Table 57. — Estimated population size of arrowtooth flounder age groups and year classes within survey subareas of the 

 eastern Bering Sea, 1976 spring trawl survey.' 



<3 4 5 6 7 8 9 10 11 2 12 Age un- All ages 



Subarea' — 1972 1971 1970 1969 1968 1967 1966 1965 — known combined 



millions of fish 



Outer shelf 

 and slope 



3 Slope 2.06 2.69 0.48 0.27 0.09 0.01 — — — — 5.60 



2 43.23 52.17 6.87 2.94 0.04 0.01 — — — — — 105.26 



2 Slope 2.70 12.32 4.34 4.27 2.54 1.07 0.43 0.07 — 0.04 0.02 27.80 



All subareas 



combined 47.99 67.18 11.69 7.48 2.67 1.09 0.43 0.07 — 0.04 0.02 138.66 

 Proportion 



of total 0.346 0.484 0.084 0.054 0.019 0.008 0.003 0.001 — < 0.001 <0.001 



'The population in subarea 3 is not included because no length-frequency data were collected. 

 'See Figure 3. 



MALE 



FEMALE 



SEXES COMBINED 



slope 



2 



slope 



Outer shelf and slope 



a + 



is 



ID 



5 .. 





 20 

 IS . 

 10 



5 





 20 

 IS 

 ID 



Mean length=27.2 

 n=97 



01D20304050G0 70B090 100 10 20 30 40 50 60 70 B0 30 100 10 20 30 40 50 GO 70 90 90 100 



<0 



a. 



so 

 is 



Mean length=31.4 10 

 n=709 5 



E0 .. 



IS 



Mean length=38.1 10 



n=1284 



5 ,, 



Mean length=36.0 

 n=1993 



10 20 30 



50 60 70 B0 30 1D0 10 2030405D60 70B0301O0 10 20 30 40 50 60 70 80 90 100 



Overall 



t 



S 15 



n 



a> 



\ 



O 10 



\ 



a. 5 



1 





/ \ 



Mean length=26.3 

 n=1707 



20 

 15 

 10 .. 



Mean length=29.2 

 n=2396 



20 .. 



IS 



10 



s ., 



Mean length=27.9 

 n=4103 



U" 20 30 « SO SC 70 80 f. Iff: 10 20 30 40 50 K> 70 90 30 100 10 20 30 40 SO 



70 B0 SO 100 



Fork length (cm) 



Fork length (cm) 



Fork length (cm) 



Figure 70. — Size composition of arrowtooth flounder 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. 



99 



