TABLES 

 N08 . Page 



1. Location, date of catch, number, sex, and length of 



sedmon from the Japanese high seas fishery in 1955 • • • 2 



2. Nvnsber of salmon stomachs studied 3 



3. Volumes of stomachs having identifiable remains 3 



k. Food items in the stomach contents of sockeye salmon .... k 



5. Food items in the stcmach contents of chum salmon k 



6. Food items in the stomach contents of pink salmon k 



7. Percentage contribution by volume of fish, squid, and 



euphausiids to the diet of the sockeye, pink anA 



chian salmon 10 



The research reported herein was carried out as part of the 

 participation of the United States in the investigationeil program of 

 the International North Pacific Fisheries Ccamnission. The University 

 of Washington carried out the work under U. S. Fish and Wildlife Ser- 

 vice Contract No. 14-19-008- 9303 and Office of Naval Research Con- 

 tract Nos. Nonr-477(10), Project 083-OI2 and Nonr-it-77(01) , Project 

 083-072. 



Abstract 



The stomach contents of salmon caught in the Japanese oceanic 

 gill -net fishery were studied. Data are presented on the diets of 

 three species of salmon: Oncorhynchvis nerka (sockeye), 0. keta (chxom), 

 and 0. gorbuscha (pink). The 20 fishing areas were grouped into three 

 major regions, and data for each species of salmon were treated sepa- 

 rately according to region of capture. The contents of individual 

 stcanachs were examined and classified. There was little variation 

 between the stomach contents of the same species caught in the same 

 area, but there were marked differences between species. No relation- 

 ship has been established between plankton samples and the animal 

 forms found in the stomach contents. Use of the Isaacs-Kidd midwater 

 trawl may prove satisfactory for sampling the food of salmon in future 

 investigations . 



