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Development of Economical, High-Performance, Low-Polluting Feeds and Feeding Strategies

Reporting Period April 1997 to March 1998

Document format: pdf

Publisher: Western Regional Aquaculture Center

Creation date: March 31, 1998

This project will assist and benefit the aquaculture industry by providing information from which wise decisions can be made by both industry and the environmental regulatory agencies concerned with reducing the levels of phosphorus and other pollutants in hatchery effluents. The information generated in this project will provide multiple strategies, such as options to select ingredients, formulations, processing techniques, to reduce pollutant levels in hatchery effluents for the three major life history stages of salmonids. Relationships between the efficiency of utilization of the diet, growth rates of the fish, health indices of the fish, and digestible phosphorus level in the feed will be determined and adjusted to meet the dietary requirement for each life history stage. Information on bioavailability of various key feed ingredients will be used to properly formulate low-polluting feeds. Finally, development of low-ash fish meals will provide the aquaculture industry with more feed ingredient choices from which to formulate feeds and will involve cooperation of the fish meal industry directly with the aquaculture industry.

Key Words: USDA • WRAC • Feed • Nutrition