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U. S. Fish and Wildlife Service, Western Fish Nutrition Laboratory, Cook, Washington and Department of Biochemistry, Purdue University, West Lafayette, Indiana
The threonine requirement of chinook salmon has been investigated in three separate feeding trials at 8° and at 15°C. The threonine requirement of chinook salmon fed 40% of crude protein diets remained consistent at approximately 0.9% of the dry ration.
2 Presented at the meetings of the American Institute of Nutrition, Philadelphia, Pennsylvania, April, 1958.
3 Purdue University Agricultural Experiment Station Journal Paper no. 1800.
4 Present address: A. E. Staley Manufacturing Company, Decatur, Illinois.
Manuscript received 21 August 1961.