United States Department of the Interior, Fred A. Seaton, Secretary 

 Fish and Wildlife Service, Arnie J. Suomela, Commissioner 



SEROLOGICAL DIFFERENTIATION OF POPJLATION OF 

 SOCKEYE SALMON, ONCORHYNCHUS NERKA 



By 



G. J- Ridgway 

 U. S. Fish and Wildlife Service 



and 

 J. E. Cushing and G. L. Durall 

 University of California, Santa Barbara 



Contribution No. 1 to research conducted with 

 the approval of the United States Section of the 

 International North Pacific Fisheries Commission. 

 The Commission, established in 1953 by the Inter- 

 national Convention for the High Seas Fisheries of 

 the North Pacific Ocean, coordinates the research 

 of the member nations, Japan, Canada, and the 

 United States. The resulting investigations provide 

 data to the Commission for use in carrying out its 

 duties in connection with fishery conservation 

 problems in the North Pacific Ocean. Publication of 

 this scientific report has been approved by the 

 United States Section of the Commission. 



Special Scientific Report --Fisheries No. 257 



Washington, D. C. 

 August 1958 



