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Nutrition of Salmonoid Fishes: Arginine and Histidine Requirements of Chinook and Coho Salmon¹

Western Fish Nutrition Laboratory, Bureau of Sport Fisheries and Wildlife, Cook, Washington 98605

Growth studies were conducted with Chinook (Oncorhynchus tshawytscha) and coho (O. kisutch) salmon fingerlings to determine the minimal requirements for arginine and histidine. A 40% protein diet containing an essential amino acid pattern similar to that found in whole egg protein was used as the experimental diet. The coho salmon required about 2.3% arginine and 0.7% histidine. The Chinook salmon required 2.4% arginine in the diet and the histidine requirement was placed at about 0.7% of the ration.

² Present address: Department of Animal Sciences, Purdue University, Lafayette, Indiana 47907.

Manuscript received 1 April 1970.