| abstract |
(57) [Summary] [Structure] A feed for crustaceans having an improving effect on stress, which is nutritionally fortified by DHA or its ester and / or phospholipid. DHA or its ester and / or phospholipid varies depending on the purity, content, composition of the feed, etc., but is used in an amount of 1 to 2% by weight of the former and 3 to 5% by weight of the latter as a lipid amount relative to the compounded feed. High-purity DHA ethyl ester is preferred as the DHA ester. Soybean lecithin is preferred as the phospholipid. The target crustacean is not particularly limited, but as is clear from the drawings showing the effect of DHA ethyl ester on the body weight of prawns, Most suitable for juvenile shrimp. [Effect] It is possible to provide a crustacean feed suitable for producing cultured seedlings that is effective in reducing stress such as salt stress and water temperature stress. |