POLLOCK 



AUG-OCT 1975 



CATCH IN kg/ km 



+ 



NO CATCH 



<50 

 50-250 

 250-500 



>500 





III 





■ 



54-Nl 



180* 



i s^eSa 



_J I L_ 



178 D W I76"W 174"W 172°W 170°W I68°W I66°W 164°W 162°W 160°W 158"W 



B 



POLLOCK 



APRIL- JUNE 1976 



CATCH IN kg/km 



+ 



NO CATCH 

 <50 

 50 r 250 

 250 - 500 

 >500 





11 





180° 178°W I76°W l74°W 172*W I70°W I68°W I66°W 164°W I62"W 160°W 158"W 



Figure 82. — Comparison between the apparent distributions and relative abundance of walleye pollock in the Bering Sea: A) 1975 

 survey; B> 1976 survey. The survey area boundary lines used in 1975 are superimposed upon both illustrations as a common 

 reference. 



115 



