Nutrition and Feeding of Rainbow Trout
Author | : J. W. Hilton |
Publisher | : Government of Canada, Fisheries and Oceans, Scientific Information and Publications Branch |
Total Pages | : 28 |
Release | : 1981 |
Genre | : Fishes |
ISBN | : |
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This special publication is designed to describe the basic elements of salmonid nutrition. Described are the requirements and functions of nutrients. The feed formulation for salmonids is described, together with the quality control parameters for the most important ingredients in salmonid diets. All fish feeds must be processed to produce feed particles of appropriate size for fish of different ages and sizes. The digestibility and balance of nutrients assumes greater importance in diets for fish because of the importance of preventing eutrophication and increasing the biological oxygen demand in the fish pond. Guides have been established indicating the amount of feed to give daily to fish of various sizes and water temperatures. Fish are poikilotherms whose body temperature, metabolic rate and feeding activity varies with the ambient water temperature. Feeding rates and growth rates are reduced as the temperature is decreased from 15 to 4 C.