100 



^20 40 102 100 24 7 4 3 



LENGTH (INCHES) 



HERRING 

 OTHER FOOD 



+SAMPLE SIZE 



100 



^4 12 28 40 72 92 34 34 14 5 



0-f 



20 25 30 35 40 45 



LENGTH (INCHES) 



Figure 5.- -Percentage frequency of occurrence in relation 

 to length of saInK)n (by 2.5-inch intervals) of food items 

 taken from stomachs of troll-caught salmon. South- 

 eastern Alaska, 1957-58. 



SUMMARY 



Stomach samples from king and 

 coho salmon were collected from the 

 commercial troll fishery in South- 



eastern Alaska during the fishing sea- 

 sons of 1957 and 1958. Data gathered 

 from examination of the stomach con- 

 tents are summarized in four ways: 

 (1) percentage of volume of individual 

 food organisms in all stomachs ex- 

 amined, (2) percentage of occurrence 

 of each food organism in stomachs 

 examined, (3) percentage of occur- 

 rence of food organisms by species of 

 salmon, and (4) frequency of occur- 

 rence of food organisms as related to 

 the length of king and coho salmon. 



Results indicate that herring were 

 used as food by king salmon more fre- 

 quently in 1958 than in 1957, but use of 

 this item by coho salnnonwas about equal 

 for the 2 years. King salmon appear to 

 utilize a greater percentage of herring 

 (59.5 percent) than do coho salmon (22.2 

 percent). Large king salmon consunae 

 more herring than small king salmon, 

 but such a relation is not established 

 for coho salmon. 



LITERATURE CITED 



CHAPMAN, W. M. 



1936. The pilchard fishery of the 

 State of Washington in 1936 with 

 notes on the food of the silver 

 and Chinook salmon off the Wash- 

 ington Coast. State of Washing- 

 ton, Department of Fisheries, 

 Bulletin 36 C, p. 1-20. 



FISHERIES RESEARCH BOARD OF 

 CANADA. 

 1954. Report of the Pacific Biologi- 

 cal Station. In: Fisheries Re- 

 search Board of Canada Annual 

 Report, p. 75-105. 



HEG, ROBERT, AND JACK VAN 

 HYNING. 

 1951. Food of Chinook and silver 

 salmon taken off the Oregon 

 Coast. Fish Commission of 

 Oregon, Research Briefs, vol. 

 3, no. 2, p. 33-40. 



PRITCHARD, A. L., and ALBERT L. 

 TESTER. 

 1944. Food of spring and coho salm- 

 on in British Columbia. Fish- 

 eries Research Board of Canada, 

 Bulletin 65, 23 p. 



SENTER, VANCE E. 



1940. Observations on the food of 

 Pacific salmon. Pacific Fisher- 

 man, vol. 38, no. 4, 26 p. 



MS #1019 



GPO 91 1382 



