based on our review
of other materials, natural resources
management is under the jurisdiction of
the Ministerio de Ambiente y Recursos
Naturales (Ministry of the Environment
and Natural Resources; USAID 2002, pp.
´
44–45; Republica de Guatemala 2007,
pp. 3–4 and 9). The main legislation in
´
this regard is Decreto Numero 4–89 (Ley
´
de Areas Protegidas, Gobierno de
Guatemala 1989, pp. 1–24; Birner et al.
2005, p. 290; Law of Protected Areas
and Amendments/Revisions). This
´
decree established the Comision
´
Nacional de Areas Protegidas (CONAP;
National Commission on Protected
Areas). CONAP has been tasked to run
´
the Sistema Nacional de Areas
Protegidas (SIGAP; National System of
Protected Areas; IARNA URL IIA 2006,
pp. 104–107). In Guatemala, the
Morelet’s crocodile is included in the
Endangered Species List (Resolution No.
ALC/032–99 of CONAP) in Category 2,
‘‘Seriously Endangered,’’ which includes
species that are endangered because of
habitat loss, trade, the very small size of
their populations and/or endemism
with limited distribution (CITES 2010a,
p. 9).
In the past, threats to the Morelet’s
crocodile and its habitat in Guatemala,
compounded with the lack of funding
and personnel, made it difficult for the
Government of Guatemala to adequately
enforce these laws and regulations.
Ongoing conservation actions were
often overwhelmed by slow economic
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development, high levels of poverty,
unequal land distribution, a highly
segmented society, and the effects of
more than three decades of civil war
(Birner et al. 2005, pp. 285, 292). In
2003, Laguna del Tigre National Park
was considered by ParkWatch as
critically threatened due to land grabs,
the presence of human settlements,
expanding agriculture and cattle
ranching, poaching, forest fires, the oil
industry, and an almost complete lack
of institutional control over the area
(ParksWatch 2003, pp. 1, 11). However,
in 2004 ParksWatch stated that the staff
at Laguna del Tigre had doubled in size
since their 2003 report (ParksWatch
2004, p, 30.) Seventy-three park rangers,
10 archeological site guards and 96
Army personnel were hired to staff the
park and since the increase in staffing,
both the park and the biotope are
‘‘constantly patrolled.’’ In addition, the
Wildlife Conservation Society and U.S.
AID continued its ‘‘Biodiversity
Conservation at a Landscape Scale’’
program and has provided a
comprehensive plan with specific goals
to preserve and protect wildlife in the
MBR in Guatemala through conserving
wildlife species and their habitat, while
maintaining the economic productivity
of renewable natural resources. They are
fulfilling these goals by establishing
specific parameters. Namely, ‘‘to
develop adaptive and participatory
strategy to reduce threats to wildlife in
the MBR; to develop, implement and
monitor sustainable mechanisms to
reduce threats to wildlife and
ecosystems across the MBR landscape;
to learn and teach best management
practices for the conservation of the
MBR and beyond; and to guide, design
and test wildlife-focused planning’’
(WCS 2008, page 3). For the past nine
years the WCS has been conducting
overflights of Laguna del Tigre Park
with the Guatemalan National Park
Service and LightHawk (a volunteerbased environmental aviation
organization) and has used that
information to identify illegal
colonization, resulting in successfully
removing illegal squatters (80+ families)
from the area. In addition, overflights
revealed marijuana clearings on the
´
eastern-most port of Mirador-Rıo Azule
National Park in 2007. WCS overflights
helped to monitor fires, locate illegal
settlements and notify the national and
provincial government as well as the
national media of illegal activities. As a
result, the presence of fires in Laguna
del Tigre National Park has been
reduced by 90%. In addition, WCS has
taken an active role in educating locals
and concessionaires on best
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management practices for sustainable
use of forest products. (WCS 10 year
report, no date given, page 6).
In August 2010, the president of
Guatemala announced that he is
deploying 250 soldiers to recover fully
´
all the protected zones of El Peten in the
Laguna del Tigre section of the MBR.
This ‘‘Green Battalion’’ is being
deployed specifically to protect the
Laguna del Tigre National Park and
work jointly with the National Civil
Police and the Attorney General’s Office
to combat drug trafficking and the
illegal harvest of natural resources and
archaeological sites of that region of the
MBR (Latin American Herald Tribune,
December 6, 2010).
The Government of Guatemala is also
participating in the Tri-national Strategy
(see the Post-Delisting Monitoring
section below) for Morelet’s crocodile,
wherein specific actions directed
toward the Morelet’s crocodile are
defined. Conservation actions in
Guatemala are being developed and
implemented within the context of the
Convention on Biological Diversity and
the National Biodiversity Strategy and
Action Plan (Birner et al. 2005, p. 285).
Many outstanding accomplishments
have been achieved in Guatemala in
terms of biodiversity conservation
(IARNA URL IIA 2006, p. 22) and the
Guatemalan government seems
committed to ensuring that
environmental management and
enforcement efforts continue.
Summary of Factor D
Based on all three range countries
being Parties to CITES, as well as having
protected-species and protected-areas
legislation, and implementing this
legislation, and enforcing relevant laws,
the current regulatory mechanisms
appear to be adequate to conserve the
Morelet’s crocodile in the majority of
the species’ range. As per the CITES
National Legislation Project (CITES
2010e), both Guatemala and Mexico’s
legislation meet all the requirements for
implementing CITES. Belize’s national
legislation was considered not to meet
any of the requirements for
implementing CITES. However, Belize
has submitted a plan and draft
legislation to CITES as of March 2010,
but has not officially enacted the
legislation. Per decisions made during
CoP15, the CITES protections for
Morelet’s crocodiles in Guatemala will
remain unchanged. They will remain
protected as an Appendix-I species,
with those CITES trade restrictions
remaining in place.
Together, Mexico and Belize contain
the majority of wild individuals (87
percent) and the estimated potentially
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suitable habitat (81 percent) throughout
the species’ range. We anticipate that
these conditions will remain essentially
the same, both domestically and
internationally in the sense of moreeffective regulatory mechanisms, in the
foreseeable future (e.g., CITES).
However, we did not solely rely on
these future measures in finding the
species is no longer threatened or
endangered.
Existing regulatory mechanisms,
including CITES and domestic
prohibitions on harvest of wild
Morelet’s crocodiles, have played a vital
role in resurgence of Morelet’s
crocodiles over the last 40 years. While
some trade restrictions could be lifted in
the future, particularly to allow
increased trade in captive-bred
specimens now that Morelet’s
crocodiles in Mexico and Belize have
been moved to CITES Appendix II with
a zero export quota for wild specimens
traded for commercial purposes, we
believe such lifting of restrictions would
pose little risk to the species. All three
range countries restrict the use of wild
specimens and the Government of
Mexico has institutions with proven
track records to administer and enforce
controls on captive-breeding operations
and laundering of illegal specimens.
Should the zero export quota for wild
specimens traded for commercial
purposes be lifted, it may create greater
enforcement challenges in all three
range countries in the foreseeable future
because the taking of wild Morelet’s
crocodiles could be authorized. If it
does, the requirements of CITES
Appendix II will apply. The exporting
country will be required to determine
that the export is not detrimental to the
survival of the species in the wild and
specimens are legally acquired prior to
issuing a permit authorizing the export.
However, a change to the annotation
would require approval of two-thirds of
the Parties voting at a CoP and cannot
be done unilaterally by any of the range
countries. Therefore, we do not have
any indication that CITES and the
regulatory mechanisms of the range
countries will be inadequate to continue
to protect the species in the wild if this
proposed delisting rule under the Act is
finalized, or if ranching is authorized in
the future.
The reproduction and survival rates of
wild Morelet’s crocodiles are currently
robust. Populations remain stable
throughout most of their range, and
have expanded their range in some
areas. In conclusion, we find that, taken
together, the currently existing
protections described above are
adequate, and they will remain adequate
to protect the Morelet’s crocodile and its
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habitat in the majority of its range now
and within the foreseeable future.
Factor E. Other Natural or Manmade
Factors Affecting the Continued
Existence of the Species
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Human-Crocodile Conflicts
The Morelet’s crocodile is known to
attack humans. While data about these
conflicts are limited, anecdotal reports
suggest that these conflicts are
widespread and ongoing. In a welldocumented attack in Belize in August
2001, a Morelet’s crocodile attacked a
13-year-old male and caused him to
drown in the Belama area of Belize City
(Finger et al. 2002, p. 198).
More often, human-crocodile conflicts
involving the Morelet’s crocodile are
more benign. In Mexico, for example,
the Crocodile Museum (Chiapas State;
about 80 cases per year) assists local
officials through the capture, rescue,
and relocation of local crocodilians (all
three species, including the Morelet’s
crocodile) that are considered
potentially dangerous or, because of
their location (close proximity to human
activities), they might be killed by local
´
inhabitants (Domınguez-Laso 2008, p.
5). Abercrombie et al. (1982, p. 19)
reported that the Morelet’s crocodile
was generally feared in Belize. Finger et
al. (2002, p. 199) indicated that
development related to human
occupation (such as residential areas
and infrastructure) in Morelet’s
crocodile habitat around Belize City was
generating increasing numbers of
human-crocodile conflicts. Windsor et
al. (2002, p. 418) also noted that the
practice of feeding the Morelet’s
crocodile by residents and tourists was
becoming more common and was also
generating increasing numbers of
human-crocodile conflicts in Belize.
According to Platt and Thorbjarnarson
(2000a, p. 27), large Morelet’s
crocodiles, despite legal protections, are
still perceived as threats to humans and
livestock, and are occasionally killed
near residential areas in Belize. While
educational programs are needed for
local residents and visitors to deter this
activity, it may also be necessary to
develop a problem crocodile removal
program to resolve these conflicts
(Windsor et al. 2002, p. 418). No
information was available about humancrocodile conflicts in Guatemala.
Although human-crocodile conflicts are
affecting local populations of Morelet’s
crocodiles, and this is likely to continue
in the foreseeable future, we do not have
any evidence that it is currently or
anticipated to be a threat to the species
as a whole.
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Environmental Contaminants
Environmental contaminants are
known to have negative impacts on
terrestrial vertebrates (Smith et al. 2007,
p. 41), including crocodilians (Ross
1998, p. 3). The primary routes through
which terrestrial reptiles, including the
Morelet’s crocodile, are exposed to
environmental pollutants are ingestion
of contaminated prey, dermal contact,
maternal transfer, and accumulation of
chemicals into eggs from contaminated
nesting media (Smith et al. 2007, p. 48).
With regard to the Morelet’s crocodile,
organochlorine contaminants have been
detected in the scutes (external scales)
(DeBusk 2001, pp. viii–ix) and the
chorioallantoic membrane (CAM) of
hatched Morelet’s crocodile eggs
(Pepper et al. 2004, pp. 493 and 495), as
well as in whole contents analysis of
nonviable crocodile eggs (Wu et al.
2000a, p. 6,416; 2000b, p. 671; Wu et al.
2006, 151).
The most common organochlorine
found in studies of Morelet’s crocodile
in Belize was DDE
(dichlorodiphenyldichloroethylene),
detected in 100 percent of eggs collected
by Wu et al. (2000b, p. 673) and 69
percent of CAMs sampled by Pepper et
al. (2004, p. 495). Organochlorines have
also been detected at additional sites
throughout coastal Belize and the
interior highlands (Meerman 2006a, p.
26; Wu et al. 2006, p. 153). Although
exposure to organochlorines has been
linked to adverse effects on population
health of the American alligator in
Florida (several studies cited by Wu et
al. 2000b, p. 676), no population-level
effects were detected in Belize
(McMurry and Anderson 2000, pp. 1
and 4; Wu et al. 2000b, p. 676).
Rainwater (2003, pp. xii and 38),
however, later suggested that some of
the sites that had been chosen for
comparative purposes in fact had
similar contaminant profiles and that
some study results suggesting no
significant differences between sites
may be equivocal.
Vitellogenin induction (development
of the egg yolk) in the Morelet’s
crocodile, suggesting endocrine
disruption due to environmental
contamination when exhibited by
males, recently has become a research
topic in Belize. Reproductive
impairment due to endocrine-disrupting
contaminants has been demonstrated
elsewhere in crocodilians and is
suspected to occur in Belize due to
known contaminant levels (Selcer et al.
2006, p. 50; Rainwater et al. 2008, p.
101). Initial results have not
documented contaminant-induced
vitellogenin in blood plasma in the
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Morelet’s crocodile, but this condition
may occur in the wild in Belize; studies
are ongoing (Selcer et al. 2006, p. 50;
Rainwater et al. 2008, pp. 101 and 106–
107).
Mercury was detected in nonviable
Morelet’s crocodile eggs collected from
eight nests across three localities in
northern Belize in 1995 (Rainwater et al.
2002a, p. 320; Rainwater et al. 2002b, p.
190). While mercury was detected in all
eggs sampled, the mean concentration
per egg was among the lowest reported
values for any crocodile species. No
overt signs of mercury toxicity or
evidence of a population decline was
noted for Morelet’s crocodiles at the site
(Rainwater et al. 2002a, pp. 321–322).
All samples for studies of
organochlorine and mercury
contaminants cited above came from
Belize, and we are not aware of any
similar investigations elsewhere in the
Morelet’s crocodile range (Mexico or
Guatemala). Since reproduction and
survival rates of Morelet’s crocodiles are
currently robust, we do not have any
reason to believe that environmental
contaminants are currently likely to
cause the Morelet’s crocodile to become
in danger of extinction within the
foreseeable future.
Populations currently remain stable
throughout most of the species range,
and have even expanded their range in
some areas. This provides empirical
evidence of the species’ intrinsic
resilience and adaptability. There is no
evidence that environmental
contaminants currently pose a threat to
the species. Although environmental
contaminants may represent a potential
threat, especially given the potential for
long-term bioaccumulation of
contaminants during the species’ long
reproductive life, given this species’
resiliency we do not have any data to
indicate that it is likely to become a
threat in the foreseeable future.
Manmade factors that could affect the
continued existence of the Morelet’s
crocodile, according to CONABIO
(CONABIO 2005, p. 32), were the
construction and operation of oil
extraction infrastructure and
thermoelectric plants. The operation of
chemical and manufacturing industries
could also become a threat if potentially
toxic residual materials are disposed of
improperly. These activities, however,
are highly regulated by the Ley General
´
´
de Equilibrio Ecologico y Proteccion al
Ambiente (LGEEPA); General Ecological
Equilibrium and Environmental
Protection Law) and the Attorney
General for the Protection of the
Environment (PROFEPA). Under
LGEEPA, every new project has to fulfill
strict protocols for the assessment of
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environmental impacts before it can be
approved.
As discussed above in the Factor D.,
Inadequacy of Existing Regulatory
Mechanisms, section, the Government
of Guatemala opposed the Government
of Mexico’s 2010 CITES proposal based,
in part, on threats to the species from
pollution in Guatemala (CITES 2010a, p.
6). However, we do not have any
information or data on the extent of the
impact, if any, that pollution may have
on the Morelet’s crocodile in Guatemala.
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Genetic Diversity and Integrity
At least three factors have been
identified as potential threats with
respect to the Morelet’s crocodile: (1)
Genetic heterogeneity; (2) hybridization;
and (3) male-biased sex ratios.
Genetic Heterogeneity
Evaluation of nine microsatellite loci,
highly repetitive DNA sequences, from
Morelet’s crocodiles in Belize suggested
a high degree of genetic heterogeneity
within local populations, relatively high
levels of migration among populations,
and no evidence of a major genetic
bottleneck due to population depletion
in the mid-1900s (Dever and Densmore
2001, pp. 543–544; Dever et al. 2002,
p. 1084). Population bottlenecks are a
period when a species population drops
to such a low level that many genetic
lineages become extinct and genetic
variation is reduced to a few
individuals, resulting in genetic
homogeneity. If severe, it can lead to
inbreeding. Endangered species that do
not become extinct might expand their
populations, but with limited genetic
diversity, they may not be able to adapt
to changing environmental conditions.
The high degree of genetic heterogeneity
found in Morelet’s crocodiles was
attributed to frequent migration by
individuals among the several adjacent
Morelet’s crocodile populations. Ray et
al. (2004, pp. 455–457) found low levels
of genetic diversity in the mitochondrial
control region of Morelet’s crocodiles at
10 sites in northern Belize and at one
site each in northern Guatemala and
Mexico, but these results were
inconsistent with a population
bottleneck and may be typical of
crocodilian populations. Other studies
of the repetitive sequences in the
mitochondrial control are ongoing in the
Morelet’s crocodile and may be a useful
tool for researchers investigating
population dynamics of this species
(Ray and Densmore 2003, p. 1012).
Hybridization
Data suggest that some hybridization
between Morelet’s crocodiles and
American crocodiles has always
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periodically occurred in the wild in
areas where both species are sympatric,
and that the hybridization is more
frequent than previously believed
´
˜
(Cedeno-Vazquez et al., 2008, p. 666–
´
667; Rodrıguez et al., 2008, p. 678).
While the first hybrids were identified
in coastal areas of eastern Belize, later
studies also located hybrids in Mexico
along the eastern and northern coasts of
the Yucatan Peninsula (Ray et al. 2004,
´
˜
p. 449; Cedeno-Vazquez et al. 2008,
´
p. 661; Rodrıguez et al. 2008, p. 674).
Hybridization involves several key
issues. First, hybridization appears to be
bidirectional (males of one species with
females of the other species, and vice
versa). In addition, hybrids (confirmed
by laboratory tests) do not always
exhibit physical characteristics (such as
body size, shape, or coloration) that are
a mixture of both species, and they are
not always readily identifiable as such
in the hand. Furthermore, F2 hybrids
and backcrosses of hybrids to
nonhybrids have been reported. These
circumstances hinder the field
identification of potential hybrids.
Ray et al. (2004, p. 459) stated that
further assessment of genetic contact
between these two species should
precede reclassification of Morelet’s
under CITES, presumably because of
uncertainty regarding numbers of
genetically pure individuals in Belize.
While populations of both the Morelet’s
crocodile and the American crocodile
suffered from the hunting pressures of
the 1950s and 1960s, the American
crocodile has been slower to recover.
Indeed, Ray et al. (2004, p. 459) noted
that hybridization likely represents a
greater danger to the genetic integrity of
the larger but rarer American crocodile
than to the Morelet’s crocodile in Belize.
The Service believes this concern bears
additional investigation, but is not
sufficient to warrant continued
endangered or threatened status under
the Act for the Morelet’s crocodile.
One hypothetical concern about
hybridization is that supplementation of
wild Morelet’s crocodile populations in
Mexico with captive-bred crocodiles
might affect the genetic integrity of wild
populations. While analyses of captivebred populations have not been
published, differences in the nature and
extent of genetic variation of these
populations compared with wild
populations might be expected. It is not
clear if these differences, if they occur,
would be significant or important from
a conservation standpoint. Furthermore,
this issue may be a moot point.
Although agreements between captivebreeding operations and the
Government of Mexico require breeders
to make available up to 10 percent of
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their offspring for reintroduction to the
wild, or as breeding stock for other
crocodile farms in the country, no
releases of captive-bred stock have
occurred (Mexico 2006, p. 28). No
releases have occurred because the
current total population sizes of wild
populations in Mexico, according to
Mexican officials, are sufficiently large
to render releases unnecessary (CITES
2008, p. 23). However, accidental
escapes and deliberate releases of the
Morelet’s crocodile from captive
rearing-units outside of the species’
natural range have occurred in wetland
habitats along the Pacific coast of
Mexico. These wetland habitats are
already occupied by the naturally
occurring American crocodile, and
interactions between the two crocodile
species are likely (Ross 1995, p. 14).
These escapes and releases of Morelet’s
crocodiles may pose risks to the genetic
integrity of naturally occurring
American crocodiles, but probably not
to Morelet’s crocodiles. The
Government of Mexico is making efforts
to diagnose potential threats to the
native American crocodile caused by
hybridization with the introduced
Morelet’s crocodile on the Pacific coast
of Mexico. The goal of these efforts is to
generate morphological and molecular
identification materials and study the
population dynamics of the American
crocodile. It will include monitoring
and harvest of Morelet’s crocodiles and
hybrids for scientific research (CITES
2010a, p. 6).
Although hybridization between
American and Morelet’s crocodiles
continues to affect negatively some local
populations of the Morelet’s crocodile,
the impacts appear to be very small. We
have no evidence that hybridization is
currently or anticipated to affect
significantly the Morelet’s crocodile
throughout its range.
Male-biased Sex Ratios
Another potential risk from
supplementation of wild populations
with captive-bred Morelet’s crocodiles
is that of skewed sex ratios (greater
proportion of males in captive
populations). Incubation temperature
affects the sex ratio of crocodilian
´
species differently (Escobedo-Galvan
2006, p. 131). Like many crocodilian
species, the Morelet’s crocodile exhibits
temperature-dependent sex
determination. Incubation temperatures
greater than about 93 °F (34 °C) or less
than 90 °F (32 °C) produce females,
while temperatures between 90–93 °F
(32–34 °C) generally produce males
´
(Escobedo-Galvan 2006, p. 133;
´
Escobedo-Galvan et al. 2008, p. 2). Some
wild populations of the Morelet’s
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crocodile in Belize also have greater
proportions of males than females (5.3
males per 1 female), but seem to be
healthy (Platt and Thorbjarnarson
2000a, p. 23). We do not have any
evidence that skewed sex ratios
currently pose a threat to the species.
Although skewed sex ratios may
represent a potential threat, especially
given the potential for skewed sex ratios
as a result of climate change, this
information is not sufficient to be able
to judge the timing of this potential, i.e.,
that it will manifest within the
foreseeable future. Therefore, we do not
have any information to indicate that it
is likely to become a threat in the
foreseeable future.
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Natural Weather Events
Natural weather can affect the
Morelet’s crocodile. Hurricanes or heavy
seasonal rains, for example, may pose
risks to Morelet’s crocodile eggs located
in nests along water channels. Flooding
associated with hurricanes or rains,
however, may also provide conservation
benefits to the Morelet’s crocodile by
facilitating movements of individuals
across the landscape, thereby promoting
gene flow (CITES 2010a, p. 6).
Furthermore, extended dry periods can
result in the temporary disappearance of
ephemeral water bodies, with
concomitant increases in Morelet’s
crocodile densities and intraspecific
interactions at nearby sites that still
have water. There is no evidence,
however, that natural weather
conditions have been a problem for the
Morelet’s crocodile, which has adapted
to these weather conditions. Therefore,
we have no reason to believe that
natural weather events are currently
likely to cause the Morelet’s crocodile to
become in danger of extinction within
the foreseeable future throughout all or
any significant portion of its range.
Climate Change
The Intergovernmental Panel on
Climate Change (IPCC) concluded that
warming of the climate system is
unequivocal (IPCC 2007a, p. 30) and sea
levels are expected to rise well into the
foreseeable future (Bates et al. 2008, pp.
20 and 28–29). Numerous long-term
changes have been observed including
changes in arctic temperatures and ice,
widespread changes in precipitation
amounts, ocean salinity, wind patterns,
and aspects of extreme weather
including droughts, heavy precipitation,
heat waves, and the intensity of tropical
cyclones (IPCC 2007b, p. 7). Based on
scenarios that do not assume explicit
climate policies to reduce greenhouse
gas emissions, global average
temperature is projected to rise by
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2–11.5 °F by the end of this century
(relative to the 1980–1999 time period)
(USGCRP 2011, p. 9). Species that are
dependent on specialized habitat types,
limited in distribution, or occurring
already at the extreme periphery of their
range will be most susceptible to the
impacts of climate change. While
continued change is certain, the
magnitude and rate of change is
unknown in many cases.
The information currently available
on the effects of climate change and the
available climate change models do not
make sufficiently accurate estimates of
location and magnitude of effects at a
scale small enough to apply to the range
of the Morelet’s crocodile. We do not
have any information on the projected
impacts to the Morelet’s crocodile
because of climate change, particularly
the potential impacts of shifting global
temperatures on sex ratios. The study by
´
Escobedo-Galvan et al. 2008 regarding
climate change’s projected impacts to
the American crocodile illustrates the
possible impacts to the Morelet’s
crocodile. This study, entitled ‘‘Potential
effects of climate change on the sex ratio
´
of crocodiles’’ (Escobedo-Galvan et al.
2008), was presented at the February
2008 International Science Symposium:
Climate Change and Diversity in the
Americas. The study selected several
areas in Florida and western Mexico
that contain American crocodiles, and
used the current environmental
information for these areas to predict
how increased temperatures would
affect the potential geographical
distribution and sex ratios of the species
in Florida, the Caribbean, and Central
America.
Based on a preliminary analysis
(focusing on the geographic distribution
and sex ratios of American crocodiles in
the present, 2020, and 2050), Escobedo´
Galvan et al. (2008) postulated that the
geographic distribution and sex ratios of
American crocodile populations in
different parts of the range would
change in response to temperature and
sea level parameters. Crocodiles are
ectothermic, relying on external sources
of heat to regulate their body
temperature. They control their body
temperature by basking in the sun, or
moving to areas with warmer or cooler
air or water temperatures. Optimal
growth in crocodilians has been found
to occur around 88 °F (31 °C), with
appetites and effective digestion
diminishing below 84 °F (29 °C) (Brien
et al. 2007, p. 15). As the global
temperatures increase, areas that are
currently too cool to support American
and Morelet’s crocodiles may become
warm enough to support them in the
´
future. According to Escobedo-Galvan et
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23673
al. 2008, increased global temperatures
and sea level would benefit the
American crocodile by significantly
increasing its potential habitat and
distribution. Their study predicted that
the current potential distribution for the
American crocodile would expand 69
percent in 2020 and 207 percent in
2050. This is an 81 percent increase in
potential distribution from 2020 to 2050
´
(Escobedo-Galvan et al. 2008,
presentation, pp. 9–10).
The study also predicted that
increased global temperatures would
have a significantly negative impact on
the sex ratios of the American crocodile.
Like many other crocodilian species,
both the American and the Morelet’s
crocodile exhibit temperaturedependent sex determination. The
macroclimate (global climate) affects the
mesoclimate (the temperature outside of
a crocodile’s nest), which in turn affects
the microclimate (the temperature
inside of a crocodile’s nest), which in
turn determines the proportion of males
to females produced in the nest
´
(Escobedo-Galvan et al. 2008,
presentation p. 4). Incubation
temperatures greater than about 93 °F
(34 °C) or less than 90 °F (32 °C)
produce females while temperatures
between 90–93 °F (32–34 °C) generally
´
produce males (Escobedo-Galvan 2006,
´
p. 133; Escobedo-Galvan et al. 2008, p.
2). Thus, the production of males is
entirely dependent upon a sustained
incubation temperature range of only
three degrees. Incubation temperatures
greater than 97 °F (36 °C) are at the
upper end of the tolerance range for
reptile eggs and result in death of
embryos and stress to the surviving
´
hatchlings (Escobedo-Galvan et al. 2008,
presentation, p. 2).
´
According to Escobedo-Galvan et al.
2008, the current sex ratio of the
American crocodile favors females
(based on potential species
distribution): 75 percent of the potential
species distribution has fewer males
than females, 15 percent has an equal
number of males and females, and 10
percent has more males than females.
The study predicted that by 2020, the
sex ratio is expected to shift in favor of
males due to increases in nest
temperature as a result of climate
change: 24 percent of the potential
species distribution will have fewer
males than females, 16 percent will
have an equal number of males and
females, and 60 percent will have more
´
males than females (Escobedo-Galvan et
al. 2008, presentation, pp. 11–12).
Under this scenario, the number of
females produced will be reduced
significantly by 2020, which in turn will
reduce the overall total eggs laid in each
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breeding season. Of the eggs laid, more
are likely to become males, which in
turn would further reduce the number
of breeding females produced over time.
´
Escobedo-Galvan et al. 2008 predicted
that by 2050, American crocodiles
would become extinct in Florida, the
Caribbean, or Central America
´
(Escobedo-Galvan et al. 2008,
presentation p. 13).
Although American crocodiles are
found primarily in saline and brackish
environments, they can also be found in
abandoned coastal canals and borrow
pits and may range inland into
freshwater environments preferred by
Morelet’s crocodiles such as lakes and
lower reaches of large rivers. American
crocodiles are extremely adaptable in
their nesting strategy, and while they
mainly nest in holes, individuals will
readily build mound nests if suitable
materials are available. American and
Morelet’s crocodiles have been known
to lay eggs within the same nest mound
as conspecifics, suggesting a more
gregarious and tolerant demeanor (Brien
et al. 2007, pp. 17–18). Sea level rise
would significantly expand the amount
of inland saline and brackish coastal
habitat available to the American
crocodile, and correspondingly decrease
the amount of inland freshwater habitat
available to the Morelet’s crocodile. The
area of available land would also be
reduced as a result of sea level rise,
further increasing competition between
the two species for terrestrial activities
such as nesting and basking on the
shoreline.
´
The study by Escobedo-Galvan et al.
2008 did not provide any information or
data on the effects of climate change on
the Morelet’s crocodile. Although the
American crocodile and Morelet’s
crocodile have overlapping ranges,
similar life-history requirements, and
may lay eggs in the same nest, we do not
have any evidence that climate change
currently poses a threat to the Morelet’s
crocodile. Although climate change may
represent a potential threat to the
Morelet’s crocodile, especially given the
crocodilian requirement for temperature
dependent sex determination, we do not
have any data to indicate that it is likely
to become a threat in the foreseeable
future. We are seeking information and
data on the effects of climate change on
the Morelet’s crocodile as part of this
proposed rule.
Other Potential Concerns
Other information obtained by the
Service, however, suggests that the
construction and operation of dams to
generate electricity could be a
conservation threat to the Morelet’s
crocodile (for example, the Chalillo
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hydroelectric dam in Belize on the
Macal River, an area inhabited by the
Morelet’s crocodile (Environment News
Service 2004, p. 1; Hogan 2008, p. 2). At
the national level, six main
environmental issues affecting natural
resources have been identified for
Belize: (1) High deforestation rate;
(2) solid and liquid waste management
issues; (3) rising poverty rates; (4) rapid
coastal development; (5) ineffective
institution and legal frameworks; and
(6) oil discovery (Young 2008, p. 18).
We do not have any information to
indicate the extent of the impact, if any,
that these environmental issues may
have on the Morelet’s crocodile in
Belize. There is no evidence that these
environmental issues in Belize currently
pose a threat to the species. Although
they may represent a potential threat,
we do not have any data to indicate that
it is likely to become a threat in the
foreseeable future
There has been some information
indicating that fishing nets (for fish and
turtles) and death by drowning as
threats to the Morelet’s crocodile in
Guatemala, but we do not have
information regarding specific rates of
injury or mortality (CITES 2008a, page).
CONABIO (2005, p. 27) suggested that
the number of crocodiles accidentally
captured in nets in Guatemala was low,
but the basis for this claim was unclear.
Platt and Thorbjarnarson (2000b, p. 27)
noted that ‘‘a limited number of
crocodiles’’ drown in fish and turtle nets
in northern Belize each year. There is no
evidence that fishing currently poses a
threat to the species. Although it may
represent a potential threat, we do not
have any data to indicate that it is likely
to become a threat in the foreseeable
future.
Summary of Factor E
Few, if any, natural or manmade
factors are anticipated to affect the
continued existence of the Morelet’s
crocodile. While natural factors such as
hurricanes and extended dry seasons
(CONABIO 2005, p. 32) may affect the
species, we believe that the species has
evolved with these kinds of events and
they do not pose a threat to the species.
Several phenomena are categorized
here as other natural or manmade
factors that were considered as
potentially affecting the conservation
status of the Morelet’s crocodile in the
foreseeable future. Our knowledge about
these factors is incomplete and uneven
among the three range countries.
Environmental contaminants, especially
DDE and mercury, have been widely
reported for Belize. To date, however,
there is no evidence of negative effects
to the Morelet’s crocodile due to
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exposure to organochlorines even
though these contaminants have been
linked to documented adverse effects on
population health in a similar species,
the American alligator.
Vitellogenin induction in males,
suggesting endocrine disruption due to
environmental contamination, is
predicted in Belize, but has not been
documented. These factors do not
appear to pose a conservation threat to
the Morelet’s crocodile in Belize at this
time. Information about environmental
contaminants in Mexico and Guatemala
with regard to the Morelet’s crocodile is
limited. Potential environmental
contaminant issues with respect to the
Morelet’s crocodile probably are the
least well known in Mexico, but that
country has an extensive legal
framework to resolve any problems that
may develop, especially if contaminants
also become a public health issue. We
do not have any information to indicate
that environmental contaminants pose a
danger to the species throughout its
range. Although environmental
contaminants may represent a potential
threat, especially given the potential for
bioaccumulation of contaminants
during the species’ long reproductive
life, we do not have any data to indicate
that it is likely to become a threat to the
species in the foreseeable future.
Bycatch in fishing nets has been
mentioned as a potential problem in
Guatemala. In Belize, a ‘‘limited number
of crocodiles’’ may die or be injured in
nets (Platt and Thorbjarnarson 2000b, p.
27), while information about the
potential negative effects of fishing nets
on the Morelet’s crocodile in Mexico is
limited. Overall, these local impacts do
not appear to have any significant
impact on Morelet’s crocodiles.
Although it may represent a potential
threat, we do not have any data to
indicate that it is likely to become a
threat in the foreseeable future.
Genetic diversity and integrity is a
relatively complicated subject with
respect to the Morelet’s crocodile, and
our knowledge across the three range
countries is uneven. Studies in Belize
suggest that wild populations in that
country have a high degree of genetic
diversity (Dever and Densmore 2001,
pp. 543–544; Dever et al. 2002, p. 1084).
Hybridization between the Morelet’s
crocodile and the American crocodile
has been documented for eastern Belize
and the eastern and northern coasts of
the Yucatan Peninsula in Mexico (Ray et
´
˜
al. 2004, p. 440; Cedeno-Vazquez et al.
2008, p. 661; Rodriguez et al. 2008, p.
674). The nature and extent of genetic
variation of captive-bred populations
with respect to wild populations, as
well as male-biased sex ratios, are also
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poorly understood issues, but
potentially important in Mexico where
captive-bred individuals may eventually
be released into the wild. There is no
indication, however, that the Morelet’s
crocodile suffers from any genetic
limitations throughout its range.
Natural weather events do not appear
to have any population level impacts to
the Morelet’s crocodile, which has
evolved to thrive in this climate. We do
not have any evidence that climate
change poses a threat to the species.
Although climate change may represent
a potential threat, especially given the
crocodilian requirement for temperature
dependent sex determination, we do not
have any data to indicate that it is likely
to become a threat in the foreseeable
future.
Although some local factors continue
to affect the Morelet’s crocodile, we do
not have any information to indicate
that these factors are of sufficient
magnitude to affect any population of
the Morelet’s crocodile. In conclusion,
we find that other natural and manmade
factors are not a significant factor
affecting the Morelet’s crocodile
throughout its range, both now and for
the foreseeable future.
Conclusion of the 5-Factor Analysis
We have carefully assessed the best
scientific and commercial data available
and have determined that the Morelet’s
crocodile is no longer endangered or
threatened throughout all of its range.
When considering the listing status of
the species, the first step in the analysis
is to determine whether the species is in
danger of extinction or likely to become
endangered throughout all of its range.
For instance, if the threats on a species
are acting only on a portion of its range,
but the effects of the threats are such
that they do not place the entire species
in danger of extinction or likely to
become endangered, we would not
retain the entire species on the list.
In developing this proposed rule, we
have carefully assessed the best
scientific and commercial data available
regarding the threats facing this species,
as well as the ongoing conservation
efforts by the three range countries. This
information indicates that numbers of
Morelet’s crocodiles have significantly
increased over the past four decades
since being categorized as depleted by
species experts in the 1970s. In Mexico
and Belize, the species is broadly
distributed geographically, essentially
occupying the entire historical range,
and age classes reflect healthy
reproduction and recruitment into a
wild breeding population of about
10,000–20,000 adults (Ross 2000, p. 3;
CONABIO 2005, p. 19).
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We have identified a number of
potential threats to the Morelet’s
crocodile. Some of these potential
threats may directly or indirectly affect
individual Morelet’s crocodiles, while
others may affect Morelet’s crocodile
habitat. The contributions of these
potential threats, identified in the
Summary of Factors Affecting the
Species sections above are discussed in
approximate descending magnitude of
impact in the foreseeable future:
(1) A continuation of wild harvest for
ranching may pose a threat to the
species if the countries decide to change
course. However, if conducted in
compliance with CITES, the ranching
would have to be non-detrimental for
the specimens to enter international
trade. Our assessment of the risk
associated with this potential threat is
based primarily on the demonstrated
adverse effects of past overharvest on
populations. Additional monitoring
programs and adequate regulatory
mechanisms would need to be
established prior to legalizing ranching.
Such mechanisms would be important
to prevent the laundering of illegally
harvested Morelet’s crocodiles. We find
that, taken together, the currently
existing protections (described above in
the Factor D section, Inadequacy of
Existing Regulatory Mechanisms) are
adequate, and they will remain adequate
to protect the Morelet’s crocodile and its
habitat in the majority of its range now
and within the foreseeable future if this
proposed rule is finalized and the
protections of the Act are removed.
(2) The detection of organic and
inorganic environmental contaminants
in Morelet’s crocodile eggs in Belize
indicates that impacts from
concentrations of environmental
contaminants may represent a potential
threat because Morelet’s crocodiles have
a long lifespan and remain
reproductively active once they attain
sexual maturity. However, there is no
evidence that environmental
contaminants are currently affecting
populations (numbers and reproduction
appear to be robust). In order to
determine that environmental
contaminants may be a threat to the
Morelet’s crocodile in the future, their
presence in the environment must be
occurring at a level that affects the longterm population levels over at least a
significant portion of the range of the
species. We know of no ongoing
monitoring of environmental
contaminants anywhere in the species’
range. Although 45 articles within the
Mexican LGEEPA deal with
environmental contamination
(CONABIO 2005, Annex 3, p. 1), we
have not received a detailed analysis of
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23675
the specific provisions and their
relevance to Morelet’s crocodile. We are
unaware of regulatory mechanisms
governing activities that discharge
environmental contaminants that
potentially affect Morelet’s crocodile in
Belize. However, we do not have any
data to indicate that environmental
contaminants are likely to become a
threat in the foreseeable future.
(3) Although habitat loss and
degradation continues to negatively
affect the habitat for some local
populations of the Morelet’s crocodile,
we do not have any information to
indicate that it is of sufficient
magnitude to have a range-wide impact
on the species to the point that would
cause the Morelet’s crocodile to meet
the definition of either an endangered or
a threatened species. The species’
relatively wide distribution throughout
its historical range and apparent
tolerance for habitats in proximity to
agriculture, grazing, and human
habitation are substantial factors
mitigating these impacts to Morelet’s
crocodiles over the next several
decades. We anticipate that these
conditions will remain essentially the
same in the foreseeable future due to the
adequate regulatory mechanisms in
place to protect suitable habitat for the
Morelet’s crocodile in the majority of its
range (see discussion above under the
Factor D., Inadequacy of Existing
Regulatory Mechanisms, section).
The Morelet’s crocodile continues to
be affected by a variety of potential
residual threats. It is likely that
development, hurricanes and other
storm events, random human
disturbance, fishery activities, oil spills,
and infestation by parasites will
continue to impact individual
crocodiles into the future. Although
these impacts are generally expected to
continue intermittently at low levels
into the foreseeable future, we do not
expect these impacts to affect
significantly the Morelet’s crocodile to
the point that it would result in declines
in the range-wide status of the species.
Although some potential threats to the
Morelet’s crocodile remain throughout
its range, as discussed above, they are at
a low enough level such that they are
not having a significant population level
or demographic effect on Morelet’s
crocodile populations in Mexico and
Belize, in fact, most populations are
stable and/or increasing and still occur
in their historic range. Any low level
threats occurring in Guatemala are
currently being addressed by the
Guatemalan national and provincial
governments with the help of the local
and international NGO community. We
do not believe, based on the best
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available information, that the extent of
potential threats to the species in
Guatemala, even if they increase will
cause the Morelet’s crocodile to become
threatened or endangered in the future.
The government of Guatemala
recognizes the importance of this and
other landscape species in the
Guatemalan Maya Biosphere and are
implementing regulatory and
enforcement controls to combat human
encroachment, land clearing, fires and
other illegal activities that may pose a
threat to these species. In addition,
Guatemala’s request to keep
Guatemala’s populations of Morelet’s
crocodile in Appendix I attests to their
commitment to ensure trade does not
affect Guatemala’s wild Morelet’s
crocodile populations.
Having determined that the Morelet’s
crocodile is no longer endangered or
threatened throughout its range, we
must next determine if the threats to the
Morelet’s crocodile are non-uniformly
distributed such that populations in one
portion of its range experience higher
level of threats that populations in other
portions of its range.
Significant Portion of the Range
Section 4(c)(1) of the Act requires the
Service to determine whether a portion
of a species’ range, if not all, meets the
definition of endangered or threatened.
A portion of a species’ range is
significant if it is part of the current
range of the species and it contributes
substantially to the representation,
resiliency, or redundancy of the species.
The contribution must be at a level such
that its loss would result in a decrease
in the ability to conserve the species. In
other words, in considering
significance, the Service asks whether
the loss of this portion likely would
eventually move the species towards
extinction, but not to the point where
the species should be listed as
threatened or endangered throughout all
of its range.
We evaluated the Morelet’s
crocodile’s range in the context of
whether any potential threats are
concentrated in a portion of its range
such that if there were concentrated
impacts, that crocodile population
might be in danger of extinction. We
further evaluated whether any such
population or complex might constitute
a significant portion of the species
range.
Guatemala’s Contribution to
Representation, Resiliency, or
Redundancy of the Species
As part of the SPR analysis, we look
to see, in terms of species or habitat, if
Guatemala contributes substantially to
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the representation, resiliency, or
redundancy of the Morelet’s crocodile
species.
Resiliency of a species allows the
species to recover from periodic
disturbance. A species will likely be
more resilient if large populations exist
in high-quality habitat distributed
throughout the range of the species in
such a way as to capture the
environmental variability found within
the range of the species. It is likely that
the larger size of a population will help
contribute to the viability of the species
overall. Thus, a portion of a range of a
species may make a meaningful
contribution to the resiliency of the
species if the area is relatively large and
contains particularly high-quality
habitat or if its location or
characteristics make it less susceptible
to certain threats than other portions of
the range. When evaluating whether or
how a portion of the range contributes
to the resiliency of the species, it may
help to evaluate the historical value of
the portion of the range and how
frequently the portion is used by the
species. In addition, the range may
contribute to the resiliency for other
reasons—for instance, it may contain an
important concentration of certain types
of habitat that are necessary for the
species to carry out its life history
functions, such as breeding, feeding,
migration, dispersal or wintering.
Guatemala comprises a small portion
of the overall range of the Morelet’s
crocodile. The estimated number of
Morelet’s crocodiles in Guatemala is
13% of the potential global population
estimate. The extent of undisturbed
habitat in Guatemala is estimated to be
19% of the total range estimate
(CONABIO 2005, pp. 16–19). Past
resource extraction, drug trade, a lack of
enforcement, and financial issues
limited Guatemala’s protected areas’
potential contribution to the
conservation status of the species
(IARNA URL IIA 2006, pp. 88–92),
causing habitat loss, habitat
degradation, habitat fragmentation,
overutilization of resources,
environmental contamination, and the
introduction of exotic species. These
past threats may have lowered the
quality of habitat available to Morelet’s
crocodile. In addition, Morelet’s
crocodile habitat consists of flooded
savannahs and marshes that are typical
of the species habitat throughout its
range, but are not representative of the
environmental variability found within
the total range of the species. The
species’ range, specifically Laguna del
Tigre National Park, was in the past
more susceptible to certain threats. The
small size of the Guatemalan portion of
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the Morelet’s crocodile’s range; the
small population size of the species in
Guatemala; and the past threats that
affected the quality of the habitat limits
Guatemala’s contribution to resiliency.
Therefore, we find that the population
of the Morelet’s crocodile in Guatemala
does not significantly contribute to the
resiliency of the species.
Redundancy of populations may be
needed to provide a margin of safety for
the species to withstand catastrophic
events. This does not mean that any
portion that provides redundancy is a
significant portion of the range of the
species. The idea is to conserve enough
areas of the range such that random
perturbations in the system act on only
a few populations. Therefore, each area
must be examined based on whether
that area provides an increment of
redundancy that is important to the
conservation of the species.
Morelet’s crocodile distribution in the
´
northern State of Peten, Guatemala has
been described as fragmented, with the
healthiest populations in the northern
´
region of Peten, where human impact
˜
was lower (Castaneda Moya 1997, p. 1;
1998a, p. 521). While Guatemala has
regulatory mechanisms in place to
protect their national parks, it appears
that the Government of Guatemala, until
recently, was not able to enforce them
adequately. Although Guatemala has
conserved several areas of the Morelet’s
crocodile’s range, past threats limited
their potential contribution to the
conservation of the species (IARNA URL
IIA 2006, pp. 88–92). The idea is to
conserve enough areas of the range such
that random perturbations in the system
act on only a few populations, however,
Guatemala has been unable in the past
to adequately conserve Morelet’s
habitat. Thus we conclude that the
population of the Morelet’s crocodile in
Guatemala does not significantly
contribute to the redundancy of the
species.
Representation ensures that the
species’ adaptive capabilities are
conserved. Specifically, the portion
should be evaluated to see how it
contributes to the genetic,
morphological, physiological,
behavioral, or ecological diversity of the
species. A substantial contribution to
the representation includes populations
or portions of the range that are
markedly genetically divergent, occur in
a unique or unusual ecological setting,
or have unique morphological,
physiological, or behavioral
characteristics. The loss of genetically
based diversity or unique adaptations
may substantially reduce the ability of
the species to respond and adapt to
future environmental changes. For
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example, a peripheral population may
contribute meaningfully to
representation if there is evidence that
it provides genetic diversity due to its
location on the margin of the species
habitat requirements. Morphological,
physiological, and behavioral diversity
across the range of the species may also
indicate adaptations to environmental
variation or genetically based
differences, and therefore should be
considered when evaluating a portion’s
contribution to representation.
We could not find any data or
information that the Morelet’s crocodile
in Guatemala is ecologically unusual,
unique, or otherwise significant to the
species as a whole in any way (for
example, in terms of species or habitat).
Morelet’s crocodile habitat consists of
flooded savannahs and marshes that are
typical of the species habitat throughout
its range. In addition, we have no
information indicating that the
Guatemala population is genetically
different from the remainder of the
range. We therefore conclude that the
range of the Morelet’s crocodile in
Guatemala does not significantly
contribute to the representation of the
species.
Because the Morelet’s crocodile’s
range in Guatemala does not contribute
significantly towards the resiliency,
redundancy or representation of the
species, we do not consider Guatemala
to be a significant portion of the range
of the species.
Finding
The PVA conducted by Sanchez
´
(Sanchez 2005) suggests the long-term
prognosis for the survival and genetic
diversity of the Morelet’s crocodile
throughout its range is very good,
estimating that the average time to reach
the quasi-extinction threshold of 500
´
individuals being 483 years (Sanchez
2005, pp. 43–51). Under the PVA, the
probability of survival of a population of
30,000 individuals, subject to highstress conditions is approximately 86
percent, and maintaining their genetic
diversity is approximately 99 percent.
A species is ‘‘endangered’’ for
purposes of the Act if it is in danger of
extinction throughout all or a significant
portion of its range and is ‘‘threatened’’
if it is likely to become endangered
within the foreseeable future throughout
all or a significant portion of its range.
The word ‘‘range’’ is used here to refer
to the range in which the species
currently exists, and the word
‘‘significant’’ refers to the value of that
portion of the range being considered to
the conservation of the species.
The Act does not define the term
‘‘foreseeable future.’’ However, in a
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January 16, 2009, memorandum
addressed to the Acting Director of the
Service from the Office of the Solicitor,
Department of the Interior, concluded,
‘‘* * * as used in the [Act], Congress
intended the term ‘foreseeable future’ to
describe the extent to which the
Secretary can reasonably rely on
predictions about the future in making
determinations about the future
conservation status of the species’’ (U.S.
Department of the Interior 2009, page 1).
‘‘Foreseeable future’’ is determined by
the Service on a case-by-case basis,
taking into consideration a variety of
species-specific factors such as lifespan,
genetics, mating systems, demography,
threat projection timeframes, and
environmental variability.
In considering the foreseeable future
as it relates to the status of the Morelet’s
crocodile, we defined the ‘‘foreseeable
future’’ to be the extent to which, given
the amount and substance of available
data, events or effects can and should be
anticipated, or the threats reasonably
extrapolated. We considered the
historical data to identify any relevant
threats acting on the species, ongoing
conservation efforts, data on species
abundance and persistence at individual
sites since the time of listing, and
identifiable informational gaps and
uncertainties regarding residual and
emerging threats to the species, as well
as population status and trends. We
then looked to see if reliable predictions
about the status of the species in
response to those factors could be
drawn. We considered the historical
data to identify any relevant existing
trends that might allow for reliable
prediction of the future, in the form of
extrapolating the trends. We also
considered whether we could reliably
predict any future events, not yet acting
on the species and, therefore, not yet
manifested in a trend, that might affect
the status of the species, recognizing
that our ability to make reliable
predictions into the future is limited by
the variable quantity and quality of
available data. Following a range-wide
threats analysis, we evaluated whether
the Morelet’s crocodile is endangered or
threatened in any significant portion(s)
of its range.
As required by the Act, we considered
the five factors in assessing whether the
Morelet’s crocodile is threatened or
endangered throughout all or a
significant portion of its range. We
reviewed the petition, information
available in our files, comments and
information received after the
publication of our 90-day finding (71 FR
36743), and other available published
and unpublished information, and
consulted with recognized experts. We
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have carefully assessed the best
available scientific and commercial data
regarding the past, present, and future
threats faced by the Morelet’s crocodile.
This status review found that although
some localized impacts to individual
Morelet’s crocodiles still occur, such as
habitat loss from agricultural
development, they have been reduced
enough so as to not impact the species
on a population level. In addition to the
five-factor analysis, we also considered
the progress made by the range
countries towards addressing previous
threats to Morelet’s crocodiles. We took
into consideration the conservation
actions that have occurred, are ongoing,
and are planned. Since listing, the
species’ status has improved because of
the following:
• National and international laws and
treaties have minimized the impacts of
hunting and trade in wild-caught
specimens.
• Morelet’s crocodile populations are
stable or increasing.
• Total population size is
approximately 19,400 adults in the three
range countries.
• Species experts now widely
characterize Morelet’s crocodile
populations as healthy.
• The current range-wide distribution
of Morelet’s crocodile now closely
resembles historical range-wide
distribution
• Range countries have improved
efforts to protect and manage Morelet’s
crocodile habitat.
• The long-term prognosis for the
survival and genetic diversity of the
Morelet’s crocodile throughout its range
is very good
In sum, the ongoing development and
updating of management plans, the
active management of habitat, the
ongoing research, and the protections
provided by laws and protected lands
provide compelling evidence that
recovery actions are successful.
The primary factor that led to the
listing of the Morelet’s crocodile was
trade. However, the trend today is
towards increasing population sizes,
with trade restricted to captive-bred
specimens only. We find that the
localized impacts identified in the three
range countries, when combined with
the increase in population sizes,
ongoing active research and
management, and protections provided
by range countries, those impacts are
not of sufficient imminence, intensity,
or magnitude to indicate that the
Morelet’s crocodile is threatened with
extinction now or in the foreseeable
future. Consequently, we have
determined that Morelet’s crocodile
should be removed from the list of
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plants.
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Distinct Vertebrate Population
Segments
Section 3(15) of the Act defines
‘‘species’’ to include ‘‘any species or
subspecies of fish and wildlife or plants,
and any distinct population segment of
any species of vertebrate fish or wildlife
which interbreeds when mature (16
U.S.C. 1532(16)). After assessing
whether or not the Morelet’s crocodile
is endangered or threatened throughout
its range, we next consider whether a
distinct vertebrate population segment
(DPS) of the Morelet’s crocodile meets
the definition of endangered or is likely
to become endangered in the foreseeable
future (threatened).
To interpret and implement the DPS
provisions of the Act and congressional
guidance, the Service and the National
Marine Fisheries Service (now the
National Oceanic and Atmospheric
Administration—Fisheries Service),
published the Policy Regarding the
Recognition of Distinct Vertebrate
Population Segments (DPS Policy) in
the Federal Register on February 7,
1996 (61 FR 4722). Under the DPS
Policy, we evaluate a set of elements in
a three-step process in order to make
our decision concerning the
establishment and classification of a
possible DPS. These elements are
applied similarly for additions to or
removals from the Federal List of
Endangered and Threatened Wildlife
and Plants.
These elements include: (1) The
discreteness of a population in relation
to the remainder of the taxon to which
it belongs; (2) the significance of the
population segment to the taxon to
which it belongs; and (3) the population
segment’s conservation status in relation
to the Act’s standards for listing
(addition to the list), delisting (removal
from the list), or reclassification (i.e., is
the population segment endangered or
threatened).
First, the Policy requires the Service
to determine that a vertebrate
population is discrete in relation to the
remainder of the taxon to which it
belongs. Discreteness refers to the
ability to delineate a population
segment from other members of a taxon
based on either (1) Physical,
physiological, ecological, or behavioral
factors, or (2) international
governmental boundaries that result in
significant differences in control of
exploitation, management, or habitat
conservation status, or regulatory
mechanisms that are significant in light
of section 4(a)(1)(D) of the Act—the
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inadequacy of existing regulatory
mechanisms.
Second, if we determine that the
population is discrete under one or
more of the discreteness conditions,
then a determination is made as to
whether the population is significant to
the larger taxon to which it belongs in
light of Congressional guidance (see
Senate Report 151, 96th Congress, 1st
Session) that the authority to list DPSs
be used ‘‘sparingly and only when the
biological evidence indicates that such
action is warranted.’’ In carrying out this
examination, we consider available
scientific evidence of the population’s
importance to the taxon to which it
belongs. This consideration may
include, but is not limited to the
following: (1) The persistence of the
population segment in an ecological
setting that is unique or unusual for the
taxon; (2) evidence that loss of the
population segment would result in a
significant gap in the range of the taxon;
(3) evidence that the population
segment represents the only surviving
natural occurrence of a taxon that may
be more abundant elsewhere as an
introduced population outside of its
historic range; and (4) evidence that the
discrete population segment differs
markedly from other populations of the
species in its genetic characteristics
from other populations of the species. A
population segment needs to satisfy
only one of these conditions to be
considered significant.
Lastly, if we determine that the
population is both discrete and
significant, then the Policy requires an
analysis of the population segment’s
conservation status in relation to the
Act’s standards for listing (addition to
the list), delisting (removal from the
list), or reclassification (i.e., is the
population segment endangered or
threatened).
Discreteness
The first step in our DPS analysis for
the Morelet’s crocodile was to
determine whether there were any
populations of the Morelet’s crocodile
that were discrete in relation to the
remainder of the taxon to which it
belongs. Under the DPS Policy, a
population segment of a vertebrate
taxon may be considered discrete if it
satisfies either one of the following
conditions: (1) It is markedly separated
from other populations of the same
taxon because of physical,
physiological, ecological, or behavioral
factors. Quantitative measures of genetic
or morphological discontinuity may
provide evidence of this separation; or
(2) it is delimited by international
governmental boundaries within which
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differences in control of exploitation,
management of habitat, conservation
status, or regulatory mechanisms exist
that are significant in light of section
4(a)(1)(D) of the Act—the inadequacy of
existing regulatory mechanisms.
Recognition of international boundaries
when they coincide with differences in
the management, status, or exploitation
of the species under the Act is
consistent with CITES, which
recognizes international boundaries for
these same reasons. CITES is
implemented in the United States by the
Act.
Physical, Physiological, Ecological, or
Behavioral Factors
We do not have any data or
information to indicate that there are
any physical, physiological, ecological,
or behavioral facts that separate any
populations of the Morelet’s crocodile.
The historical distribution of the
Morelet’s crocodile comprised the
eastern coastal plain of Mexico, most of
the Yucatan Peninsula, Belize, and
northern Guatemala (Hurley 2005, p. 1),
with an estimated historical distribution
covering 173,746 mi2 (450,000 km2)
´
(Sigler and Domınguez Laso 2008, pp.
11–12). The Morelet’s crocodile is a
wide-ranging species that occurs
primarily in freshwater environments
such as lakes, swamps, and slowmoving rivers. This species of crocodile
can temporarily inhabit intermittent
freshwater bodies such as flooded
savannahs and is occasionally observed
in brackish coastal lagoons (Villegas
2006, p. 8).
We do not have any data or
information to indicate that any
populations of the Morelet’s crocodile
exhibit genetic or morphological
discontinuity that may indicate that
they are a separate population.
Although we do not have any data or
information on the dispersal strategies
for the Morelet’s crocodile that would
indicate a population may be discrete,
we have no evidence to suggest that
there are barriers that would prevent the
Morelet’s crocodile from dispersing
within its known range. The current
range-wide distribution of the Morelet’s
crocodile closely mirrors the historical
range-wide distribution, and there are
large amount of high quality of habitat
available. Therefore, we have no
evidence suggesting that the Morelet’s
crocodile is isolated in any part of its
range.
International Differences in Species’
Conservation Status
As discussed above in the Factor D
section, Inadequacy of Existing
Regulatory Mechanisms, all three range
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countries are Parties to CITES. In
addition, data and information available
to the Service indicates that all three
range countries have Federally
protected-species and protected-areas
legislation under the jurisdiction of
specific ministries or departments that
control activities that affect the
Morelet’s crocodile and its habitat.
Mexico’s Federal legal framework is
particularly robust. The CITES National
Legislation Project (https://
www.CITES.org) deemed both Mexico
and Guatemala’s national legislation as
Category 1, meeting all the requirements
to implement CITES, with Belize in
Category 3 (not meeting the
requirements for implementing CITES),
but having submitted a national
legislation plan and draft of legislation
that has not yet been adopted.
Based on current data and
information available to the Service, the
Governments of Mexico, Guatemala, and
Belize appear to be adequately enforcing
their respective legal frameworks, both
at the Federal level and under CITES.
Mexico and Belize contain the majority
of wild Morelet’s crocodiles (87 percent)
and the majority of the potentially
suitable habitat (81 percent) throughout
the species’ range. Because of this
adequate enforcement, the majority of
the threats to the species and its habitat
have been eliminated in Mexico and
Belize. Although some residual threats
remain, these threats have been reduced
to a low enough level that they are not
having significant population level or
demographic effects.
In contrast, based on data and
information available to the Service, it
appears that in the past, the Government
of Guatemala was not able to enforce
adequately their legal framework to
protect the Morelet’s crocodile and its
habitat in Guatemala. The lack of
funding and personnel made
enforcement of Guatemala’s legal
framework especially challenging.
Conservation actions were often
overwhelmed by slow economic
development, high levels of poverty,
unequal land distribution, a highly
segmented society, and the effects of
more than three decades of civil war
(Birner et al. 2005, pp. 285, 292).
For example, per ParkWatch (2003)
noted that a designation as a national
park or important wetland conservation
area in Guatemala does not necessarily
afford protection to the Morelet’s
crocodile or its habitat. The Laguna del
´
Tigre National Park, located in Peten
region of Guatemala, is home to the
largest population of Morelet’s
crocodiles in Guatemala. The park was
considered by ParkWatch as critically
threatened due to land grabs, the
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presence of human settlements,
expanding agriculture and cattle
ranching, poaching, forest fires, the oil
industry, and almost complete lack of
institutional control over the area
(ParksWatch 2003, pp. 1, 11). However,
by 2004, ParksWatch stated that the staff
at Laguna del Tigre had doubled in size
since their 2003 report. Seventy-three
park rangers, 10 archeological site
guards and 96 Army personnel were
hired to staff the park and since the
increase in staffing, both the park and
the biotope are ‘‘constantly patrolled.’’ In
addition, the WCS continued its
‘‘Biodiversity Conservation at a
Landscape Scale’’ program (with USAID)
for Guatemala and has provided a
comprehensive plan with specific goals
to preserve and protect wildlife in the
Maya Biosphere Reserve in Guatemala
through conserving wildlife species and
their habitat, while maintaining the
economic productivity of renewable
natural resources. They are fulfilling
these goals by establishing specific
parameters. Namely, ‘‘to develop
adaptive and participatory strategy to
reduce threats to wildlife in the MBR; to
develop, implement and monitor
sustainable mechanisms to reduce
threats to wildlife and ecosystems
across the MBR landscape; to learn and
teach best management practices for the
conservation of the MBR and beyond;
and to guide, design and test wildlifefocused planning’’ (WCS 2008, page 3).
These efforts were endorsed by the
president of Guatemala through his
office’s attendance at the Mesa
Multisectorial roundtable discussion
held in Guatemala in 2009.
Many outstanding accomplishments
have been achieved in Guatemala in
terms of biodiversity conservation
(IARNA URL IIA 2006, p. 22), and
efforts to achieve desired levels of
environmental management are
ongoing. In August 2010, the president
of Guatemala announced that he is
deploying 250 soldiers to recover fully
all the protected zones of El Peten in the
Laguna del Tigre section of the MBR.
This ‘‘Green Battalion’’ is being
deployed specifically protect the Laguna
del Tigre National Park and work jointly
with the National Civil Police and the
Attorney General’s Office to combat
drug trafficking and the illegal harvest
of natural resources and archaeological
sites of that region of the MBR (Latin
American Herald Tribune, December 6,
2010). Additional help from WCS and
USAID includes establishing over flights
to monitor fires, locating illegal
settlements and notifying the national
and provincial government of illegal
activities, as well as the national media.
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These efforts have resulted in additional
personnel added to parks, removal of
settlements, consistent patrols and
cessation of illegal activities, and
educating locals and concessionaires on
best management practices for
sustainable use of forest products. In
addition, the CITES National Legislation
Project (https://www.CITES.org) deemed
both Mexico and Guatemala’s national
legislation as Category 1, meeting all the
requirements to implement CITES, with
Belize in Category 3 (not meeting the
requirements for implementing CITES),
but having submitted a national
legislation plan and draft of legislation
that has not yet been adopted.
˜
Castaneda Moya (1998a, p. 521;
1998b, p. 13) listed illegal hunting as a
threat to Morelet’s crocodile in the
´
Peten region of Guatemala (CITES
2010a), but did not provide a numerical
estimate of the take. ARCAS, an animal
welfare group in Guatemala, reported
the rescue or recovery of 49 live
individuals (about 8 per year), most
likely from pet dealers or private
individuals, during the period 2002–
2007 (ARCAS 2002, p. 3; 2003, p. 2;
2004, p. 2; 2005, p. 2; 2006, p. 3; 2007,
p. 3).
The Government of Guatemala
acknowledged these issues when it
opposed Mexico’s 2010 CITES proposal
to transfer the Morelet’s crocodile from
Appendix I to Appendix II throughout
its range. Specifically, the Government
of Guatemala opposed transferring
Morelet’s crocodiles in Guatemala to
Appendix II based on the lack of
knowledge of the population and
population trends in Guatemala, the
potential threats to the species from
deforestation and pollution in
Guatemala, and the likelihood of illegal,
cross-border trade taking place in
Guatemala. Morelet’s crocodiles in
Guatemala remain in CITES Appendix I
(CITES 2010a, p. 2). As a result of the
Government of Guatemala’s past
inability to adequately enforce their
legal framework, the Morelet’s crocodile
in Guatemala may be still subject to
some illegal hunting and some
destruction of habitat due to previous
human encroachment. This constitutes a
difference in control of exploitation,
management of habitat, conservation
status, or regulatory mechanisms that is
significant in light of section 4(a)(1)(D)
of the Act.
Conclusion on Discreteness
We have determined, based on the
best available data and information that
the population of Morelet’s crocodiles
in Guatemala is discrete due to the
significant difference in the control of
exploitation, management of habitat,
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conservation status, or regulatory
mechanisms between international
boundaries. Therefore, we have
determined that the Guatemala
population of the Morelet’s crocodile
meets the requirements of our DPS
Policy for discreteness. We will next
conduct an analysis of the Guatemala
population of the Morelet’s crocodile
under the significance element of the
DPS Policy.
Significance
Having determined that the
population of Morelet’s crocodiles in
Guatemala is discrete under one or more
of the discreteness conditions described
in the DPS Policy, we must then
determine whether the population in
Guatemala is significant. We evaluate its
biological and ecological significance
based on ‘‘the available scientific
evidence of the discrete population
segment’s importance to the taxon to
which it belongs’’ (61 FR 4725). We
make this evaluation in light of
congressional guidance that the
Service’s authority to list DPSs be used
‘‘sparingly.’’ Since precise circumstances
are likely to vary considerably from case
to case, the DPS Policy does not
describe all the classes of information
that might be used in determining the
biological and ecological importance of
a discrete population. However, the DPS
Policy describes four possible classes of
information that provide evidence of a
population segment’s biological and
ecological importance to the taxon to
which it belongs. As specified in the
DPS Policy (61 FR 4722), consideration
of the population segment’s significance
may include, but is not limited to the
following: (1) Persistence of the
population segment in an ecological
setting that is unusual or unique for the
taxon; (2) evidence that loss of the
population segment would result in a
significant gap in the range of the taxon;
(3) evidence that the population
segment represents the only surviving
natural occurrence of a taxon that may
be more abundant elsewhere as an
introduced population outside of its
historic range; and (4) evidence that the
discrete population segment differs
markedly from other populations of the
species in its genetic characteristics. A
population segment needs to satisfy
only one of these conditions to be
considered significant.
Persistence in a Unique Ecological
Setting
As stated in the DPS Policy, the
Service believes that occurrence in an
unusual ecological setting may be an
indication that a population segment
represents a significant resource
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warranting conservation under the Act
(61 FR 4724). In considering whether
the population occupies an ecological
setting that is unusual or unique for the
taxon, we evaluate whether the habitat
includes unique features not used by the
taxon elsewhere and whether the habitat
shares many features common to the
habitats of other populations. As stated
above, the Morelet’s crocodile is a wideranging species that occurs primarily in
freshwater environments such as lakes,
swamps, and slow-moving rivers. This
species of crocodile can temporarily
inhabit intermittent freshwater bodies
such as flooded savannahs and is
occasionally observed in brackish
coastal lagoons (Villegas 2006, p. 8). We
do not have any evidence to indicate
that the Guatemala population of the
Morelet’s crocodile occurs in habitat
that includes unique features not used
by the taxon elsewhere in its range.
Morelet’s crocodile habitat in the
Laguna del Tigre National Park consists
of flooded savannahs and marshes that
are typical of the species habitat
throughout its range. Therefore, we
conclude that the discrete population of
Morelet’s crocodiles in Guatemala is not
‘‘significant’’ because of persistence in a
unique or unusual ecological setting.
Significant Gap in the Taxon’s Range
As stated in the DPS Policy, the
Service believes that evidence that loss
of the discrete population segment
would result in a significant gap in the
range of a taxon, is potentially an
indication that a population segment
represents a significant resource
warranting conservation under the Act
(61 FR 4724). As the Ninth Circuit has
stated, ‘‘[t]he plain language of the
second significance factor does not limit
how a gap could be important,’’
National Ass’n of Home Builders v.
Norton, 340 F.3d 835, 846 (9th Cir.
2003). Thus, we considered a variety of
ways in which the loss of the Guatemala
population of the Morelet’s crocodile
might result in a significant gap in the
range of species. Namely, we considered
whether Guatemala contributed to the
resiliency, redundancy, or
representation of the taxon’s range. As
stated previously in the Significant
Portion of the Range analysis, the
Service felt that due to the small size of
the Guatemalan portion of the Morelet’s
crocodile’s range and the small
population size of the species in
Guatemala, its overall contribution to
the species was limited. While
Guatemala has regulatory mechanisms
in place to protect their national parks,
it appears that until recently, the
government was unable to enforce them
adequately. Although Guatemala has
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conserved several areas of the Morelet’s
crocodile’s range, past threats limited
this population’s contribution to the
species (IARNA URL IIA 2006, pp. 88–
92). Morelet’s crocodile habitat consists
of flooded savannahs and marshes that
are typical of the species habitat
throughout its range, but are not
ecologically unusual, unique, or
otherwise significant to the species as a
whole in any way. In addition, we
found no information indicating that the
Guatemala population is genetically
different from the remainder of the
range.
Conclusion of Significant Gap in the
Taxon’s Range
The Morelet’s crocodile in Guatemala
does not significantly contribute to the
resiliency, redundancy or the
representation of the species or its
range, including but not limited to, the
size of the range, habitat quality, habitat
variability, or genetic uniqueness. The
majority of the species range occurs in
Mexico and Belize, which contain the
majority of all wild Morelet’s crocodiles
(87 percent) and the majority of the
potentially suitable habitat throughout
the species’ range (81 percent). Should
a discrete population segment of
Morelet’s crocodiles in Guatemala
decrease for any reason (which we have
concluded is unlikely), then it is likely
that Morelet’s crocodiles in Mexico and
Belize would expand their range and recolonize any potential habitat in
Guatemala. Thus, we feel the loss of a
discrete population segment in
Guatemala would not create a
significant gap in the range of the
species, nor does it represent a
significant resource warranting
conservation under the Act.
Natural Occurrence of a Taxon
Abundant Elsewhere as an Introduced
Population
As stated in the DPS Policy, the
Service believes that evidence that the
population segment represents the only
surviving natural occurrence of a taxon
that may be more abundant elsewhere as
an introduced population outside of its
historic range may be an indication that
a population segment represents a
significant resource warranting
conservation under the Act (61 FR
4724). This element does not apply to
the Morelet’s crocodile in Guatemala.
The Guatemala population of the
Morelet’s crocodile does not represent
the only surviving natural occurrence of
the Morelet’s crocodile throughout the
range of the taxon. After the protections
of the Act and CITES were put in place
in the 1970s, populations of Morelet’s
crocodiles increased and expanded their
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range naturally over time to the point
that they have recovered and are now
found in all areas of their historic range.
Marked Differences in Genetic
Characteristics
As stated in the DPS Policy, the
Service believes that evidence that a
discrete population segment differs
markedly from other populations of the
species in its genetic characteristics may
be an indication that a population
segment represents a significant
resource warranting conservation under
the Act (61 FR 4724).
Genetic diversity and integrity is a
relatively complicated subject with
respect to the Morelet’s crocodile, and
our knowledge across the three range
countries is uneven. The genetic data
we do have are with respect to
hybridization between Morelet’s
crocodiles and American crocodiles.
Thus, we have no information
indicating that the Guatemala
population is markedly different from
the remainder of the range.
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Conclusion on Significance
First, we do not have any data or
information to indicate that the
Guatemala population of the Morelet’s
crocodile occurs in habitat that includes
unique features not used by the taxon
elsewhere in its range. Morelet’s
crocodile habitat in the Laguna del Tigre
National Park consists of flooded
savannahs and marshes that are typical
of the species habitat throughout its
range. Second we conclude that loss of
Morelet’s crocodiles in 13 percent of
their range would not constitute a
significant gap in the range of the
species due to the loss of a population
that is ecologically unusual, unique, or
otherwise significant to the species as a
whole in any way (for example, in terms
of species or habitat) or that contributes
substantially to the representation,
resiliency, or redundancy of the species.
Third, the Guatemala population of the
Morelet’s crocodile does not represent
the only surviving natural occurrence of
the Morelet’s crocodile throughout the
range of the taxon. Finally, the
Guatemala population of the Morelet’s
crocodile does not have any genetic
characteristics that are markedly
different from Morelet’s crocodiles
elsewhere in the range of the taxon.
Therefore, based on the information
available to the Service, we conclude
that the discrete population of Morelet’s
crocodiles in Guatemala does not meet
the requirements under our DPS Policy
for significance.
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Conclusion of DPS Analysis
Based on the best available data and
information, we conclude that the
Guatemala population of the Morelet’s
crocodile meets the requirements of our
DPS Policy for discreteness, but does
not meet the requirements of our DPS
policy for significance in relation to the
remainder of the taxon (i.e., Morelet’s
crocodiles in Mexico and Belize). The
population of Morelet’s crocodiles in
Guatemala is discrete due to the
significant difference in the control of
exploitation, management of habitat,
conservation status, or regulatory
mechanisms between international
boundaries. This difference is evidenced
by the fact that Morelet’s crocodiles in
Guatemala remain listed under
Appendix I of CITES, while those in
Mexico and Belize were downgraded to
Appendix II. The discrete population of
Morelet’s crocodiles in Guatemala does
not meet the requirements of our DPS
policy for significance because it: (1)
Does not occur in habitat that includes
unique features not used by the taxon
elsewhere in its range; (2) would not
constitute a significant gap in the range
of the species due to the loss of a
population that contributes
substantially to the representation,
resiliency, or redundancy of the species;
(3) does not represent the only surviving
natural occurrence of the Morelet’s
crocodile throughout the range of the
taxon; and (4) does not have any genetic
characteristics that are markedly
different from Morelet’s crocodiles
elsewhere in the range of the taxon.
Therefore, we conclude that the
population of the Morelet’s crocodile in
Guatemala is not a DPS pursuant to our
DPS Policy, and, therefore, is not a
listable entity under section 3(15) of the
Act.
Effects of This Proposed Rule
This proposed rule, if made final,
would revise our regulations at 50 CFR
17.11(h) by removing the Morelet’s
crocodile throughout its range from the
Federal List of Endangered and
Threatened Wildlife. Our regulations do
not authorize designating critical habitat
in areas outside of the United States.
Specifically, our regulations at 50 CFR
424.12(h) specify that critical habitat
shall not be designated within foreign
countries or in other areas outside of
U.S. jurisdiction. Because no critical
habitat was ever designated for this
species, this rule would not affect 50
CFR 17.95.
The prohibitions and conservation
measures provided by the Act,
particularly through section 9, would no
longer apply. This rulemaking, however,
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23681
does not affect the protection given to
the Morelet’s crocodile under CITES.
Delisting under the Act would allow
import, re-export, and commercial
activity in Morelet’s crocodiles and their
parts and products originating from any
country, including the three range
countries, provided that the
requirements of CITES are met.
Post-delisting Monitoring
Section 4(g)(1) of the Act requires the
Secretary of Interior, through the
Service, to implement a system in
cooperation with the States to monitor
for not less than 5 years the status of all
species that are removed from the lists
of endangered and threatened wildlife
and plants (50 CFR 17.11, 17.12) due to
recovery. This monitoring requirement
is to ensure prevention of significant
risk to the well-being of recovered
species.
Species monitoring is also called for
under CITES. CITES Resolution Conf.
9.24 (Rev. CoP 15), provides criteria for
including species under CITES
Appendices I and II. Through the
resolution, the parties have resolved
that the status of species included in
Appendices I and II should be regularly
reviewed by the range countries and
proponents, in collaboration with the
CITES Animals Committee or Plants
Committee, in order to monitor the
effectiveness of CITES protections,
subject to the availability of funds
(CITES 2007a, p. 3).
At the international level, perhaps the
most important ongoing conservation
effort for the Morelet’s crocodile is the
agreement by the three range countries
to develop and implement the BelizeGuatemala-Mexico Tri-national Strategy
for the Conservation and Sustainable
Management of Morelet’s Crocodile
(Crocodylus moreletii) (Estrategia Tri´
nacional Belice-Guatemala-Mexico para
´
la Conservacion y el Manejo Sostenible
del Cocodrilo de Morelet (Crocodylus
moreletii) (Tri-national Strategy)
´
(Sanchez 2006).
This initiative began in June 2001 at
´
Laguna del Tigre National Park, Peten,
Guatemala, when representatives of the
three countries met to discuss matters of
mutual interest. A follow up meeting
attended by about 25 species experts
and government officials from all three
range countries took place in April 2006
(Mexico City, Mexico). Two working
groups were formed: (1) Technical and
Scientific Matters; and (2)
Administration, Management, and Uses.
Group members discussed technical
issues for two days, and generated a
series of products, commitments, and
agreements. The first group produced or
agreed to compile a series of documents,
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including distribution maps, survey
techniques, scientific literature, and
databases (e.g., geographic information
system). The second group agreed to
work toward a regional assessment of
the conservation status of the Morelet’s
crocodile, as well as development and
implementation of regional actions to
improve the conservation status of the
species (institutional capacity building,
project development and
implementation, and development of a
regional captive-breeding program). The
final product of the workshop was the
development of ‘‘Estrategia Regional
´
para el Manejo y la Conservacion del
Cocodrilo de Morelet (Crocodylus
moreletii) (Regional Strategy for the
Management and Conservation of the
Morelet’s Crocodile) (Regional Strategy),
found on pp. 43–53 of the Tri-national
Strategy document (Sanchez 2006). This
Regional Strategy outlines a series of
objectives, products, and working
protocols to accomplish the goals of the
Tri-national Strategy. As these tasks are
completed, they will significantly
enhance the conservation status of the
Morelet’s crocodile.
´
According to Sanchez Herrera and
´
Alvarez-Romero (2006), as result of this
initiative, the three range countries have
agreed to implement the Regional
Strategy, which also includes
monitoring the species. The three range
countries plan to implement the
Regional Strategy by:
(1) Conducting population surveys in
defined priority areas using systematic
and coordinated monitoring, with
standardized fieldwork methods and
techniques.
(2) Developing a shared biological and
geographical information system.
(3) Identifying priority areas and
routes for conservation and
surveillance, along with those for future
potential for ranching.
(4) Supporting and developing
educational programs and outreach
materials.
(5) Promoting personnel training and
experience exchange, including field
techniques and surveillance.
(6) Promoting species-friendly
production projects such as close-cycle
farms (and eventually future ranching),
along with the development of a legal
regional market and a certification
strategy for Morelet’s crocodile
products.
(7) Raising funds in support of the
activities and tasks outlined in the
´
´
Strategy (Sanchez Herrera and AlvarezRomero 2006, p. 263).
The Government of Mexico is making
efforts to design and implement a
countrywide monitoring program for the
populations and habitat of the Morelet’s
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crocodile, including the possibility of
involving Belize and Guatemala. The
aim is to build on the experiences and
results of the COPAN Project and the
suggestions made at the 23rd meeting of
the CITES Animals Committee (Geneva,
April 2008, see the Animals Committee
summary record labeled as document
AC23) to obtain better information about
the status and trends of relevant
populations of the species and their
habitat. The program will be developed
in the framework of the Tri-national
Strategy (CITES 2010a, p. 9). The
Government of Mexico has established
contacts with the Governments of Belize
and Guatemala as part of the TriNational Strategy (CITES 2008, p. 32).
Stage 1 of the project is currently
under way. It aims to develop a
preliminary design of the program,
considering relevant areas in the range
of the species. Ideally, areas could be
selected in the three countries, based on
the COPAN Project and subsequent
studies. The design will be reviewed
and assessed in a 2010 workshop
involving species experts and
authorities, who will agree upon on the
most appropriate methods and define
time intervals, routes/localities and
variables to take into account for
crocodiles and their habitat. Manuals
will be developed to ensure the
effectiveness of fieldwork and training
of staff. This stage will also include the
design of a database where information
will be organized and centralized
(CITES 2010a, p. 9).
To date, the preliminary design
proposes a monitoring effort with
biannual sampling throughout the range
of the species, with observations made
in at least three routes per defined
region (e.g. 12 regions in Mexico) using
nighttime counts. In addition, one of the
three routes per region will be selected
for capture-mark-recapture of
individuals and standard data/sample
collection, as well as nest location and
monitoring. Information obtained will
make it possible to estimate relative
abundance indices to detect variations
in the population in time, determine the
sex and age ratio and the general status
and activity of individuals, and obtain
data on the reproductive effort and
success of the species, and on habitat
critical for breeding (CITES 2010a, pp.
9–10).
Stage 2 will be implemented once the
monitoring program has been published.
It will consist of implementing the
actions decided, including setting up
and training the field teams, signing the
relevant cooperation agreements,
carrying out field work, and developing
the database. Information stored in the
database will be periodically analyzed
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to produce estimates of the population
and its trends in the short, medium, and
long term (CITES 2010a, pp. 9–10)
(CITES 2010a, p. 10). We do not have
any information on implementation
progress for the Tri-National Strategy,
and are seeking this information as part
of this proposed rule.
In Belize, Dr. Frank Mazzotti
(University of Florida) is collaborating
with the Belize Forestry Department to
develop a national crocodile
management program (The Croc Docs
2009, pp. 1–8). This project seeks to
develop, in collaboration with the
Lamanai Field Research Center, a
monitoring program for these species.
Along with the monitoring program, the
project will develop a training program
for government and nongovernment
personnel in Belize so that the
monitoring program can be maintained.
This long-term program has great
potential to provide ongoing
conservation benefits to the Morelet’s
crocodile in Belize. We do not have any
information on implementation progress
for this monitoring program in Belize,
and are seeking this information as part
of this proposed rule.
The Act requires the Service to
monitor the status of the species in
cooperation with the States. The Act
defines the term ‘‘State’’ as ‘‘any of the
several States, the District of Columbia,
the Commonwealth of Puerto Rico,
American Samoa, the Virgin Islands,
Guam, and the Trust Territory of the
Pacific Islands.’’ For species found
entirely outside of the United States and
therefore outside the areas defined as a
‘‘State’’ under the Act, we must
cooperate with the species’ range
countries to meet the post-delisting
monitoring requirements of the Act to
ensure that the species will maintain its
recovered status throughout its range
after the protections of Act are removed.
As the species experts, the range
countries are best qualified to develop
and implement a range-wide postdelisting monitoring plan for their
species. If this proposed rule is finalized
and the Morelet’s crocodile is delisted
under the Act, we will work with the
range countries to monitor the status of
the species throughout its range via
their implementation of the existing
monitoring requirements under CITES,
the Tri-national Strategy, the Belizean
monitoring program discussed above,
and any additional monitoring plans
that may be developed in the future.
Peer Review
In accordance with our joint peer
review policy with the National Marine
Fisheries Service, ‘‘Notice of Interagency
Cooperative Policy for Peer Review in
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Endangered Species Act Activities,’’ that
was published in the Federal Register
on July 1, 1994 (59 FR 34270), and the
Office of Management and Budget’s
Final Information Quality Bulletin for
Peer Review, dated December 16, 2004,
we will seek the expert opinions of at
least three appropriate independent
specialists regarding the science in this
proposed rule. The purpose of peer
review is to ensure that listing,
reclassification, and delisting decisions
are based on scientifically sound data,
assumptions, and analyses. We will
send copies of this proposed rule to the
peer reviewers immediately following
publication in the Federal Register. We
will invite these peer reviewers to
comment, during the public comment
period, on the specific assumptions and
conclusions in this proposed delisting
of the Morelet’s crocodile. We will
summarize the opinions of these
reviewers in the final decision
document, and we will consider their
input and any additional information
we received as part of our process of
making a final decision on this
proposal. Such communication may
lead to a final decision that differs from
this proposal.
Required Determinations
Clarity of the Rule
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We are required by Executive Orders
12866 and 12988 and by the
Presidential Memorandum of June 1,
1998, to write all rules in plain
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language. This means that each rule we
publish must:
(1) Be logically organized;
(2) Use the active voice to address
readers directly;
(3) Use clear language rather than
jargon;
(4) Be divided into short sections and
sentences; and
(5) Use lists and tables wherever
possible.
If you feel that we have not met these
requirements, send us comments by one
of the methods listed in the ADDRESSES
section. To better help us revise the
rule, your comments should be as
specific as possible. For example, you
should tell us the numbers of the
sections or paragraphs that are unclearly
written, which sections or sentences are
too long, the sections where you feel
lists or tables would be useful, etc.
National Environmental Policy Act
We have determined that an
environmental assessments or an
environmental impact statement, as
defined under the authority of the
National Environmental Policy Act of
1969 (42 U.S.C. 4321 et seq.), need not
be prepared in connection with
regulations adopted under section 4(a)
of the Act. A notice outlining our
reasons for this determination was
published in the Federal Register on
October 25, 1983 (48 FR 49244).
References Cited
A complete list of the references used
to develop this proposed rule is
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available upon request from the
Endangered Species Program in our
Headquarters office (see FOR FURTHER
INFORMATION CONTACT section).
List of Subjects in 50 CFR Part 17
Endangered and threatened species,
Exports, Imports, Reporting and
recordkeeping requirements,
Transportation.
Proposed Regulation Promulgation
Accordingly, we hereby propose to
amend part 17, subchapter B of chapter
I, title 50 of the Code of Federal
Regulations, as set forth below:
PART 17—[AMENDED]
1. The authority citation for part 17
continues to read as follows:
Authority: 16 U.S.C. 1361–1407; 16 U.S.C.
1531–1544; 16 U.S.C. 4201–4245; Public Law
99–625, 100 Stat. 3500; unless otherwise
noted.
§ 17.11
[Amended]
2. Amend § 17.11(h) by removing the
entry for ‘‘Crocodile, Morelet’s’’ under
‘‘REPTILES’’ from the List of Endangered
and Threatened Wildlife.
Dated: April 11, 2011.
Daniel M. Ashe,
Director, U.S. Fish and Wildlife Service.
[FR Doc. 2011–9836 Filed 4–26–11; 8:45 am]
BILLING CODE 4310–55–P
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Agencies
[Federal Register Volume 76, Number 81 (Wednesday, April 27, 2011)]
[Proposed Rules]
[Pages 23650-23683]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-9836]
[[Page 23649]]
Vol. 76
Wednesday,
No. 81
April 27, 2011
Part II
Department of the Interior
-----------------------------------------------------------------------
Fish and Wildlife Service
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50 CFR Part 17
Endangered and Threatened Wildlife and Plants; 12-Month Finding on a
Petition and Proposed Rule To Remove the Morelet's Crocodile From the
Federal List of Endangered and Threatened Wildlife; Proposed Rule
Federal Register / Vol. 76 , No. 81 / Wednesday, April 27, 2011 /
Proposed Rules
[[Page 23650]]
-----------------------------------------------------------------------
DEPARTMENT OF THE INTERIOR
Fish and Wildlife Service
50 CFR Part 17
[Docket No. FWS-R9-ES-2010-0030; 92210-1113-0000-C6]
RIN 1018-AV22
Endangered and Threatened Wildlife and Plants; 12-Month Finding
on a Petition and Proposed Rule To Remove the Morelet's Crocodile From
the Federal List of Endangered and Threatened Wildlife
AGENCY: Fish and Wildlife Service, Interior.
ACTION: Proposed rule.
-----------------------------------------------------------------------
SUMMARY: Under the authority of the Endangered Species Act of 1973, as
amended (Act), we, the U.S. Fish and Wildlife Service (Service),
announce a 12-month finding on a petition and a proposed rule to remove
the Morelet's crocodile (Crocodylus moreletii) throughout its range
from the Federal List of Endangered and Threatened Wildlife due to
recovery. This action is based on a thorough review of the best
available scientific and commercial data, including new information
that became available after we received the petition, which indicates
that the species' status had improved to the point that the Morelet's
crocodile is not likely to become threatened within the foreseeable
future throughout all or a significant portion of its range. If this
proposed rule is finalized, the Morelet's crocodile will remain
protected under the provisions of the Convention on International Trade
in Endangered Species of Wild Fauna and Flora. We are seeking
information, data, and comments from the public on this proposed rule.
DATES: To ensure that we are able to consider your comments on this
proposed rule, they must be received or postmarked on or before June
27, 2011. We must receive requests for public hearings, in writing, at
the address shown in the FOR FURTHER INFORMATION CONTACT section below
by June 13, 2011.
ADDRESSES: You may submit comments by one of the following methods:
Federal eRulemaking Portal: https://www.regulations.gov.
Search for docket number FWS-R9-ES-2010-0030 and then follow the
instructions for submitting comments.
U.S. mail or hand-delivery: Public Comments Processing,
Attn: FWS-R9-ES-2010-0030; Division of Policy and Directives
Management; U.S. Fish and Wildlife Service; 4401 N. Fairfax Drive,
Suite 222; Arlington, VA 22203.
We will not accept comments by e-mail or fax. We will post all
comments on https://www.regulations.gov. This generally means that we
will post any personal information you provide us (see the Public
Comments section below for more information).
FOR FURTHER INFORMATION CONTACT: Janine Van Norman, Chief, Branch of
Foreign Species, Endangered Species Program, U.S. Fish and Wildlife
Service, 4401 North Fairfax Drive, Room 420, Arlington, VA 22203,
U.S.A.; telephone 703-358-2171; facsimile 703-358-1735. Individuals who
are hearing-impaired or speech-impaired may call the Federal
Information Relay Service at 800-877-8339 for TTY assistance 24 hours a
day, 7 days a week.
SUPPLEMENTARY INFORMATION:
Public Comments
Any final action resulting from this proposed rule will be based on
the best scientific and commercial data available and be as accurate
and effective as possible. Therefore, we request comments or
information from other concerned government agencies, the scientific
community, industry, or other interested parties concerning this
proposed rule. The comments that will be most useful and likely to
influence our decisions are those supported by data or peer-reviewed
studies and those that include citations to, and analyses of,
applicable laws and regulations. Please make your comments as specific
as possible and explain the basis for them. In addition, please include
sufficient information with your comments to allow us to authenticate
any scientific or commercial data you reference or provide. In
particular, we seek comments concerning the following:
(1) New biological, trade, or other relevant information and data
concerning any threat (or lack thereof) to the Morelet's crocodile.
(2) New information and data on whether or not climate change is a
threat to the Morelet's crocodile, what regional climate change models
are available, and whether they are reliable and credible to use as
step-down models for assessing the effect of climate change on the
species and its habitat.
(3) The location of any additional populations of Morelet's
crocodile.
(4) New information and data concerning the range, distribution,
and population size and population trends of the Morelet's crocodile.
(5) New information and data on the current or planned activities
within the geographic range of the Morelet's crocodile that may affect
or benefit the species.
(6) New information and data concerning captive breeding operations
in Mexico, Belize, and Guatemala.
(7) New information and data on the Morelet's crocodile in
Guatemala that would enhance our analysis of whether this population
qualifies as a Distinct Population Segment under the Act (16 U.S.C.
1531 et seq.), and whether this population warrants continued
protection under the Act.
(8) Information and data concerning the status and results of
monitoring actions for the Morelet's crocodile, including those
implemented under the Convention on International Trade in Endangered
Species of Wild Fauna and Flora (CITES), the Belize-Guatemala-Mexico
Tri-national Strategy for the Conservation and Sustainable Use of
Morelet's Crocodile, and the Belizean monitoring plan that are
discussed under the Post-Delisting Monitoring section below.
(9) Information pertaining to Belize's efforts to fully enact
national legislation and/or their efforts to ensure Belize's compliance
with CITES.
Please note that submissions merely stating support for or
opposition to the action under consideration without providing
supporting information, although noted, will not be considered in
making a determination, as section 4(b)(1)(A) of the Endangered Species
Act of 1973, as amended (Act; 16 U.S.C. 1531 et seq.) directs that a
determination as to whether any species is an endangered or threatened
species must be made ``solely on the basis of the best scientific and
commercial data available.''
Prior to issuing a final rule on this proposed action, we will take
into consideration all comments and any additional information we
receive. Such information may lead to a final rule that differs from
this proposal. All comments and recommendations, including names and
addresses, will become part of the administrative record.
You may submit your comments and materials concerning this proposed
rule by one of the methods listed in the ADDRESSES section. We will not
consider comments sent by e-mail or fax or to an address not listed in
the ADDRESSES section. If you submit a comment via https://www.regulations.gov, your entire comment--including any personal
identifying information--will be posted on the Web site. Please note
that comments posted to this Web site are not immediately viewable.
When you submit a comment, the system receives
[[Page 23651]]
it immediately. However, the comment will not be publicly viewable
until we post it, which might not occur until several days after
submission.
If you mail or hand-deliver a hardcopy comment that includes
personal identifying information, you may request at the top of your
document that we withhold this information from public review. However,
we cannot guarantee that we will be able to do so. To ensure that the
electronic docket for this rulemaking is complete and all comments we
receive are publicly available, we will post all hardcopy submissions
on https://www.regulations.gov.
In addition, comments and materials we receive, as well as
supporting documentation used in preparing this proposed rule, will be
available for public inspection in two ways:
(1) You can view them on https://www.regulations.gov. In the Enter
Keyword or ID box, enter FWS-R9-ES-2010-0030, which is the docket
number for this rulemaking.
(2) You can make an appointment, during normal business hours, to
view the comments and materials in person at the U.S. Fish and Wildlife
Service's Endangered Species Program located in our Headquarters office
(see FOR FURTHER INFORMATION CONTACT).
Public Availability of Comments
Before including your address, phone number, e-mail address, or
other personal identifying information in your comment, you should be
aware that your entire comment--including your personal identifying
information--might be made publicly available at any time. While you
can ask us in your comment to withhold your personal identifying
information from public review, we cannot guarantee that we will be
able to do so.
Public Hearing
Section 4(b)(5)(E) of the Act provides for one or more public
hearings on this proposed rule, if requested. We must receive requests
for public hearings, in writing, at the address shown in the FOR
FURTHER INFORMATION CONTACT section by the date shown in the DATES
section of this document. We will schedule public hearings on this
proposal, if any are requested, and announce the dates, times, and
places of those hearings, as well as how to obtain reasonable
accommodations, in the Federal Register at least 15 days before the
first hearing.
Background
Section 4(b)(3)(A) of the Act requires the Service to make an
initial finding as to whether a petition to list, delist, or reclassify
a species has presented substantial information indicating that the
requested action may be warranted. To the maximum extent practicable,
the finding shall be made within 90 days following receipt of the
petition and published promptly in the Federal Register. If the 90-day
finding is positive--that is, the petition has presented substantial
information indicating that the requested action may be warranted--
section 4(b)(3)(A) of the Act requires the Service to commence a status
review of the species if one has not already been initiated under the
Service's internal candidate assessment process. In addition, section
4(b)(3)(B) of the Act requires the Service to make a finding within 12
months following receipt of the petition on whether the requested
action is warranted, not warranted, or warranted but precluded by
higher-priority listing actions. That finding is referred to as the
``12-month finding.''
Previous Federal Actions
The Morelet's crocodile was listed as endangered throughout its
entire range under the predecessor of the Act via a rule published in
the Federal Register on June 2, 1970 (35 FR 8491). Import into, export
from, or re-export from the United States, as well as other
prohibitions, including movement in the course of a commercial activity
and sale in interstate or foreign commerce, of endangered species and
their parts and products, are prohibited under the Act unless otherwise
authorized. Authorizations for endangered species can only be made for
scientific purposes or to enhance the propagation or survival of the
species. On July 1, 1975, the Morelet's crocodile was listed in
Appendix I of CITES. These protections were put in place because the
species had suffered substantial population declines throughout its
range due to habitat destruction and overexploitation through the
commercial crocodilian skin trade. CITES Appendix I includes species
that are ``threatened with extinction which are or may be affected by
trade.''
On May 26, 2005, the Service received a petition from the
Government of Mexico's Comisi[oacute]n Nacional para el Conocimiento y
Uso de la Biodiversidad (CONABIO 2005) to remove the Morelet's
crocodile from the List of Endangered and Threatened Wildlife at 50 CFR
17.11.
Based on the information provided, the Service's 90-day finding on
the petition, which was published in the Federal Register on June 28,
2006 (71 FR 36743), stated that the petition provided substantial
information to indicate that the requested action may be warranted. In
that finding, we announced that we had initiated a status review of the
species as required under section 4(b)(3)(A) of the Act, and that we
were seeking comments on the petition, as well as information on the
status of the species, particularly in Belize and Guatemala. The
Service also solicited comments or additional information from
counterparts in Mexico, Belize and Guatemala.
This proposed rule to delist the Morelet's crocodile throughout its
range also constitutes our 12-month finding that the petitioned action
is warranted.
Species Information
Three species of crocodilians occur in Mexico and Central America.
The Morelet's crocodile and the American crocodile (Crocodylus acutus)
co-occur in Mexico, Belize, and Guatemala (Schmidt 1924, pp. 79 and 85;
Stuart 1948, p. 45). While their ranges overlap, the American crocodile
has a much larger range than the Morelet's crocodile, and is found in
the United States in the State of Florida, as well as in the Caribbean,
on Pacific and Atlantic coasts of Central America and northern South
America in Venezuela, Colombia, Ecuador, and northern Peru. A third
species, the common or spectacled caiman (Caiman crocodilus) occurs in
Mexico and Guatemala, but is absent from Belize. The distribution of
the common caiman also extends into northern South America (Ross 1998,
pp. 14-17; Thorbjarnarson 1992, pp. 82-85). The Morelet's crocodile was
named after a French naturalist, P.M.A. Morelet (1809-1892), who
discovered this species in Mexico in 1850 (Britton 2008, p. 1). The
type locality of the species was later restricted to ``Guatemala, El
Peten, Laguna de Peten'' when the species was scientifically described.
In Mexico, the Morelet's crocodile is known as ``lagarto'' or ``swamp
crocodile'' (Rodriguez-Quivedo et al, 2008).
The Morelet's crocodile is a ``relatively small species'' that
usually attains a maximum length of approximately 9.8-11.5 ft (3-3.5 m
(S[aacute]nchez (2005, p. 4); Britton (2008, p. 1)), with most wild
adults ranging in length 6.6-8.2 ft (2-2.5 m). Hurley (2005, p. 2),
however, reported specimens attaining 15.4 ft (4.7 m). Platt and
Rainwater (2005, p. 25) stated that size estimates where shorter
lengths were documented were probably based on populations that had
been heavily impacted by hunting and which now contained few large
adults. The Morelet's crocodile is distinguished
[[Page 23652]]
from other crocodiles, particularly the partially sympatric (having the
same or overlapping distribution) and somewhat larger American
crocodile, by the number of dorsal scales in each transverse row on its
back, the number and arrangement of nuchal scales (located at the nape
of the neck), and irregular scales on the ventrolateral (lower side)
surface of the tail (Meerman 1994, p. 110; Navarro Serment 2004, pp.
55-56; Platt and Rainwater 2005, p. 27; Hern[aacute]ndez Hurtado et al.
2006, p. 376; Platt et al. 2008b, p. 294). The Morelet's crocodile has
six nuchal scales of similar size compared to other crocodile species,
which have either four nuchal scales or four large nuchal scales and
two small ones (CITES 2010a, p.11). Unlike most other species of
crocodilians, the Morelet's crocodile lacks bony plates beneath the
skin (osteoderms), making their skin more valuable as leather (Hurley
2005, p. 9). Adults have a yellowish-olive black skin, usually showing
big black spots at the tail and at the back area, which in some adults
can be entirely black. The ventral (underside) area is light in color,
with a creamy yellowish tone. A thick and soft skin has made the
Morelet's crocodile desirable for commercialization (CITES 2010a, p.
3).
Opportunistic carnivores, juvenile Morelet's crocodiles feed on
small invertebrates, especially insects and arachnids, while subadults
eat a more diverse diet including mollusks, crustaceans, fish,
amphibians, and small reptiles. Adult crocodiles consume reptiles,
birds, and mammals (Platt et al. 2002, p. 82; S[aacute]nchez 2005, p.
7; Platt et al. 2006, pp. 283-285; CITES 2008, p. 9, CITES 2010a, p.
3). This species is also known to exhibit necrophagy (consumption of
dead animal carcasses over an extended period (several days)) and
interspecific kleptoparasitism (stealing of food from an individual by
another individual) (Platt et al. 2007, p. 310).
Morelet's crocodiles attain sexual maturity at about 4.9 ft (1.5 m)
in length, at approximately 7-8 years of age. A growth rate of 0.63
inches (in) per month (1.6 centimeters (cm) per month) was observed in
Morelet's crocodiles during the first 3 years of life under protected
conditions in Mexico, while a rate of 0.94-1.18 in per month (2.4-3.0
cm per month) was achieved under farming conditions (P[eacute]rez-
Higareda et al. 1995, p. 173). Adult females build nests and lay 20-40
eggs per clutch (Hurley 2005, p. 3; S[aacute]nchez 2005, p. 6), with an
average of 35 eggs per clutch (CITES 2008, p. 9, CITES 2010a, p. 3).
Nests, usually constructed of leaf mounds at the beginning of the wet
season (April-June), are located on the shores of freshwater wetlands,
as well as in coastal lagoons and mangrove patches (Platt et al. 2008a,
pp. 179-182).
An analysis based on DNA microsatellite data from hatchlings
collected at 10 Morelet's crocodile nests in Belize showed that progeny
from five of the 10 nests were sired by at least two males (McVay et
al. 2008, p. 643). These data suggested that multiple paternity was a
mating strategy for the Morelet's crocodile and was not an isolated
event. In addition, this information may be useful in the application
of conservation and management techniques for the species.
The eggs of Morelet's crocodiles hatch in September-October, 65-90
days after they are laid. Females attend the nest during incubation,
and can assist the newborns to leave the nest. Both parents protect
juveniles against predators and other adult crocodiles (CITES 2010a, p.
3). Nest failures due to flooding and predation, both avian and
mammalian, are common (Platt et al. 2008a, p. 184). Expected lifespan
in the wild is 50-65 years (Hurley 2005, p. 4.) The Morelet's crocodile
exhibits and shares with other crocodilians many acoustic and visual
signals that convey reproductive, territorial, and other types of
information (Senter 2008, p. 354).
The Morelet's crocodile occurs primarily in freshwater environments
such as lakes, swamps, and slow-moving rivers, but can temporarily
inhabit intermittent freshwater bodies, such as flooded savannahs, and
occasionally observed in brackish coastal lagoons (Villegas 2006, p.
8). Floating and emergent vegetation provide cover to protect young
crocodiles from predators, including cannibalism by adult crocodiles
(S[aacute]nchez 2005, p. 7). In contrast to the Morelet's crocodile,
the American crocodile feeds mainly on fish and occurs primarily in
coastal or brackish environments, such as coastal mangrove swamps,
brackish and salt water bays, lagoons, marshes, tidal rivers, and
brackish creeks. American crocodiles can also be found in abandoned
coastal canals and borrow pits and may range inland into freshwater
environments preferred by the Morelet's crocodile such as lakes and
lower reaches of large rivers. American and Morelet's crocodiles have
been known to lay eggs within the same nest mound as conspecifics,
suggesting a more gregarious and tolerant demeanor (Brien et al. 2007,
pp. 17-18).
The historical distribution of the Morelet's crocodile comprised
the eastern coastal plain of Mexico, most of the Yucatan Peninsula,
Belize, and northern Guatemala (Hurley 2005, p. 1), with an estimated
historical distribution covering 173,746 mi\2\ (450,000 km\2\) (Sigler
and Dom[iacute]nguez Laso 2008, pp. 11-12). Based on the analyses
conducted for the petition, approximately 51 percent of the original
geographic distribution in Mexico remains undisturbed, while
approximately 49 percent is disturbed or altered. In linear terms, the
amount of undisturbed shoreline habitat available in Mexico to the
Morelet's crocodile is about 15,534 mi (25,000 km) of shoreline, which
is approximately 72 percent of the total undisturbed shoreline habitat
available throughout the species' range. According to CONABIO, the
amount of undisturbed shoreline habitat available to the Morelet's
crocodile in Belize and Guatemala is estimated to be 2,050 mi (3,300
km) and 4,163 mi (6,700 km), respectively, or 9 and 19 percent of the
total undisturbed shoreline habitat available throughout the species'
range (CONABIO 2005, pp. 16-19).
Historical estimates of total population sizes in the three range
countries are unavailable or imprecise, and we were not able to find
any additional data on historical, range-wide population estimates for
the species. While not quantifiable or documented by field surveys, Lee
(1996, p. 134) characterized the historical distribution and abundance
of the Morelet's crocodile in the Yucatan Peninsula of Mexico as
follows: ``Throughout its range, nearly every local aguada (flood) has
(or had) its lagarto, which generally proves to be C. moreletii.'' The
same probably could be said about Belize and Guatemala.
It has been widely reported, however, that by the middle of the
20th Century, populations of Morelet's crocodiles were widely depleted
due primarily to overharvest for commercial purposes during the 1940s-
1950s. In ``Crocodiles: An action plan for their conservation,''
Thorbjarnarson (1992, p. 68 and the references cited therein)
characterized the Mexican populations of Morelet's crocodiles in the
early 1990s as very depleted in the Mexican States of Tamaulipas and
Veracruz, recovering to some degree and viable in northeastern Mexico,
and severely threatened in Tabasco State and Campeche State. However,
populations of Morelet's crocodiles were not depleted in southern
Chiapas State and eastern Quintana Roo State (Sian Ka'an Biosphere
Reserve).
Few historical estimates for the Morelet's crocodile in Belize are
available, but based on surveys during 1978 and 1979, Abercrombie et
al.
[[Page 23653]]
(1980, p. 103) reported that very few adults were observed in areas
where they had previously been relatively abundant. This condition was
attributed to overexploitation (i.e., commercial trade in hides).
Thorbjarnarson (1992, p. 55) characterized the Morelet's crocodile
populations in the early 1990s as generally depleted in the northern
part of Belize, but relatively abundant in several other areas.
Abercrombie et al. estimated the total population of Morelet's
crocodiles older than 9 months of age in Belize at 2,200-2,500
individuals (Abercrombie et al. 1982, p. 16). Nothing was known in the
scientific literature at that time about populations in the southern
part of Belize. The only available countrywide estimates for the
Morelet's crocodile in Belize suggested a total population size of
25,000-30,000 individuals that was declining in number in 1945, was
near depletion between 1970 and 1980, and, in response to several
protective measures, had undergone a slow recovery by 2000 to about
20,000 individuals (Finger et al. 2002, p. 199).
Thorbjarnarson (1992, p. 64) characterized the Guatemalan
populations in the early 1990s as depleted, but capable of recovery. He
indicated that 75 individuals had been reported at three lakes in the
Pet[eacute]n Region, in the northern portion of the country, and that
Morelet's crocodiles were known to be common in other parts of that
region.
By the late 1990s, little had changed with regard to our knowledge
of the distribution and abundance of the Morelet's crocodile. In
``Crocodiles: Status survey and conservation action plan (second
edition),'' Ross (1998, pp. 46-47) characterized several populations of
Morelet's crocodiles in all three countries as depleted. In some areas,
however, including the Lacand[oacute]n Forest (Chiapas State, Mexico)
and the Sian Ka'an Biosphere Reserve (Quintana Roo State, Mexico),
healthy populations of the Morelet's crocodile existed. These findings
were based on anecdotal reports and incidental records; numerical data
were not readily available.
Based on extrapolations of habitat relationships (e.g., vegetation
type, size of wetland/riverine feature, and disturbance factors;
described in more detail in CONABIO 2005, pp. 16-19) and frequency of
encounter rates (derived from country-specific field research), the
potential global population of free-ranging Morelet's crocodiles in
2004 was estimated to be 102,432 individuals (all age classes; 79,718
individuals in Mexico, 8,803 in Belize, and 13,911 in Guatemala),
including approximately 19,400 adults (CONABIO 2005, pp. 17-19).
Summary of Factors Affecting the Species
Section 4 of the Act and its implementing regulations, 50 CFR part
424, set forth the procedures for listing, reclassifying, or removing
species from the Federal Lists of Endangered and Threatened Wildlife
and Plants. ``Species'' is defined by the Act as including any species
or subspecies of fish or wildlife or plants, and any distinct
vertebrate population segment of fish or wildlife that interbreeds when
mature (16 U.S.C. 1532(16)). Once the ``species'' is determined, we
then evaluate whether that species may be endangered or threatened
because of one or more of the five factors described in section 4(a)(1)
of the Act. We must consider these same five factors in reclassifying
or delisting a species. For species that are already listed as
endangered or threatened, the analysis of threats must include an
evaluation of both the threats currently facing the species, and the
threats that are reasonably likely to affect the species in the
foreseeable future following the delisting or downlisting and the
removal or reduction of the Act's protections. We may delist a species
according to 50 CFR 424.11(d) if the best available scientific and
commercial data indicate that the species is neither endangered nor
threatened for the following reasons: (1) The species is extinct; (2)
the species has recovered and is no longer endangered or threatened;
and/or (3) the original scientific data used at the time the species
was classified were in error.
Factor A. Present or Threatened Destruction, Modification, or
Curtailment of the Species' Habitat or Range
The overharvest for commercial purposes, rather than habitat
destruction or modification, was the primary reason for the Morelet's
crocodile being listed under the Act and its inclusion in CITES.
However, the Five Factor Analysis under the Act requires an analysis of
current and future potential impacts to the species based on
modification or destruction of habitat.
The petition (CONABIO 2005) highlights habitat degradation as a
potential threat, especially if it involves lack of prey and eventual
contamination of water bodies. Currently, the extent of habitat
degradation is estimated to be moderate in Mexico and Belize, and
slightly higher in northern Pet[eacute]n, Guatemala (CONABIO 2005,
Annex 1, p. 10). However, as stated previously, historical estimates of
range-wide habitat destruction for the Morelet's crocodile are
unavailable or imprecise. We found that the data on habitat destruction
was primarily presented separately for each individual country.
Therefore, the following analysis of the potential threats to the
species from habitat destruction or modification first presents the
specific information available for the Morelet's crocodile in each
country, and then presents the general information that was available
for the species as a whole.
Mexico
The Morelet's crocodile is known historically from 10 states in
Mexico (from east to west): Quintana Roo, Yucat[aacute]n, Campeche,
Chiapas, Tabasco, Veracruz, Oaxaca, Hidalgo, San Luis Potos[iacute],
and Tamaulipas ([Aacute]guilar 2005, p. 2). Based on available
information and interviews during a 1995 site visit to Mexico by the
IUCN Crocodile Specialist Group, Ross (1998, p. 13) suggested ``with
some confidence'' that the Morelet's crocodile was widely distributed
throughout most of its original range. At the request of the
petitioner, these states were resurveyed to assess current Morelet's
crocodile populations in those areas.
Surveys conducted between 2000 and 2004 documented the widespread
distribution and relative abundance of wild populations of the
Morelet's crocodile in Mexico (Dom[iacute]nguez-Laso et al. 2005, pp.
21-30; also summarized in S[aacute]nchez Herrera 2000, pp. 17-19;
CONABIO 2005, pp. 11-13 and Annex 5; S[aacute]nchez Herrera and
[Aacute]lvarez-Romero 2008, page 415; Garc[iacute]a et al. 2007, pp.
31-32; Sigler and Dom[iacute]nguez Laso 2008, pp. 11-13). Surveys found
Morelet's crocodiles at 63 sites across all 10 Mexican states
comprising the species' entire historic range in Mexico (CONABIO 2005,
p. 12). Habitat evaluations based on five environmental components
rated habitat quality as excellent at 10 sites (24 percent), or as
favorable or suitable at 24 sites (57 percent). Furthermore, evidence
of the presence of the Morelet's crocodile was found in cultivated
areas and at sites with ``intermediate'' quality habitats (CONABIO
2005, p. 13). This suggested that the Morelet's crocodile does not
require undisturbed habitat in order to occupy a site. Habitat mapping
resulted in an estimated minimum of 15,675 mi (25,227 km) of shoreline
as suitable Morelet's crocodile habitat in Mexico, which is 72 percent
of the estimated suitable shoreline habitat available throughout the
species range (CONABIO 2005, pp. 14-16).
[[Page 23654]]
Population characteristics of the Morelet's crocodiles in Mexico
were also determined during the 2000-2004 field surveys. All age
classes were well represented (34 percent juveniles; 47 percent
subadults; and 19 percent adults), indicating good recruitment
(Dom[iacute]nguez-Laso et al. 2005, p. 31). A higher proportion of
males to females (1.55 to 1 overall versus about 1 male per female) was
observed in all age classes, except older subadults (Dom[iacute]nguez-
Laso et al. 2005, pp. 33-34). Mean frequency of encounter, based on 62
localities surveyed--excluding one outlier site with an atypically
large crocodile population--was 5.76 individuals per 0.62 mi (= 1
kilometer (km)) of shoreline (mode = 3.16 individuals per km);
Dom[iacute]nguez-Laso et al. 2005, pp. 30, 40). These frequency of
encounter rates were similar to those reported for other sites, for
example: (1) Sigler et al. (2002, p. 222) reported rates of 8.33-18.5
individuals per km at various sites throughout Mexico and commented
that these were the highest rates ever reported for that country; (2)
Cede[ntilde]o-V[aacute]zquez (2002, p. 353) reported rates of 1-2
individuals per km, when present (22 of 40 surveys; 711 individuals
counted; all age classes represented; hatchlings in September), at
Bahia de Chetumal and R[iacute]o Hondo, Mexico (n = 17 sites) and
commented on the recovery of the species; (3) Cede[ntilde]o-
V[aacute]zquez et al. (2006, p. 15) reported rates of 7.6 and 5.3
individuals per km at La Arrigue[ntilde]a, Campeche State, and
commented that this suggested a healthy population. A population
estimate--based on (a) extrapolations of 3.16 individuals per km, (b)
19 percent adults, and (c) a cautious estimate of occupied habitat
(15,675 mi (25,227 km) of river habitat)--produced a result of
approximately 79,718 wild individuals (all ages) in Mexico comprising
78 percent of the total wild population, including approximately 15,146
adults in Mexico (Dom[iacute]nguez-Laso 2005, p. 40).
New information now available to the Service documents updates in
the geographic distribution of the Morelet's crocodile in Mexico.
Because of several unauthorized introductions or escapes from captive-
breeding facilities in areas outside of the reported range of the
species, the Morelet's crocodile has become established in the wild at
three sites: Chacahua, Oaxaca State; Villa Flores, Chiapas State; and
Laguna de Alcuzahue, Colima State ([Aacute]lvarez Romero et al. 2008,
p. 415). Several captive-breeding facilities along the Pacific coast in
western Mexico contain Morelet's crocodiles. These facilities are
located in areas outside of the reported range of the species, but
potentially with appropriate habitat for this species. Concerns have
been raised about these introductions and the potential negative
impacts of this ``exotic'' or ``invasive'' species on the local biota
([Aacute]lvarez Romero et al. 2008, pp. 415 and 417). The Government of
Mexico is making efforts to diagnose potential threats to the native
American crocodile caused by hybridization with the introduced
Morelet's crocodile on the Pacific coast of Mexico. The goal of these
efforts is to generate morphological and molecular identification
materials and study the population dynamics of the American crocodile.
It will include monitoring and harvest of Morelet's crocodiles and
hybrids for scientific research (CITES 2010a, p. 6).
According to the information presented in CONABIO 2005, the
Morelet's crocodile in Mexico occupies at least 12 protected areas
(CONABIO 2005, p. 30 and Annex 6). Part of the Sistema Nacional de
[Aacute]reas Naturales Protegidas (SINANP or National System of
Protected Natural Areas, described more fully in the Factor D section,
Inadequacy of Existing Regulatory Mechanisms), encompasses 13 percent
of the species' range and include the following areas: Los Tuxtlas
Biosphere Reserve, Pantanos de Centla Biosphere Reserve, Laguna de
T[eacute]rminos Biosphere Reserve, Hampolol Wildlife Conservation and
Research Center, El Palmar State Preserve, R[iacute]a Lagartos
Biosphere Reserve, Yum Balam Biosphere Reserve, Laguna Nichupte, Sian
Ka'an Biosphere Reserve, Bahia Chetumal (Bay) and R[iacute]o Hondo
(River).
The Government of Mexico's 2010 CITES proposal to transfer the
Morelet's crocodile from CITES Appendix I to CITES Appendix II provided
updated information on the number of protected areas for the Morelet's
crocodile in Mexico. About 77 Federal and certified protected areas in
Mexico provide shelter and legal protection to the Morelet's crocodile
in its potential range. Of these, 11 have records of the species
covering 7,763,147 acres (ac) (3,141,634 hectares (ha)) (CITES 2010a,
pp. 11, 17-20). The Government of Mexico designated eight of the eleven
protected areas containing Morelet's crocodiles as Biosphere Reserves,
and the three remaining protected areas containing Morelet's crocodiles
as Flora and Fauna Protection Areas. As stated above, these protected
areas are part of SINANP (described more fully in the Factor D section,
Inadequacy of Existing Regulatory Mechanisms).
The Government of Mexico's 2010 CITES proposal used both a
narrative description (CITES 2010a, p. 11) and a list (CITES 2010a, pp.
17-20) to indicate that there are 11 federally protected areas in
Mexico containing Morelet's crocodile. CONABIO 2005 used a narrative
description (CONABIO 2005, p. 30) to indicate that there are at least
12 federally protected areas in Mexico containing Morelet's crocodile
(CONABIO 2005, p. 30), but did not include a list of the federally
protected areas. Based on the information available to the Service, we
were unable to find any additional data to explain the difference
between in the numbers of federally protected areas cited in these two
documents. The Government of Mexico's 2010 CITES proposal is the more
recent document, and we consider it to contain the best available
scientific and commercial data on the number of federally protected
areas in Mexico.
The Convention on Wetlands of International Importance especially
as Waterfowl Habitat (also known as the Ramsar Convention) is an
intergovernmental treaty that provides a framework for international
cooperation for the conservation of wetland habitats. CONABIO 2005 did
not provide information on whether the Ramsar Convention protects any
Morelet's crocodile habitat in Mexico. However, this information was
included in the Government of Mexico's 2010 CITES proposal. According
to their 2010 CITES proposal, there are 41 Ramsar sites in the
potential range of the Morelet's crocodile in Mexico, 13 of which have
records of the species covering 6,779,875 ac (2,743,718 ha) (CITES
2010a, pp. 11, 17-20).
According to the information presented in CONABIO 2005, one of the
main potential threats to the Morelet's crocodile is habitat
destruction and fragmentation due to residential and infrastructure
development, such as dams, roads, residential areas, and irrigated
fields (CONABIO 2005, Annex 2, pp. 4-5). The information presented in
CONABIO 2005 indicated that land reform and the ensuing colonization of
undeveloped areas is a potential threat to the Morelet's crocodile, but
the Government of Mexico has no such actions planned at this time
(CONABIO 2005, p. 33). This threat of habitat degradation is
ameliorated in Mexico by the Ley General de Equilibrio Ecol[oacute]gico
y Protecci[oacute]n al Ambiente (LGEEPA; General Ecological Equilibrium
and Environmental Protection Law). This 1988 law has strict
restrictions against land use changes in Mexico, especially for
undisturbed habitat such as those areas used by the Morelet's crocodile
(CONABIO 2005, p. 25). This law is supported by several others in
Mexico
[[Page 23655]]
that ensure the conservation of native flora and fauna in Mexico (see
discussion in the Factor D section, Inadequacy of Existing Regulatory
Mechanisms; also see CONABIO 2005, Annex 3).
According to the information presented by CONABIO, even in the
historic context of prolonged habitat alteration, wild populations of
Morelet's crocodiles remained abundant; so much so that large,
commercial exploitation of the species was occurring up until Federal
and international protections were put in place 40 years ago.
Alteration of Morelet's crocodile habitat occurring since then may have
produced some additional reductions in local populations, but these
reductions are not comparable to those of the past. In addition, even
in areas where changes to the original environment are not reversible,
evidence points to a certain degree of tolerance by Morelet's
crocodiles, especially when the habitat alterations are a result of
agriculture or low technology livestock production (CONABIO 2005, p.
25).
Based on surveys, it appears that the Morelet's crocodile in Mexico
occurs in all 10 states from where it traditionally has been reported
(CONABIO 2005, pp. 11-19). Although approximately 49 percent of the
original range in Mexico has been altered, much of the altered habitat
is still occupied by the Morelet's crocodile. Approximately 77,220
mi\2\ (200,000 km\2\) of undisturbed habitat remains in Mexico, which
is equivalent to approximately 15,534 mi (25,000 km) of shoreline. The
Government of Mexico protects habitat occupied by the Morelet's
crocodile in 11 areas designated by the Government of Mexico as either
Biosphere Reserves or Flora and Fauna Protection Areas covering a total
of 7,763,147 ac (3,141,634 ha). In addition, the Ramsar Convention
protects Morelet's crocodile habitat at 13 sites in Mexico covering
6,779,875 ac (2,743,718 ha). We do not have any information or data on
the amount of geographic overlap, if any, between the areas of habitat
protected by the Government of Mexico versus that protected by the
Ramsar Convention. Therefore, we considered these two protection
mechanisms as providing separate, but complimentary, habitat protection
as part of our analysis of habitat protection under this proposed rule.
We find that the information presented in the petition, as well as
the additional information available to the Service, represents the
best available scientific and commercial data on habitat destruction or
modification for Morelet's crocodiles in Mexico. Although moderate
habitat destruction or modification is currently affecting local
populations of Morelet's crocodiles in Mexico, and this is likely to
continue in the foreseeable future, these activities would not have a
significant impact on the species because they would be subject to
conservation measures under the Government of Mexico's regulatory
framework. This framework will continue to provide adequate protection
to the Morelet's crocodile and its habitat in the foreseeable future.
Surveys conducted found Morelet's crocodiles at 63 sites across all 10
Mexican states comprising the species' entire historic range in Mexico
(CONABIO 2005, p. 12). Given that Mexico contains more than 85 percent
of the species' natural range, an estimated 78 percent of all wild
individuals, that 7,763,147 ac (3,141,634 ha) of habitat are protected
by the Government of Mexico, and that 6,779,875 ac (2,743,718 ha) of
habitat are protected by the Ramsar Convention, we conclude that
habitat destruction or modification is neither a threat, nor is it
anticipated to significantly impact the Morelet's crocodile in Mexico
in the foreseeable future.
Belize
The Morelet's crocodile was historically known from all six states
in Belize (from north to south): Corozal, Orange Walk, Belize, Cayo,
Stann Creek, and Toledo (Anonymous 1998). According to information
provided by CONABIO, virtually all of the country contained suitable
habitat for the species. The style of economic development in Belize
has not required massive alteration of the natural environment. Thus,
in general, no extensive and drastic alteration of Morelet's crocodile
habitat has occurred in Belize (CONABIO 2005, p. 26). The current
amount of altered versus unaltered current habitat for the Morelet's
crocodile in Belize is unknown, but the petitioners estimated the
current amount of potentially suitable habitat to be approximately
2,050 mi (3,300 km) of shoreline (CONABIO 2005, pp.14-19).
While the species is widespread in the northern portion of the
country, it is naturally limited to a narrow region of lowlands along
the coast in the southern part of Belize, which is otherwise
mountainous (Schmidt 1924, p. 80; Abercrombie et al. 1982, pp. 12-16;
Platt et al. 1999, p. 395; Platt and Thorbjarnarson 2000a, pp. 25-26).
Although the Government of Belize was not a party to the petition,
teams not associated with the Mexican effort to delist the species
recently surveyed these states, in part, to assess Morelet's crocodile
populations in those areas. Based on recent surveys, all six districts
historically known to contain Morelet's crocodiles were surveyed in a
general characterization of the biodiversity of Belize (Boles 2005, p.
4; Belize Forest Department 2006, p. 22; Biological-Diversity.info
website 2009). At Spanish Creek Wildlife Sanctuary, in the north-
central part of the country, Meerman et al. (2004, pp. 23-24 and 30-32)
determined that the Morelet's crocodile was fairly common at the site
(frequency of encounter rate = 1.4-2.4 individuals per km). At
Mayflower Bocawina National Park, near the coast in the southeastern
part of the country, Meerman et al. (2003b, p. 30) unexpectedly located
the Morelet's crocodile at fast-flowing streams such as Silk Grass
Creek. While this specimen could have been introduced at the site, its
occurrence could also be natural. Along the Macal River, in west-
central Belize, Stafford et al. (2003, pp. 18 and 20) located a
breeding population of the Morelet's crocodile (frequency of encounter
rate = 1.48 individuals per km) (2001) and 1.25 individuals per km
(2002) at a mountainous site at 1,476 ft (450 m) elevation (higher than
expected). A total population size at the Macal River site was
calculated to be, at minimum, about 94 individuals (Stafford et al.
2003, p. 19).
Earlier comparisons between spotlight surveys conducted in northern
Belize in 1979-1980 and 1992-1997 also showed that Morelet's crocodiles
were widely distributed and relatively abundant across several habitat
types and levels of human accessibility (Platt and Thorbjarnarson
2000b, p. 23). In addition to an extensive system of nature reserves
including significant areas of crocodile habitat, these researchers
noted relatively high Morelet's crocodile encounter rates in wetlands
surrounding sugarcane fields in this area. Morelet's crocodiles were
observed in canals and ditches within the municipal limits of Belize
City and Orange Walk, as well as in wetlands easily accessible from
many villages (Platt and Thorbjarnarson 2000b, p. 23).
Population characteristics of Morelet's crocodiles in Belize were
also determined during these surveys. Size class distribution--25.4
percent adults in the 1990s, compared with 5-10 percent in an earlier
study--was consistent with population recovery from past
overexploitation (Platt and Thorbjarnarson 2000b, p. 24). Platt and
Thorbjarnarson (2000b, pp. 23, 26) reported an overall frequency of
encounter of 1.56 individuals per km; encounter rates were much higher
in
[[Page 23656]]
nonalluvial (8.20 individuals per km) and alluvial (6.11 individuals
per km) lagoons than in rivers and creeks (0.95 individuals per km) or
in mangrove habitats (0.24 individuals per km). While a significant,
male-biased sex ratio (5.3 males per 1 female versus about 1 male per
female) was identified, the reasons were unclear (Platt and
Thorbjarnarson 2000a, pp. 23, 27). Based on extrapolations of habitat
relationships in Mexico (which results in an estimated 2,080 mi (3,347
km) of potential habitat in Belize) and an average frequency of
encounter of 2.63 individuals per km, CONABIO stated that these results
suggested a total Belize population estimate for the Morelet's
crocodile of about 8,803 individuals in the wild (all age classes),
comprising 9 percent of the total wild population, including about
1,673 adults (CONABIO 2005, p. 18). Although this is not a typically
constructed population estimate, this estimate constitutes the best
available scientific and commercial data for the nationwide abundance
of Morelet's crocodiles in Belize. Although Platt suggested that these
overall values for Belize may be somewhat inflated because habitat in
southern Belize is less suitable for Morelet's crocodiles than areas in
the north (Platt 2008, pers. comm.), frequency of encounter values for
Morelet's crocodile populations and total population sizes in Belize
may have further increased due to continued protection for over a
decade since these surveys in the 1990s. Boles (2005, p. 4) and Belize
Forest Department (2006, p. 22), based on countrywide analyses, both
suggested that the Morelet's crocodile had ``recovered'' in Belize and
could be categorized as ``healthy.''
CONABIO did not present information about the distribution and
abundance of the Morelet's crocodile in protected areas in Belize.
Other information obtained by the Service, however, suggests that the
species is present in many protected areas in Belize, including:
Sarstoon Temash National Park (Meerman et al. 2003a, p. 45), Mayflower
Bocawina National Park (Meerman, et al. 2003b, p. 30), and Spanish
Creek Wildlife Sanctuary (Meerman et al. 2004, pp. 30-31). Overall,
about 18-26 percent of the national territory of Belize is under some
form of protection (BERDS 2005b, p. 1; Young 2008, p. 29). In several
of these protected areas, natural resource extraction is permitted from
the site, thus potentially limiting their contribution to the
conservation status of the Morelet's crocodile. However, we have no
evidence that resource extraction in these Belizean protected areas is
currently or anticipated to affect significantly the Morelet's
crocodile.
We find that the data presented by CONABIO, and additional data
available to the Service, represents the best available scientific and
commercial data on habitat destruction or modification for Morelet's
crocodiles in Belize. Although habitat destruction or modification is
currently affecting some local populations of Morelet's crocodiles in
Belize, and this is likely to continue in the foreseeable future, we do
not have any evidence that habitat destruction or modification is
currently or anticipated to be a threat to the Morelet's crocodile in
Belize.
Guatemala
The Morelet's crocodile was historically known from the northern
portion of Guatemala (States of Pet[eacute]n and Alta Verapaz; Schmidt
1924, pp. 79-84). According to information provided by CONABIO, the
Pet[eacute]n region of Guatemala was scarcely populated by humans
before 1960 (an estimated 15,000 to 21,000 inhabitants in approximately
12,960 square miles (33,566 km[sup2]) or about one third of Guatemala's
area) (CONABIO 2005). In 1961, the Government of Guatemala started an
official program to foster colonization in the region, and this caused
environmental alteration, as well as increased human conflicts with
crocodiles. Slightly more than 50 percent of the potential habitat for
the Morelet's crocodile has been altered in Guatemala (CONABIO 2005, p.
26). While the current amount of altered versus unaltered habitat for
the Morelet's crocodile in Guatemala is unknown, the petitioners
estimated the current amount of potentially suitable habitat to be
approximately 4,163 mi (6,700 km) of shoreline (CONABIO 2005, pp.14-
19). According to information provided by CONABIO, studies on the
status of Morelet's crocodile habitat and population in Guatemala are
underway, and the potential threats to the species are under assessment
(CONABIO 2005, p. 26).
Recent nationwide survey results are not available for Guatemala,
but populations appear to remain in their historical range in the
northern part of the country, especially the central portion of the
State of Pet[eacute]n, Laguna del Tigre National Park (northwestern
portion of the State of Pet[eacute]n) (Casta[ntilde]eda Moya et al.
2000, p.63) and the El Mirador-R[iacute]o Azul National Park
(ParksWatch, 2002, page 3). The Laguna del Tigre National Park, the
largest national park in Guatemala and the largest protected wetland in
Central America, is home to the largest numbers of Morelet's crocodiles
in Guatemala (ParksWatch 2003, p. 1).
While information regarding the distribution and abundance of
Morelet's crocodile in Guatemala is sparse, investigations conducted in
Laguna del Tigre National Park (date unspecified, reported in 1998)
estimated 4.35 individuals per km in the Sacluc River and 2.1
individuals per km in the San Pedro River, with a population structure
typical of stable populations (Casta[ntilde]eda Moya 1998a, p. 13).
Casta[ntilde]eda Moya (1997, p. 1; 1998a, p. 521) characterized
Morelet's crocodile distribution in the northern State of Pet[eacute]n,
Guatemala, as fragmented, with the healthiest populations in the
northern region of Pet[eacute]n, where human impact was lower. In a
follow-up study at Laguna del Tigre National Park Casta[ntilde]eda Moya
et al. (2000, pp. 62-63) reported a mean frequency of encounter rate
for the entire park of 4.3 individuals per km, with maximum values of
12.28 individuals per km at Flor de Luna and 11.00 individuals per km
at Laguna La Pista. The Morelet's crocodile was more frequently
encountered in closed aquatic systems than in open aquatic systems.
Juveniles were more frequently observed than were adults.
Based on extrapolations of habitat relationships in Mexico (which
resulted in an estimated 4,159.8 mi (6,694.5 km) of potential habitat
in Guatemala) and an average frequency of encounter of 2.078
individuals per km, CONABIO stated that there is an estimated total
Guatemalan population of Morelet's crocodile of about 13,911
individuals in the wild (all age classes) comprising 13 percent of the
total wild population, including about 2,643 adults (CONABIO 2005, p.
18). Although this is not a typically constructed population estimate,
this population estimate constitutes the best available scientific and
commercial data for the nationwide abundance of Morelet's crocodiles in
Guatemala.
While Guatemala has regulatory mechanisms in place to protect these
habitats, it appears that the Government of Guatemala, until recently,
was not able to enforce them adequately. Resource extraction, drug
trade, a lack of enforcement, and financial issues limited protected
areas' potential contribution to the conservation status of the
Morelet's crocodile (IARNA URL IIA 2006, pp. 88-92). For example, the
Laguna del Tigre National Park, together with the Laguna del Tigre
Protected Biotope, was considered critically threatened by drug trade,
land grabs, the presence of human settlements, expanding agriculture
and cattle
[[Page 23657]]
ranching, poaching, forest fires, the oil industry, and the almost
complete lack of institutional control over the area (ParksWatch 2003,
p. 11.) ParksWatch also deemed this national park, and its surrounding
area, would not meet its biological diversity objectives in the
immediate future unless urgent steps were taken (ParksWatch 2003, p.
11.) However, the following year ParksWatch noted major improvements at
Laguna del Tigre since their 2003 report. We have obtained information
on the specific protections recently provided to Morelet's crocodiles
in the conservation areas of Guatemala, and events that reveal a
commitment by the Guatemalan government to curtail illegal activities
harmful to Laguna del Tigre National Park. We will go into detail in
the Factor D section, Inadequacy of Existing Regulatory Mechanisms.
Casta[ntilde]eda Moya et al. (2000, p. 61), based on historical
references, cited increased destruction of habitat due to human
encroachment as having an adverse affect on the species. Based on the
research at Laguna del Tigre National Park, Casta[ntilde]eda Moya et
al. (2000, pp. 61 and 65) indicated that sibal (sawgrass) (Cladium
jamaicense) was extensively burned each year. This burning constituted
a major impact to the Morelet's crocodile habitat, as sibal habitat
offered suitable insulation, food availability, nesting cover, and
protection from predators. Furthermore, the fires facilitated the
expansion of savannahs consisting almost exclusively of jimbal (Bambusa
longifolia). Studies on the Morelet's crocodile in Pet[eacute]n suggest
fires in jimbal groves prevent Morelet's crocodiles from reproducing
since fire affects nesting sites (ParksWatch 2003, p. 13). In a more
general sense, USAID (2002, pp. 19-23) and Ruiz Ordo[ntilde]ez (2005,
pp. 2-8) indicated several conservation threats at the national level
in Guatemala, including habitat loss, habitat degradation, habitat
fragmentation, overutilization of resources, environmental
contamination, and degradation, and the introduction of exotic species.
For the past ten years, USAID and WCS having been working with
other NGOs and the Guatemalan government to combat these issues. In
their ``Maya Biosphere Landscape Conservation Area, Guatemala,
Implementation Plan FY 2008'' (WCS 2009, page 3) the WCS highlighted
their central goals for ensuring the conservation of wide-ranging
target species, including the Morelet's crocodile, was to contain the
advance of the Laguna del Tigre agro-pastoral frontier and maintain the
comparatively intact eastern bloc of the Maya Biosphere Reserve (MBR)
forest. Strategies to reduce impacts to wildlife in the MBR landscape
include involving people in local communities, forest concessions,
governments, and NGOs in local conservation efforts; developing
adaptive management strategies to address tactically threats across the
landscape; and educating local communities on best management practices
across the MBR and beyond. Since 2003, however, efforts by the Wildlife
Conservation Society (WCS) have reduced areas burned in the MBR in
Guatemala. Through educating locals on best management practices,
conducting aerial flights, utilizing remote sensing to monitor changes
in forest cover and fire, and establishing and patrolling a 47-
kilometer fire break, along with regularly reporting to the Guatemalan
and provincial governments and national media, WCS's efforts have
resulted in a 90% reduction in areas burned in the Laguna del Tigre
portion of the MBR (WCS 2009).
In addition, the president of Guatemala recently deployed 250
specially trained soldiers to recover fully all the protected zones of
El Peten in Laguna del Tigre National Park. The contingent, called the
``green battalion'' will work jointly with the Guatemalan Attorney
General's Office. This effort is aimed at combating drug trafficking
and removal or destruction of natural and archeological resources in
Laguna del Tigre, El Peten region of the MBR (Latin American Herald
Tribune, 2010).
El Mirador-R[iacute]o Azul National Park in northeastern Guatemala
is located in the department of Pet[eacute]n maintains a population of
Morelet's crocodiles (ParksWatch 2002, page 3). The park is composed of
two sections, which are divided by the Dos Lagunas Biotope. The western
section is known as El Mirador and the eastern part is known as
R[iacute]o Azul. This area is considered by World Resources Institute
to be the last pristine Guatemalan rainforest. It is also one of the
few protected areas that have experienced little deforestation over the
years. No permanent human residents live within the park borders or in
its immediate surrounding areas. El Mirador-R[iacute]o Azul National
Park is considered vulnerable, by ParksWatch, meaning that immediate
conservation measures are not needed at this time, but monitoring is
necessary to ensure the protection and maintenance of its biological
diversity in the near future (ParksWatch, 2002, page 3). NGO's such as
Asociaci[oacute]n Balam, WCS-Guatemala, the Asociati[oacute]n of Forest
Communities of Pet[eacute]n (ACOFOP), the Guatemalan National Park
Service (CONAP), the Guatemalan Archeological Institute (IDAEH), and
the office of the Executive Secretary of the President of Guatemala
formed an alliance called the ``Mesa Multisectorial para el Area
Natural y Cultural de Mirador-Rio Azule''. This alliance was formed to
develop consensus among its team members regarding the long-term
protection of the park and provide sustained economic contribution to
the people of the MBR and of Guatemala.
While CONABIO estimated that slightly more than 50 percent of the
potential habitat for the Morelet's crocodile has been altered in
Guatemala, they gave no information indicating to what extent (CONABIO
2005, p. 26). Very little information has been collected about the
consequences of forest fires, hunting, and habitat fragmentation to the
Morelet's crocodile. However, Mexico saw the presence of the Morelet's
crocodile in cultivated areas and at sites with ``intermediate''
quality habitats (CONABIO 2005, p. 13) and Belize noted relatively high
Morelet's crocodile encounter rates in wetlands surrounding sugarcane
fields, canals and ditches within the municipal limits of Belize (Platt
and Thorbjarnarson 2000b, p. 23). This information suggests that the
Morelet's crocodile does not require undisturbed habitat in order to
occupy a site. The current amount of altered versus unaltered habitat
for the Morelet's crocodile in Guatemala is unknown, but the
petitioners estimated the current amount of potentially suitable
habitat to be approximately 4,163 mi (6,700 km) of shoreline (CONABIO
2005, pp.14-19).
Other Threats to the Species' Habitat
Recreational and Educational Activities
Nonconsumptive recreational or educational uses in the form of
ecotourism are ongoing and may grow in magnitude in the future. While
CONABIO did not present precise information about the number of
companies or sites visited by tourists, an informal Internet search
suggested that large numbers of ecotourism companies and nature sites
in all three range countries were involved in this activity. At Tikal
National Park in Guatemala, for example, the number of visitors has
increased from 14,594 visitors in 1981 to 141,899 visitors in 2002
(IARNA URL IIA 2006, p. 103). Many of these visitors potentially
visited Morelet's crocodile areas in the Pet[eacute]n Region that are
in the immediate vicinity of the park as part of their ecotourism
experience.
While we cannot completely rule out the potential for adverse
effects to the Morelet's crocodile due to disturbance
[[Page 23658]]
from ecotourism activity in Tikal National Park, we have found no
evidence of such effects. Furthermore, we do not have any information
to indicate that ecotourism is likely to become a serious problem in
the future. Successful ecotourism, by its very nature, relies on the
continued conservation and protection of the natural resources it uses.
Although the number of visitors to protected areas is increasing and
the demand for ecotourism may grow in the future, the ecotourism
industry has a significant incentive to ensure that their activities do
not become a serious problem to the Morelet's crocodile and its habitat
in the future.
Mazzotti et al. (2005, p. 984), however, did identify the following
negative impacts associated with tourism development at Sian Ka'an
Biosphere Reserve (Mexico):
(1) Habitat loss;
(2) Alteration of surface and underground water flow;
(3) Ground water pollution;
(4) Extraction of resources;
(5) Erosion and sedimentation;
(6) Decrease in biodiversity; and
(7) Reduced traditional and recreational use for local communities.
Visual pollution, including trash, as well as ``jeep safaris''
(caravans of small convertible sports utility vehicles being driven
through the reserve) and boat traffic, is also increasing at Sian Ka'an
Biosphere Reserve (Mazzotti et al. 2005, p. 992). While none of these
factors was specifically linked to the Morelet's crocodile, all could
apply were the situation to deteriorate. However, we do not have any
information to indicate that the situation will deteriorate in the
future. Biosphere Reserves in Mexico are part of the United Nations
Educational, Scientific, and Cultural Organization's (UNESCO) ``Man and
the Biosphere'' program and are legally protected under Mexican federal
laws. Key features of biosphere reserves are core zones of complete
protection of key resources surrounded by mixed-use buffer zones. These
buffer zones are particularly important given the pressures on the Sian
Ka'an Biosphere Reserve from tourism, and its culturally and
archeologically significant areas (Mazzotti et al. 2005, p. 982).
Recognizing these potential negative factors, geographically dispersed
ecotourism involving limited numbers of visitors under controlled
conditions to observe and photograph specimens from canoes,
photographic blinds, or hiking trails can provide relatively benign
opportunities to local residents for economic benefits that can serve
as an alternative or disincentive to harvest the Morelet's crocodile
(CONABIO 2005, p. 28).
There is also evidence that ecotourism, as well as scientific
research and wildlife conservation, are compatible activities with
respect to the Morelet's crocodile. In Mexico, for example, ecotourists
accompany biologists associated with the Amigos de Sian Ka'an group as
they conduct surveys of the Morelet's crocodile at Sian Ka'an Biosphere
Reserve, along the eastern coast of the Yucatan Peninsula, Quintana Roo
State (EcoColors Tours 2010, pp. 1). At another site, the La Ventanilla
Eco-tourism Project in Oaxaca State, Mexico, international volunteers
assist local residents and biologists to conserve the Morelet's