ABSTRACT
Intensively cultured fish and crustaceans rely on prepared diets to be fed to the cultured organism. With its moderate protein level distiller dried grains with solubles appears to be a desirable ingredient for many formulated freshwater crustacean diets. Distiller’s dried grains with solubles has been shown to be a suitable ingredient in diets for turkeys at inclusion rates of 3 to 5 percent; dairy cows; beef cattle; chicken at inclusion levels of 5 to 10 percent; as well as use in diets for ducks, swine, rabbits, and dogs. Use of brewery by-products could allow for more flexible diet formulations in finfish. Brewer’s grains, brewer’s grains with yeast, malt protein flour, and brewer’s yeast are all by-products of the brewery industry. Use of brewer’s yeast in fish diets has been evaluated in several fish species. While brewer’s yeast can be used as an alternative protein source in diets, its high cost precludes most practical diets from containing high percentages.
