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

 Fish and Wildlife Service, John L . Farley, Director 



BLUEBACK SALMON, ONCORHYNCHUS NERKA 



AGE AND LENGTH AT SEAWARD MIGRATION PAST 

 BONNEVILLE DAM 



By 



Raymond E . Anas and Joseph R. Gauley 

 Fishery Research Biologists 



Special Scientific Report--Fisheries No. 185 



Washington, D.G, 

 October 1956 



