FISHERY BULLETIN: VOL. 84. NO. 1 



ACKNOWLEDGMENTS 



I am indebted to those people who collected and 

 sampled the salmon for stomach contents that were 

 analyzed in this paper. Sharon Henderson and Bruce 

 Bernard were invaluable for their assistance in data 

 analysis and computer programming. J. G. 

 McDonald provided the initial suggestion for the 

 study. Clyde Murray and two referees offered many 

 valuable criticisms of the manuscript. Lauri Mackie 

 drafted the figures. The manuscript was prepared 

 with the help of the staff of the Publications Unit 

 of the Pacific Biological Station. 



LITERATURE CITED 



Allen, G. H., and W. Aron. 



1958. Food of the salmonid fishes of the western North Pacific 

 Ocean. U.S. Fish Wildl. Serv., Spec Sci. Rep. Fish. 237, 11 p. 

 Beacham, T. D., and C. B. Murray. 



1983. Sexual dimorphism in the adipose fin of Pacific salmon 

 (Oncorhynchus). Can. J. Fish. Aquat. Sci. 40:2019-2024. 

 Eggers, D. M. 



1982. Planktivore preference by prey size Ecology 63:381- 

 390. 

 Foerster, R. E. 



1968. The sockeye salmon, Oncorhynchus nerka. Bull. Fish. 

 Res. Board Can. 162:1-422. 

 French, R., H. Bilton, M. Osako, and A. Hartt. 



1976. Distribution and origin of sockeye salmon (Oncorhyyi- 

 chus nerka) in offshore waters of the North Pacific Ocean. 

 Int. North Pac. Fish. Comm. Bull. 34, 113 p. 

 Gibson, R. M. 



1980. Optimal prey-size selection by three-spine sticklebacks 

 (Gasterosteics aculeatus): a test of the apparent-size hypothe- 

 sis. Z. Tierpsychol. 52:291-307. 

 Godfrey, H., K. A. Henry, and S. Machidori. 



1975. Distribution and abundance of coho salmon in offshore 

 waters of the North Pacific Ocean. Int. North Pac. Fish. 

 Comm. Bull. 31, 80 p. 

 Graham, C. C, and A. W. Argue. 



1972. Basic data on Pacific salmon stomach contents and ef- 

 fort for 1967 and 1968 test trolling catches in Juan de Fuca 

 Strait, British Columbia. Can. Dep. Environ. Fish. Serv., MS 

 Rep. 1972-76, 405 p. 

 Hikita, T. 



1962. Ecological and morphological studies of the genus On- 

 corhynchus (Salmonidae) with particular consideration on 

 phytogeny. Sci. Rep. Hokkaido Salmon Hatchery 17, 60 p. 

 Hourston, A. S. 



1978. The decline and recovery of Canada's Pacific herring 

 stocks. Can. Fish. Mar. Serv. Tech. Rep. 784, 17 p. 



Hyatt, K. D. 



1979. Feeding Strategy. In W. S. Hoar and D. J. Randall 

 (editors), Fish physiology, Vol. VIII, Bioenergetics and 

 growth, p. 71-119. Acad. Press, N.Y. 



Hynes, H. B. N. 



1950. The food of freshwater sticklebacks (Gasterosteus 

 aculeatus and Pygosteus pungitius) with a review of the 

 methods used in studies of the food of fishes. J. Anim. Ecol. 

 19:36-58. 

 Ito, J. 



1964. Food and feeding habits of Pacific salmon (genus On- 



corhynchus) in their oceanic life Hokkaido Reg. Fish. Res. 



Lab. Bull. 29:85-97. (Engl, transl., Fish. Res. Board Can. 



Transl. Ser., 1309.) 

 Keast, A., and D. Webb. 



1966. Mouth and body form relative to feeding ecology in the 



fish fauna of a small lake, Lake Opinicon, Ontario. J. Fish. 



Res. Board Can. 23:1845-1874. 

 Lagler, K. F, J. E. Bardach, and R. R. Miller. 



1962. Ichthyology. John Wiley and Sons, Inc., N.Y., 545 p. 

 LeBrasseur, R. J. 



1966. Stomach contents of salmon and steelhead trout in the 

 northeastern Pacific Ocean. J. Fish. Res. Board Can. 23: 

 85-100. 



Machidori, S. 



1972. Observations on latitudinal distribution of offshore coho 

 salmon in early summer, with reference to water tempera- 

 ture and food organisms. Jpn. Far Seas Fish. Res. Lab. Bull. 

 6, p. 101-110. 



Maeda, H. 



1954. Ecological analyses of pelagic shoals— I. Analysis of 

 salmon gill-net association in the Aleutians. (1) Quantitative 

 analysis of food. Jpn. J. Ichthyol. 3:223-231. 



Major, R. L., J. Ito, S. Ito, and H. Godfrey. 



1978. Distribution and origin of chinook salmon (Oncorhyn- 

 chus tshawytscha) in offshore waters of the North Pacific 

 Ocean. Int. North Pac Fish. Comm. Bull. 38, 54 p. 



Martin, N. V, and F K. Sandercock. 



1967. Pyloric caeca and gill raker development in lake trout, 

 Salvelinus namaycush, in Algonquin park, Ontario. J. Fish. 

 Res. Board Can. 24:965-974. 



Milne, D J. 



1955. Selectivity of trolling lures. Fish. Res. Board Can. 

 Prog. Rep. Pac. Coast Stn. 103:3-5. 



Morrow, J. E. 



1980. The freshwater fishes of Alaska. Alaska Northwest 

 Publ. Co., Anchorage AK, 248 p. 

 Neave, F, T Yonemori, and R. G Bakkala. 



1976. Distribution and origin of chum salmon in offshore 

 waters of the North Pacific Ocean. Int. North Pac Fish. 

 Comm. Bull. 35, 79 p. 

 O'Brien, W. J. 



1979. The predator-prey interaction of planktivorous fish and 

 zooplankton. Am. Sci. 67:572-581. 



O'Brien, W. J., N. A. Slade, and G. L. Vinyard. 



1976. Apparent size as the determinant of prey selection by 

 bluegill sunfish (Lepomis macrochirus). Ecology 57:1304- 

 1310. 

 Parker, R. R. 



1971. Size selective predation among juvenile salmonid fishes 

 in a British Columbia inlet. J. Fish. Res. Board Can. 28: 

 1503-1510. 

 Prakash, A. 



1962. Seasonal changes in feeding of coho and chinook 

 (spring) salmon in southern British Columbia waters. J. 

 Fish. Res. Board Can. 19:851-866. 

 Reid, G M. 



1961. Stomach content analysis of troll-caught king and coho 

 salmon, Southeastern Alaska, 1957-58. U.S. Fish Wildl. 

 Serv., Spec Sci. Rep. 379, 8 p. 



Reimers, P. E. 



1964. A modified method of analyzing stomach contents with 

 notes on the food habits of coho salmon in the coastal waters 

 of Oregon and southern Washington. Fish. Comm. Oreg. 

 Res. Briefs 10, p. 46-56. 



RlCKER, W. E. 



1962. Regulation of the abundance of pink salmon populations. 



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