Current through August 30, 2024
(a) In the
Bering Sea District, the department shall establish a
separate C. bairdi Tanner crab total allowable catch level for
that portion of the Bering Sea District that is east of 166° W. long., and
for that portion that is west of 166° W. long., as described in (b) and (c)
of this section. The maximum exploitation on mature male biomass (EXPmmb) in
both areas will be established by an analysis of preseason survey mature female
biomass (MFB) data as follows:
(1) if
MFB is less than 25 percent of MFB(i982-20i8), EXPmmb will be 0.05;
(2) if MFB is at least 25 percent but not
greater than 100 percent of MFB(i982-20i8), EXPmmb will be computed as
(((MFB/MFB(i982-20i8) -
0.25)/0.75)x0.15)+0.05, with slope
m and intercept
b;(A) the EXPmmb slope "w"
is computed as (((((MFB/MFB(i982-2oi8) -0.25)/0.75)x0.15)+0.05) -
0.05)/0.75;
(B) the EXPmmb
intercept "b" is computed as 0.05 - (m *
0.25);
(3) if
MFB is greater than 100 percent of MFB( 1982-2018),
EXPmmb will be 0.20.
(b)
In that portion of the Bering Sea District that is east of 166° W. long.,
and under the restrictions of (d) of this section, the total allowable catch
level shall be established as follows:
(1) if
Be is less than 25 percent of Be,(1982-2018), the fishery will not
open;
(2) if Be is at least 25
percent but not greater than 100 percent of Be,(1982-202I), the total allowable
catch will be ((m x Be/Be,(1982-2018)) + b) x
Be or 50 percent of ELMe, whichever is less;
(3) if Be is greater than 100 percent of Be,(
1982-2018), the total allowable catch will be computed as EXPmmb
x Be or 50 percent of ELMe, whichever
is less.
(c) In that
portion of the Bering Sea District that is west of 166° W. long., and under
the restrictions of (d) of this section, the total allowable catch level shall
be established as follows:
(1) if Bw is less
than 25 percent of Bw,( 1982-2018), the fishery will not open;
(2) if Bw is at least 25 percent but not
greater than 100 percent of Bw,(i982-202i), the total allowable catch will be
computed as ((m x Bw/Bw,(i982-2oi8)) + b) x
Bw or 50 percent of ELMw, whichever is less;
(3) if Bw is greater than 100 percent of Bw,(
1982-2018), the total allowable catch will be computed as EXPmmb
x Bw or 50 percent of ELMw, whichever
is less.
(d)
Notwithstanding (a) - (c) of this section, in implementing this harvest
strategy, the department shall consider the reliability of the estimates of
C. bairdi Tanner crab, the manageability of the fishery, and
other factors the department determines necessary to be consistent with
sustained yield principles, and use the best scientific information available
and consider all sources of uncertainty as necessary to avoid
overfishing.
(e) In this section,
(1) "EXPmmb" means the maximum exploitation
rate on mature male C.bairdi Tanner crab biomass as determined
in (a) of this section;
(2) "MFB"
means the biomass of mature female C.bairdi Tanner crab in the
entire surveyed portion of the Bering Sea estimated for the time of the
preseason survey;
(3)
"MFB(1982-2018)" means the mean value of the biomass of mature female
C.bairdi Tanner crab in the entire surveyed portion of the
Bering Sea estimated at the time of the preseason survey for the period
1982-2018;
(4) "Be" means the
biomass of male C.bairdi Tanner crab in the portion of the
Bering Sea District that is east of 166° W. long, that are more than 112 mm
carapace width estimated at the time of the preseason survey;
(5) "Be,(1982-2018)" means the mean value of
the biomass of male C. bairdi Tanner crab in the portion of
the Bering Sea District that is east of 166° W. long, that are more than
112 mm carapace width estimated at the time of the preseason survey for the
period 1982-2018;
(6) "ELMe" means
100 percent of the new-shell male C. bairdi Tanner crab in the
portion of the Bering Sea District that is east of 166° W. long, that are
at least 127 mm (five inches) carapace width, including lateral spines, plus a
percentage of old-shell male C. bairdi Tanner crab that are at
least 127 mm carapace width estimated at the time of the preseason survey; the
percentage of old-shell male C. bairdi Tanner crab will be
based on the expected fishery selectivity for old-shell versus new-shell male
C. bairdi Tanner crab;
(7) "Bw" means the biomass of male C
bairdi Tanner crab in the portion of the Bering Sea District that is
west of 166° W. long, that are more than 102 mm carapace width estimated at
the time of the preseason survey;
(8) "Bw,(i982-20i8)"
means the mean value of the biomass of male C. bairdi Tanner
crab in the portion of the Bering Sea District that is west of 166° W.
long, that are more than 102 mm carapace width estimated for the time of the
preseason survey for the period 1982-2018;
(9) "ELMw" means 100 percent of the new-shell
male C. bairdi Tanner crab in the portion of the Bering Sea
District that is west of 166° W. long, that are at least 127 mm (five
inches) or greater carapace width, including lateral spines, plus a percentage
of old-shell male C. bairdi Tanner crab that are at least 127
mm CW estimated at the time of the preseason survey; the percentage of
old-shell male C. bairdi Tanner crab will be based on the
expected fishery selectivity for old-shell versus new-shell male C.
bairdi Tanner crab.
Authority:AS
16.05.251
