55 ,, N. 



I75°E. 



180° 



I75°W 



I70°W 



I65°W. 



I60°W 



50° 



4 5° 



40° 



XTJL ° 



|0 — 'ALASKAN 



STREAM 



AREA 



o 



TRANSITION 

 AREA 



O 



XX 

 XX 



Catch per 100 tans 



Immature Maturing 



x No catch x 



o I -20 • 



O 21-40 • 



O 41-60 • 



O 61-80 



JO 



81 -100 



55°N. 



50° 



45° 



40° 



Figure 8. — Relative abundance of immature and maturing sockeye salmon as shown by gill net catches of 

 Japanese and United States research vessels in May 1968. 



55° N. 



165° 



160° 



165° 



160° 



I65 c 



160° 



50 c 



4 5' 



55°N. 



50° 



45° 



Figure 9. — Relative abundance of sockeye, chum, and pink salmon near long. 165° W. as shown by catches of 



the George B. Kelez in early June 1968. 



