MALE 



FEMALE 



SEXES COMBINED 



3S 



Outer shelf 



20 + 



♦* 15 

 glD 



0) q 







20 + 

 15 



Mean length=24.0 

 n=2790 



ao „ 



15 

 10 

 5 



Mean length=24.4 

 n=4581 



10 80 30 « S 60 70 S) 30 1(0 0102030 



20 



20 

 IS 

 10 

 5 

 . 



Mean length=24.3 

 n=7371 



c 



01 



Jf 10 

 0) 



Q- 5 ,, 



Mean length=22.9 

 n=2115 



15 

 10 



5 ., 



40 50 60 70 BO 90 100 10 20 30 40 50 60 70 BO 90 100 

 20 i 



Mean length=23.0 

 n=2900 



15 .. 

 10 .. 

 5 .. 



Mean length=22.9 

 n=5085 



J M 1— I |* i | , , | | , V | / , |^ , , | | | , | U | | ' , | ^ 



10 20 30 40 50 60 70 80 90 100 10 2030405060 70 8090100 10 2030*5060 70 8033 100 



Inner shelf 



4N 



4S 



20 t 

 15 .. 

 10 



5 . 





 EB 

 15 

 10 



5 







20 t 

 15 .. 

 10 .. 



5 







Mean length=18.7 

 n=1092 



0102030405060 70 8030 100 



Mean length=20.3 

 n=3346 



Mean length=22.7 

 n=8359 



Mean length = 19.5 

 n=1794 



Mean length=19.l 

 n=2886 



0102030405060 70 8090 100 10 20304050ED70B030100 



20 



Mean length=22.0 

 n=4625 



0102030405060 70 S090 100 10 20 30 40 50 60 70 BO 90 100 10 20 30 40 SO 60 70 BO 90 100 



Mean length=22.8 

 n=7672 



-.: 

 10 . 



5 . 







20 t 

 15 .. 

 10 



5 







Mean length=21.3 

 n=7971 



Mean length=22.8 

 n=16.031 



| ■ S ■ \ , , | 1 ! T U i T ^ I ^ - - , ■ , | | U | | y ^-,1 1 111, 



10 2030-105060 70 8030100 10 2030405060 70 8090 100 0102030405060 70 9090 100 



Overall 



20 . 



~ 15 \ 



§ 10 



Q> q 



a. - 



Mean length=22.4 

 n= 17,706 



20 , 



IS 



10 



5 . 



Mean length=22.7 

 n=21,576 



20 + 

 15 

 10 

 5 



Mean length=22.6 

 n=39.352 



10 2030405060 70 8090100 01020X405060 70 8090 100 10 2030405060 70B030 100 



Total length (cm) Total length (cm) Total length(cm) 



Figure 38.— Size composition of yeUowfin sol* taken during the 1976 Bering Sea spring trawl survey, by sex and geographical area (see Fig. 3). The category sexes 



combined includes male, female, and undetermined. 



cm (9-44 cm); subarea 1, 22.8 cm (5-39 cm); subarea 3N, 25.9 cm 

 (23-35 cm); subarea 3S, 24.3 cm (15-41 cm); and subarea 2, 22.9 

 cm (10-39 cm). 



Sampling stations with particularly high proportions ( > 50% of 

 all yeUowfin sole taken) of small-sized (< 20 cm) individuals were 

 located in inner Bristol Bay during May and along the northern 

 boundaries of subareas 4S and 4N during June. These latter sta- 

 tions showed relatively high proportions of individuals sized 16-18 

 cm. 



Age composition. — Totals of 507 male and 600 female sac- 



cular otoliths were collected from yeUowfin sole in the size range 

 13-36 cm. The observed ranges in ages were males, 3-16 yr, and 

 females, 3-21 yr. 



Although the overaU estimates of yeUowfin sole total popula- 

 tion abundance were apparently badly biased by the effects of 

 migration, the overaU estimated numbers of individuals at each 

 length were used as the best estimators of relative age-frequency 

 distribution. This analytical approach assumed that even if sam- 

 pling problems caused overestimation of total population abun- 

 dance, the effects may have been fairly uniformly distributed 

 among aU size and age groups. The vaUdity of this assumption can 



54 



