FRENCH and BAKKALA: NEW MODEL OF OCEAN MIGRATIONS 



Figure 20. — Distribution of maturing age .2 sockeye salmon in winter (data from 1962-70 with 



the exception of 1964, 1966, and 1968). 



Figure 21. — Fishing stations and relative abundance of immature sockeye salmon during summer 

 1969 near Adak Island (shown above station line) and maturing sockeye salmon in spring 1970 

 (shown below stations). 



recoveries of tagged salmon by the mother- 

 ship fishery (which were made only west of long. 

 ITS'^W) show a marked decline in recoveries for 

 tagging locations east of long. 175°W. For tagging 

 locations east of long. 170°W, recoveries were 

 almost all from Bristol Bay and only a very 

 few recoveries were made in the mothership 



fishery. Thus, primary routes to Bristol Bay for 

 the salmon located east of long. 170^W must have 

 been through Aleutian Islands passes east of long. 

 175°W (primarily Amukta Pass). 



Routes of maturing sockeye salmon moving 

 eastward in the Bering Sea may be variable 

 and over a broad front. Largest catches by the 



607 



