||The content and source of protein and the composition of amino acids are important in artificial feed, because the ingredients of most feed raw material lack Arginine, L-Lysine and Phenylalanine. High levels of growth, food conversion and survival were obtained with a diet containing 31.5g Arginine/kg diet, L-lysine 26.0/kg diet and Phenylalanine 14.0/kg diet in shrimp culture.
||One of the most important components, lecithin, can improve the stability of feed particles in water, postpone the dissolving of water-soluble nutrients, and help the absorption and digestion of lipids.
||Polyunsaturated fatty acids
||Another important component, �-3 polyunsaturated fatty acids, can improve the growth and increase the survival rate.
||Most aquatic animals can't make vitamin C in their bodies. Vitamin C deficiencies in shrimp will result in black death diseases, decreased frequency of molting, prolongation of the molting cycle, softening of the shell, and high mortality. For larval fish, a deficiency in vitamin C will induce a decrease in appetite and deformed fish.
||Crustaceans can not synthesize cholesterol and need to obtain it from food. A deficit of cholesterol will cause lower growth and survival rates and a longer molting period.
||Glucosamine can help to synthesize chitin in crustacean shells,which aids growth.
||Astaxanthin increases the immunity and the optimum requirement is 40-60ppm.
||Improves and aids the metabolism of the digestive system of the larvae
||Maintains the breeding ponds so that sediment does not collect on the bottom, and also controls water quality.
||Chitosan and 帣-1,3 glucans boosts wound dressing, anti-infection of virus, antibody