Table 54. 



-Length-weigh! relationships observed for Greenland turbot during the 1976 Bering Sea spring trawl 

 survey, with testing for between -area and between -sex differences. 





Otolith 



Number 



FL 

 range 



Length-weight coefficients 



Predicted 



weight-at 



-length 



Sex 



area' 



sampled 



(cm) 



a 



b 



10 cm 





30 cm 



50 cm 























Males 



B 



161 



20-76 



0.0050 



3.1351 



6.8 





213.1 



1057.1 





D 



42 



14-43 



0.0120 



2.8757 



9.0 





212.5 



— 





Both areas 





















combined 



203 



14-76 



0.0063 



3.0749 



7.4 





217.9 



1048.3 



Females 



B 



93 



19-85 



0.0031 



3.2635 



5.7 





207.1 



1097.0 





D 



62 



14-52 



0.0125 



2.8844 



9.5 





227.3 



992.1 





Both areas 





















combined 



155 



14-85 



0.0066 



3.0717 



7.7 





225.9 



1085.0 



Overall 





358 



14-85 



0.0064 



3.0721 



7.5 





221.4 



1063.6 



Analysis of 



covariance 









Tests for 



differences-" 













Slope (ft) 







Common means 





df 





F ratio 



df 







1 rain 



Males between areas B and D 



1:199 





34.8" 



— 







— 



Females bet 



ween areas B and D 



1:151 





35.1** 



— 







— 



Between sexes in area B 





1:250 





8.79** 



— 







— 



Between sexes in area D 





1:100 





0.03 



1:101 







11.5** 



'See Figure 4. 

 ••** = P £0.01. 



Table 55. 



-Parameters of the von Berlalanffy growth curves for Greenland turbot, 1976 Bering Sea spring trawl 



survey. 1 









Number 



Age 



FL 



Standard 











Otolith 

 area** 



Data set 



of age 

 readings 



range 



(yr) 



range 

 (cm) 



error of 



curve fit 





Parameters 





Sex 



^oo 



A* 



A> 



Male 



B 



All ages 



193 



2-11 



21-78 



4.67 



75.13 



0.27 



0.73 







Selected ages 





0, 2-9 



21-78 



5.11 



92.47 



0.14 - 



-0.07 



Female 



B D 



All ages 



182 



2-16 



21-85 



2.48 



86.53 



0.19 



0.39 







Selected ages 





0, 2-13 



21-84 



3.13 



96.82 



0.13 



0.03 



For Greenland turbot, each mean length-at-age in the selected ages data sets was based upon only six or 

 mote length-age determinations. 

 -See Figure 4. 



131 (30. l°7o) of the 435 grid sampling stations, at a mean abun- 

 dance (mean CPUE) of 2.12 kg/km trawled (Table 56). Regions 

 of highest abundance (by weight) were subareas 2 Slope and 3 

 Slope (bottom depths 183-457 m), where mean densities were 

 38.98 and 7.03 kg/km, respectively. The maximum observed 



catch rate was 425.0 kg/km. No arrowtooth flounder was taken 

 in inner shelf subareas 1, 4S, and 4N. 



The total apparent population biomass within the study area 

 was 40,800 t (95°7o confidence limits 30,000-51,700 t), a factor of 

 1.45 times larger than the 1975 survey estimate of 28,000 t 



Table 56. — Kstimated biomass and population numbers of arrowtooth flounder by subarea and for all subareas combined, 



1976 Bering Sea spring trawl survey. 











Proportion 





Proportion 









Percentage 

 frequency of 



Mean 

 CPUE 



Estimated 

 biomass 



of total 

 estimated 



Esiimated 

 population 



of total 

 estimated 



Mean 



size 





Weight 



FL 



Subarea 



occurrence 



(kg kmi 



(t) 



biomass 



(millions) 



population 



(kg) 



(cm) 



Inner shelf 



4N 



4S 



1 

 Outer shelf 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



- 



and slope 



















3 



14.5 



0.65 



3,063 



0.075 



10.5 



0.070 



0.291 



— 



3 Slope 



100.0 



7.03 



1,361 



0.033 



15.6 



0.038 



0.243 



27.2 



2 



71.9 



5.29 



19,747 



0.484 



105.3 



0.706 



0.188 



25.8 



2 Slope 



97.5 



38.98 



16.651 



0.408 



27.8 



0.186 



0.599 



36.0 



All subareas 



















combined 



30.1 



2.12 



+ •:: 





149.2 





0.274 



27.9 



See Figure 3. 

 -95 "o confidence limits: 29,990-51.654 t. 



94 



