养殖密度对杂交鳢仔鱼生长与存活的影响  

Effect of Stocking Density on Growth and Survival of Larval Hybrid Snakehead

作　　者：刘文奎[1] 樊启学[1] 杜海明[1] 董俊峰[1] 张磊[1] 

机构地区：[1]华中农业大学水产学院,武汉430070

出　　处：《淡水渔业》2007年第4期45-48,共4页Freshwater Fisheries

基　　金：湖北省"十一五"重大攻关项目(2006AA203A01)资助

摘　　要：在温棚水族箱中养殖杂交鳢仔鱼,养殖密度分别为0.5、1、2、4、8尾/L,共养殖15 d,试验结果表明:养殖密度在0.5～4尾/L之间,杂交鳢仔鱼的最终体重、特定生长率、日增重都随着养殖密度的增大而升高,当养殖密度为4尾/L时,三者达到最大值;进一步增加养殖密度,仔鱼的生长反而下降。高密度组(4、8尾/L)杂交鳢仔鱼个体生长速度离散度明显加大,仔鱼的成活率随养殖密度增加而下降。Larval hybrid snakehead were stocked and reared in an outdoor tank at a density of 0. 5,1, 2, 4 and 8 ind./L for 15 days. The results showed that final weight, SGR and DWG of snakehead larvae increased with the increasing of density, then reached the highest at the stocking density 4 ind./L. Then the SGR decreased after it reached the peak. The larval in high density groups（4 and 8 ind./L） had great variation in size and growth. The survival rate decreased with stocking density increasing.

关 键 词：杂交鳢 养殖密度 特定生长率 死亡率 

分 类 号：S962.3[农业科学—水产养殖]