slope subarea included rattails (Macrouridae); Pacific ocean 

 perch; sablefish; bigmouth sculpin, Hemitripterus bolini; 

 spinyhead sculpin, Dasycottus setiger; and rex sole, Glyp- 

 tocephalus zachirus. 



Species Associations 



Procedures. — Recurrent group analysis (Fager 1957, 1963; 

 Fager and Longhurst 1968) was used as a method for summariz- 



Table 13. — The 20 most common fish taxa recorded during the spring 1976 Be- 

 ring Sea demersal trawl survey, in order of percentage frequency' of occurence. 



Rank 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 



All areas 



Subarea' 



Taxon 



Walleye pollock 

 Yellowfin sole 

 Pacific cod 

 Alaska plaice 

 Greenland turbot 

 Unidentified sculpins 

 Rock sole 

 Flathead sole 

 Sturgeon poacher 

 Pacific herring 

 Pacific halibut 

 Capelin 



Unidentified snailfish 

 Arrowtooth flounder 

 Unidentified eelpouts 

 Myoxocephalus spp. 

 Unidentified skates 

 Longhead dab 

 Starry flounder 

 Great sculpin 



nbined 



1 



2 



3 



4 



Slope 



77.0 



49 



92 



SKI 



73 



82 



71.3 



100 



53 



73 



99 



2 



63.2 



41 



84 



61 



64 



75 



60.0 



80 



49 



50 



100 







58.6 



18 



74 



86 



32 



88 



54.5 



59 



54 



62 



37 



55 



54.0 



49 



88 



68 



19 



27 



50.6 



25 



75 



68 



19 



65 



44.8 



60 



39 



30 



78 



8 



41.4 



39 



29 



50 



73 







37.0 



23 



75 



16 



9 



88 



35.4 



54 



10 



21 



85 







30.8 



10 



25 



55 



21 



43 



30.1 







72 



15 







98 



28.5 



3 



40 



55 



12 



24 



28.0 



32 



36 



15 



46 



10 



27.8 







42 



38 



4 



71 



27.1 



72 



4 







54 







22.3 



55 



24 



3 



23 







13.3 



8 







13 



45 







Number of trawls 



435 



100 



89 117 



'See Figure 3. 



78 



Table 15. — The 20 most abundant fish taxa recorded during the spring 1976 

 Bering Sea demersal trawl survey, in order of observed abundance, subarea 1.' 



Rank 



Taxon 



CPUE 

 (kg/km) 1 



Proportion of 

 total CPUE ! 



Cumulative 

 proportion 



1 



Yellowfin sole 



(258.98) 



2 



Unidentified sculpins 



21.08 



3 



Alaska plaice 



(10.71) 



4 



Rock sole 



6.86 



5 



Longhead dab 



4.93 



6 



Myoxocephalus spp. 



4.40 



7 



Sturgeon poacher 



3.34 



8 



Walleye pollock 



2.77 



9 



Unidentified poachers 



2.14 



10 



Pacific herring 



2.01 



11 



Capelin 



1.65 



12 



Great sculpin 



1.51 



13 



Starry flounder 



1.20 



14 



Gymnocanthus spp. 



0.40 



15 



Greenland turbot 



0.37 



16 



Flathead sole 



0.36 



17 



Pacific halibut 



0.28 



18 



Unidentified Osmeridae 



0.25 



19 



Pacific cod 



0.20 



20 



Unidentified snailfish 



0.10 



0.627 

 0.051 

 0.026 

 0.017 

 0.012 

 0.011 

 0.008 

 0.007 

 0.005 

 0.005 

 0.004 

 0.004 

 0.003 

 0.001 

 0.001 

 0.001 

 0.001 

 0.001 

 0.001 

 0.001 



0.627 

 0.678 

 0.704 

 0.721 

 0.733 

 0.744 

 0.752 

 0.759 

 0.764 

 0.769 

 0.773 

 0.777 

 0.780 

 0.781 

 0.782 

 0.783 

 0.784 

 0.785 

 0.786 

 0.787 



'See Figure 3. 



^Overall catch per unit effort, kg/km trawled. Total effort = 271.8 km. 

 Parentheses indicate estimates of questionable accuracy due to potential sampling 

 problems. 



'Proportion of total catch per unit effort, all fish and invertebrates combined. 

 Total CPUE =413.21 kg/km. 



Table 14. — The 20 most abundant fish taxa recorded during the spring 1976 

 Bering Sea demersal trawl survey, in order of observed abundance, for all 

 subareas combined. 1 



Table 16. — The 20 most abundant fish taxa recorded during the spring 1976 

 Bering Sea demersal trawl survey, in order of observed abundance, subarea 2.' 







CPUE 



Proportion of 



Cumulative 







CPUE 



Proportion of 



Cumulative 



Rank 



Taxon 



(kg/km) ; 



total CPUE 1 



proportion 



Rank 



Taxon 



(kg/km) 1 



total CPUE> 



proportion 



1 



Yellowfin sole 



(104.04) 



0.363 



0.363 



1 



Yellowfin sole 



(127.04) 



0.284 



0.284 



2 



Walleye pollock 



(34.00) 



0.119 



0.482 



2 



Walleye pollock 



(119.24) 



0.266 



0.550 



3 



Unidentified sculpins 



12.77 



0.045 



0.527 



3 



Rock sole 



29.67 



0.066 



0.616 



4 



Alaska plaice 



(12.19) 



0.043 



0.570 



4 



Flathead sole 



22.34 



0.050 



0.666 



5 



Rock sole 



11.81 



0.041 



0.611 



5 



Pacific cod 



17.21 



0.038 



0.704 



6 



Pacific cod 



5.12 



0.018 



0.629 



6 



Unidentified sculpins 



12.02 



0.027 



0.731 



7 



Flathead sole 



4.95 



0.017 



0.646 



7 



Alaska plaice 



(10.02) 



0.022 



0.753 



8 



Myoxocephalus spp. 



3.51 



0.012 



0.658 



8 



Myoxocephalus spp. 



8.62 



0.019 



0.772 



9 



Greenland turbot 



2.56 



0.009 



0.667 



9 



Pacific halibut 



5.79 



0.013 



0.785 



10 



Sturgeon poacher 



2.33 



0.008 



0.675 



10 



Arrowtooth flounder 



5.29 



0.012 



0.797 



11 



Arrowtooth flounder 



2.12 



0.007 



0.682 



11 



Greenland turbot 



4.10 



0.009 



0.806 



12 



Pacific herring 



1.75 



0.0O6 



0.688 



12 



Unidentified eelpouts 



2.65 



0.006 



0.812 



13 



Longhead dab 



1.62 



0.006 



0.694 



13 



Sturgeon poacher 



2.48 



0.006 



0.818 



14 



Pacific halibut 



1.57 



0.005 



0.699 



14 



Unidentified skates 



1.54 



0.003 



0.821 



15 



Unidentified eelpouts 



1.31 



0.005 



0.704 



15 



Yellow Irish lord 



1.25 



0.003 



0.824 



16 



Great sculpin 



1.27 



0.004 



0.708 



16 



Big skate 



0.84 



0.002 



0.826 



17 



Unidentified skates 



1.00 



0.004 



0.712 



17 



Searcher 



0.74 



0.002 



0.828 



18 



Capelin 



0.85 



0.003 



0.715 



18 



Starry flounder 



0.72 



0.002 



0.830 



19 



Unidentified poachers 



0.66 



0.002 



0.717 



19 



Shortfin eelpout 



0.43 



0.001 



0.831 



20 



Starry flounder 



0.46 



0.002 



0.719 



20 



Saffron cod 



0.25 



0.001 



0.832 



■See Figure 3. 



! Overall catch per unit effort, kg/km trawled. Total effort = 1,279.8 km. 

 Parentheses indicate estimates of questionable accuracy due to potential sampling 

 problems. 



Troportion of total catch per unit effort, all fish and invertebrates combined. 

 Total CPUE = 286.6 kg/km. 



'See Figure 3. 



! Overall catch per unit effort, kg/km trawled. Total effort = 283.5 km. 

 Parentheses indicate estimates of questionable accuracy due to potential sampling 

 problems. 



'Proportion of total catch per unit effort, all fish and invertebrates combined. 

 Total CPUE = 447.94 kg/km. 



31 



