维生素C对鱼类营养生理和免疫作用的研究进展

维生素C在机体内具有非常重要的生理功能。它不仅和鱼类的生长密切相关，而且对鱼类的免疫力、抗病力以及抗应激反应都具有非常重要的影响。然而，由于大多数鱼缺乏合成维生素C所需的L广古洛糖酸内酯氧化酶（L-gulonolactone oxidase，GLO），因此，它们必须通过食物获取维生素C。本文就鱼类对维生素C的需求量及其免疫力和抗应激性反应的影响作一综述。

Effects of vitamin C on nutritional physiology and immunity in fish:a review

The data reported in the update literature on the effects of vitamin C on the nutritional physiology and immunity of fish are compiled and discussed.The vitamin C requirements of fishes usually vary to some degrees by species,size,environmental factors and the chemical or physical status of vitamin C.Three evaluation indices(growth,tissue concentration and immunity parameters)are often used to estimate the vitamin C requiement of fish.The vitamin C requirements based on constant tissue concentration of vitamin C are generally higher than those on growth performance.Furthermore,vitamin C requirements based on immunity parameters are much higher than those on contant tissue concentration and growth performance.Usually,high level of dietary vitamin C can increase the resistance to stresses and diseases in fish although there are some study results showing no beneficial effect on the non-specific immunity of fish.The research fields in future are also presented in this review.