摘要
以添加0、0．2％、0．4％、0．8％和1．6％半乳低聚糖（GOS）的饲料投喂军曹鱼（Rachycentron canadum）8周，研究GOS对军曹鱼生长、部分血清免疫和生化因子的影响。当饲料中GOS的添加水平低于0．4％时能促进军曹鱼生长，但影响不显著（P〉0．05）。在饲料中添加适当水平的GOS对军曹鱼血清溶菌酶和超氧化物歧化酶（SOD）活性有显著的促进作用，而对过氧化氢酶（CAT）活性有显著的抑制作用。GOS对军曹鱼血清生化因子如总蛋白、白蛋白、球蛋白、总胆红素和直接胆红素的浓度有显著影响，对间接胆红素的影响不显著；只有GOS为0．2％的试验组血清总胆固醇浓度显著高于对照组，而0．4％的试验组血清天门冬氨酸氨基转移酶（AST）浓度显著低于对照组；当添加量低于0．8％时，碱性磷酸酶（AKP）活性随饲料中GOS含量增加而降低。结果表明，在饲料中添加适当水平的GOS有利于军曹鱼的生长，并且能够改善军曹鱼的免疫功能和健康状况，其最佳添加量为0．2％～0．4％。
To study the effects of galacto-oligosaccharides （GOS） on the growth performance, serum immunological and biochemical factors of cobia （Rachycentron canadum）, we supplemented GOS in the feed at different levels （0, 0. 2% , 0. 4%, 0. 8% and 1.6% ） and fed the cobia for 8 weeks. The addition level lower than 0. 4% improves the growth rate insignificantly （P 〉 0. 05 ）. The activity of serum lysosome and superoxide dismutase is improved significantly by GOS supplementation. However, the catalysase activity is inhibi- ted significantly. The serum biochemical factors including the total protein, albumin, globulin, total bilirubin and direct bilirubin are influenced significantly by GOS supplementation, but no significant influence is observed on the indirect bilirubin. The concentration of serum cholesterol is significantly higher in the experimental group supplemented with 0. 2% GOS than in the control, and the concen- tration of aspartate aminotransferase （AST） is significantly lower in the group supplemented with 0. 4% GOS than in the control. The AKP activity decreases with the increase of GOS concentration when GOS concentration is lower than 0. 8%. In conclusion, the growth rate and immunological function of cobia can be improved by GOS supplementation in the feed at proper level, and the optimal concen- tration is 0. 2% -0. 4%.
出处
《南方水产科学》
CAS
2011年第1期56-61,共6页
South China Fisheries Science
基金
国家高技术研究发展计划(863计划)项目(2010AA100301)
关键词
半乳低聚糖
军曹鱼
免疫因子
理化因子
galaeto-oligosaceharides
eobia （Rachycentron canadum）
immunological factors
biochemical factors
