在渔业生产中,常因水中溶氧低导致鱼类呼吸困难,甚至窒息死亡。夏季水温升高,溶氧量降低,鱼类出现“浮头”现象;在鱼类运输过程中由于缺氧也常出现大批死亡的现象,对渔业生产造成大量的经济损失。氨基酸可以提高水产动物的抗应激能力,各种应激源如高密度饲养、水质污染、捕捞、病原微生物、环境的变化及水温、气候、饲料、水体的改变等均可以导致水产动物的应激反应,添加氨基酸可以抵抗这些应激反应,减少养殖中的损失和风险。甘氨酸(Gly- In fishery production, often due to low dissolved oxygen in water leading to respiratory dyspnea, or even suffocation. In summer, the water temperature is increased, the dissolved oxygen level is reduced, and “floating head” occurs in the fish. Large numbers of deaths often occur during the transportation of fish due to lack of oxygen, which cause a great deal of economic loss to fishery production. Amino acids can improve the anti-stress ability of aquatic animals. Various stressors such as high-density feeding, water pollution, fishing, pathogenic microorganisms, environmental changes and water temperature, climate, feed, water changes can lead to aquatic animals should Shock response, adding amino acids can resist these stress reactions, reduce the loss and risk in farming. Glycine (Gly-