养殖密度对革胡子鲶生长性能及补体C3·C4的影响

Effect of Stocking Density on the Growth Performance and Levels of Complement C3 and C4 in Clarias gariepinus

[目的]研究养殖密度对革胡子鲶生长性能及血清补体C3、C4的影响。[方法]以体重(30.71±0.89)g革胡子鲶为试验对象,测定4种养殖密度(35、65、95、125 kg/m3)下革胡子鲶生长性能及血清补体C3、C4的变化。[结果]养殖60 d后,随着养殖密度升高,革胡子鲶终末重、日增重均呈下降趋势,其中35 kg/m3与65 kg/m3密度组间差异不显著(P>0.05)。各密度处理组间饵料系数均无显著差异(P>0.05)。低密度处理组(35 kg/m3与65 kg/m3)与高密度处理组(95 kg/m3与125 kg/m3)间死亡率差异显著(P<0.05)。养殖密度对补体C3、C4的影响不显著(P>0.05)。[结论]65 kg/m3可推荐为革胡子鲶的最佳养殖生产密度。

[Objective] The effects of stocking density on the growth performance and the levels of complement C3,C4 in C.gariepinus were investigated.[Method] C.gariepinus weighing（30.71±0.89）g were taken as test objects and the changes of growth performance and complement C3,C4 in the serum of C.gariepinus at four culture densities（35,65,95,125 kg/m3） were measured.[Result] After 60 days,the final body weight（BWf） and daily weight gain（DWG） decreased with the increasing of stocking density.There was no significant difference between 35 kg/m3 and 65 kg/m3 treatments（P0.05）.Stocking density did not affect the feed conversion rate（FCR） significantly（P0.05）.Significant difference of the death rate was observed between low density treatments（35 kg/m3 and 65 kg/m3） and high density treatments（95 kg/m3 and 125 kg/m3）（P0.05）.Complement C3 and C4 were not affected by the stocking density significantly（P0.05）.[Conclusion] 65 kg/m3 could be recommended as the best culture density in practical aquaculture.