The major components of a typical 35 percent protein shrimp diet are wheat flour (35 percent), soybean meal (20 percent) and fishmeal (25 percent) (Hunter and Chamberlain, 2006) and perhaps yeast. These ingredients provide the protein, amino acids, and energy in the diet.
Some fishery by-products other than fishmeal include squid meal, squid liver meal, crab meal, shrimp meal, and krill meal. Some animal by-products include poultry by-product meal and hydrolyzed feather meal. Poultry by-product meal can potentially replace up to 67 percent of fish meal in well-balanced diets. Feather meal with amino acid supplementation could potentially replace up to 33.3 percent of fish meal, based on recent research. Products like blood meal and whey products are not generally used in shrimp diets.
Feed quality, feed freshness, feeding strategy, shrimp health, stocking density, size of shrimp at harvest and pond management all interact to determine the final FCR achieved, it is multifactorial growth parameter. Good feed management is as important as feed quality and needs careful attention to reduce feed wastage.