动物营养学报2008，Vol.20Issue(4)：482-488,7.
饲料维生素A对美国红鱼生长和免疫的影响
Effects of Dietary Vitamin A Levels on Growth and Immune Response of Red Drum (Sciaenops Ocellatus L.)
摘要
Abstract
A single factor design was conducted to study the effects of dietary vitamin A on growth (weight gain rate, specific growth rate, survival rate and feed efficiency ratio) and immune response (lysozyme activity, superoxide dismutase (SOD) activity and total complement activity) of red drum (Sciaenops Ocellatus L. ). Three hundred fish with body weights of (151.46±8.18) g were randomly allocated to 5 treatments with 3 replicates each and 20 fish in each replicate. Six treat-ments were fed with 5 iso-nitrogenous and iso-energetic diets containing 5 levels of vitamin A (30, 4 166, 8 533, 18 532 and 33 263 IU/kg diet, respectively), and the experiment lasted for 8 weeks. The results showed that, 30 IU/kg treatment had the lowest weight gain rate, specific growth rate, survival rate and feed efficiency ratio, and lower than those in 4 166,8 533,18 532 IU/kg treatments significantly (P<0.05). Specific growth rate and feed efficiency ratio in 33 263 IU/kg treatment were lower than those in 4 166, 8 533, 18 532 IU/kg treatments significantly (P<0.05). The lysozyme activity, SOD activity and total complement activity in 30 IU/kg treatment were significantly lower than those in other treatments (P<0.05). The maximal level of lysozyme activity was in 18 532 IU/kg treatment, followed by 8 533, 4 166, 33 263 IU/kg treatments. The maximal level of SOD activity and total complement activity was in 8 533 IU/kg treatment, and higher than those in 4 156, 18 532, 33 263 IU/kg treatments significantly (P<0.05). In conclusion, the growth performance and im-mune response of red drum could be improved significantly by the proper dietary vitamin A level, and optimum level of vita-min A to improve growth performance and immune response of red drum was 8 533 IU/kg.关键词
美国红鱼/VA/生长/免疫Key words
Red drum (Sciaenops Ocellatus L.)/Vitamin A/Growth/Immunity分类
农业科技引用本文复制引用
周立斌,王安利,张伟,马细兰,路大维,张海发,刘付永忠..饲料维生素A对美国红鱼生长和免疫的影响[J].动物营养学报,2008,20(4):482-488,7.基金项目
National Key Technology R＆D Program(2007BAD29B04), Foundation of Science and Technology of Guangdong Province (2007B020708013), Foundation of Science and Technology Thriving Ocean and Fishery(A200501G01) （2007BAD29B04）
