FRENCH and BAKKALA: NEW MODEL OF OCEAN MIGRATIONS 



Maturing Age .2 (June-July) 



In June the spawning migration toward Bristol 

 Bay is northward through Alaskan Stream waters 

 and through various Aleutian Islands passes into 

 the Bering Sea. Maturing age .2 fish move 

 eastward over a broad south-north area extend- 

 ing from the Aleutian Islands to about lat. 58°N. 

 As they approach Bristol Bay the schools of fish 

 become more concentrated, and their main route 

 of migration is about 40-60 miles (74-111 km) 

 from the north side of the Alaska Peninsula. 



Third Year at Sea 



The fish that remain immature through their 

 second year at sea separate from the maturing 

 component in midwinter and move into more 

 southern waters of the North Pacific (Figure 

 25 C). Here they are joined by the new group of 

 age .1 fish; the two age groups repeat the migra- 

 tions already described and shown in Figures 

 25 D, E, and F. 



ACKNOWLEDGMENTS 



We are indebted to the Oceanographic Unit 

 (F. Favorite, Program Leader) of the Northwest 

 Fisheries Center (NWFC), National Marine 

 Fisheries Service, NOAA, for definition of oceano- 

 graphic features and stimulating discussions on 

 the oceanography of the Subarctic Pacific Region. 

 The Stock Identification and Aging Unit of the 

 NWFC (R. Major, Program Leader) provided all 

 salmon age readings from scale samples obtained 

 during the various research cruises. W. Royce, 

 L. Smith, and A. Hartt of the Fisheries Research 

 Institute, University of Washington, authors of a 

 paper on the ocean migrations of Bristol Bay 

 sockeye (Royce et al., 1968), kindly read the 

 manuscript and, although they view the migra- 

 tions somewhat differently than the present 

 authors, offered many useful suggestions that 

 were incorporated into the paper. 



LITERATURE CITED 



Bakkala, R. G. 



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Bakkala, R., and R. French. 



1971. U.S. & Japan continue cooperative research in 

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DoDiMEAD, A. J., F. Favorite, and T. Hirano. 



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Dunn, J. R. 



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French, R. 



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