Northwest Fisheries Science Center

Physical and chemical characteristics of commercial microparticulate fish diets

Live foods have traditionally been used in rearing larval marine fish. Formulated diets provide an alternative to live food, but their nutritional quality decreases within 60 to 120 seconds after being added to the rearing tank. To evaluate their effectiveness, detailed information is needed on density, settling velocity, leaching rate, and physical stability. This information will be used to develop improved microparticulate diets, improve water quality, and reduce water treatment costs.