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Trout Production

Feeds and Feeding Methods

Document format: pdf

Publisher: Southern Regional Aquaculture Center

Creation date: May 1999

In trout farming, the amount and suitability of feed used determines the profitability of production. Trout and other salmonids can efficiently digest foods that contain primarily protein (mostly from fish), and can obtain some of their energy from fats and, to a lesser extent, from carbohydrates. Fry and fingerling trout require a higher protein and energy content in their diets than larger fish. Fry and fingerling feed should contain approximately 50 percent protein and 15 to 20 percent fat. Feeds for larger fish typically contain 38 to 45 percent protein and 10 to 18 percent fat. The switch to lower protein formulations usually occurs at the transition from a 'crumble' feed to a pelleted ration, called a 'growout' or 'production' diet. High energy diets may contain 45 to 50 percent protein and 18 to 24 percent fat. Several brands of high quality commercial trout diets are available, and although a farm could produce its own fish food, it is not usually economical to do so.

Key Words: USDA • SRAC • Trout • Feed and Nutrition • Feeding Methods