The estimated size of each age group population is summarized 

 in Figure 66 and Table 52. Overall, 1 yr olds — primarily dis- 

 tributed in subareas 4S, 3N, 3S, and 4N — accounted for 45.5% 

 of the total apparent population; 97.4% of the overall population 

 was aged 3 yr or less. In general, populations in subareas 1, 2, 

 3N, 3S, and 3 Slope were composed of individuals aged 1 -4 yr. In 

 deepwater area 2 Slope, age groups 3-16 yr were relatively abun- 

 dant, and 53.9% of all individuals (sexes combined) were 6 yr of 

 age or older. 



Sex ratio. — The overall proportion of Greenland turbot 

 females was 0.41 (Table 53). Males were more abundant than 

 females in subareas 1 and 2. In deep water (subareas 2 Slope and 3 

 Slope), females were more abundant. Males appeared to dom- 

 inate age groups 1, 2, and 3 yr, and females, ages 4 and 5 yr. 



Length-weight relationship. — A total of 358 individuals from 

 the Greenland turbot populations in otolith areas B and D were 

 measured for fork length and weight (Table 54, Fig. 67). The 

 overall observed relationship was W = 0.0064 Z.'- ' 21 . Statistically 

 significant differences were observed in all comparisons between 

 populations. At > 30-40 cm FL, both males and females were up 

 to 10-12% heavier at length in otolith area B than in otolith area 

 D. In otolith area D, females were 6-8% heavier at length than 



males, at all sizes. In otolith area B, females were heavier at length 

 than males, but only at > 40 cm FL. 



Age-length relationship and growth. — Because only 206 age 

 determinations were obtained from otolith area B and 169 from 

 otolith area D, data from the two areas were combined to create 

 more complete age-frequency tables. Results of the growth curve 

 fittings, summarized in Table 55 and Figure 68, were uncertain 

 due to limitations of both male and female age-frequency tables. 

 In the age-frequency table for males, the only age groups with 10 

 or more age-length observations were 2, 3, 4, 7, and 8 yr. Among 

 females only age groups 2, 3, and 4 yr were well sampled. 



Although the choice of best fit was unclear, results from the 

 two data sets indicated that females had an approximately 5-15% 

 larger asymptotic fork length and slightly slower growth comple- 

 tion rate (see Equation (24)) than males. 



Arrowtooth flounder. 



Distribution and abundance. — Arrowtooth flounder showed 

 an exclusively deepwater distribution pattern, occurring from 

 southern to northern limits of the survey area at bottom depths 

 > 75-1 10 m (Fig. 69). Overall, arrowtooth flounder were taken at 



Table 52. — Estimated population size of Greenland turbot age groups and year classes within survey subareas of the eastern Bering Sea, 1976 spring trawl survey. 



Subarea 1 



1 

 1975 



1974 



3 

 1973 



4 

 1972 



1971 



6 

 1970 



7 

 1969 



1968 



9 

 1967 



10 

 1966 



11 

 1965 



a 12 



Age All ages 



unknown combined 



Inner shelf 















- millions 



Df fish 















4N 



36.55 



0.02 



— 



— 



— 



— 



— 



— 



— 



— 



— 



— 



— 



36.57 



4S 



61.06 



0.40 



0.19 



0.05 



— 



— 



— 



— 



— 



— 



— 



— 



— 



61.70 



1 



0.63 



3.14 



3.78 



0.20 



— 



— 



— 



— 



— 



— 



— 



— 



— 



7.75 



Outer shelf 































and slope 































3 



56.74 



76.49 



39.49 



1.98 



0.15 



— 



— 



— 



— 



— 



— 



— 



0.10 



174.95 



3 Slope 



— 



0.14 



1.37 



0.33 



0.04 



— 



— 



0.01 



0.01 



— 



0.02 



0.01 



— 



1.93 



2 



4.76 



29.06 



27.41 



2.76 



0.22 



0.O2 



0.03 



0.03 



— 



0.02 



0.03 



— 



0.04 



64.38 



2 Slope 



- 



0.01 



0.63 



0.73 



0.17 



0.13 



0.23 



0.19 



0.24 



0.12 



0.30 



0.72 



0.11 



3.58 



All subareas 































combined 



159.74 



109.26 



72.87 



6.05 



0.58 



0.15 



0.26 



0.23 



0.25 



0.14 



0.35 



0.73 



0.25 



350.86 



Proportion 































of total 



0.455 



0.311 



0.208 



0.017 



0.002 



. 0.001 



< 0.001 



< 0.001 



< 0.001 



< 0.001 



0.001 



0.002 



< 0.001 





'See Figure 3 































Table 53. — Proportions of females in the estimated population of Greenland turbot by age group and geographical area, 1976 



Bering Sea spring trawl survey. 1 















Age group (yr) 













All ages 



Subarea 2 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



combined 



























Inner shelf 

 1 



0.51 



0.24 



0.29 



0.80 



















0.30 



Outer shelf 





























and slope 





























3 



0.51 



0.55 



0.43 



0.40 



0.38 

















0.50 



3 Slope 



— 



1.00 



0.61 



0.83 



1.00 



— 



— 



0.00 



— 



— 



1.00 



1.00 



0.64 



2 



0.26 



0.30 



0.42 



0.88 



0.95 



0.00 



0.00 



— 



— 



— 



1.00 



— 



0.38 



2 Slope 



— 



1.00 



0.49 



0.62 



0.76 



0.19 



0.12 



0.00 



0.42 



0.54 



1.00 



1.00 



0.64 



All subareas 





























combined 



0.41 



0.36 



0.42 



0.76 



0.86 



0.15 



0.08 



0.00 



0.42 



0.54 



1.00 



1.00 



0.41 



Based upon sampled individuals for which sexes could be determined. 

 2 See Figure 3. 



93 



