饵料密度对杂交鳢仔鱼生长、存活的影响  

Effects of Prey Density on the Growth and Survival of Larval Hybrid Snakehead

作　　者：刘文奎[1] 樊启学[1] 朱邦科[1] 杜海明[1] 

机构地区：[1]华中农业大学水产学院,武汉430070

出　　处：《华中农业大学学报》2007年第3期367-370,共4页Journal of Huazhong Agricultural University

基　　金：湖北省"十一五"重大攻关项目(2006AA203A01)资助

摘　　要：研究了饵料密度（每毫升0.1个、0.3个、1.0个、3.0个和10.0个）对3种规格（Ⅰ：0.68 cm;Ⅱ：1.50 cm;Ⅲ：3.20 cm）杂交鳢仔鱼生长、存活的影响。结果表明：在饵料密度为每毫升0.1～1.0个的范围内,3种规格仔鱼的特定生长率随饵料密度增加而显著升高,当饵料密度为每毫升1.0个时,特定生长率达到最高值,随着饵料密度进一步增加,规格Ⅰ仔鱼的特定生长率随饵料密度的增加而下降,规格Ⅱ、Ⅲ仔鱼的特定生长率无显著变化。饵料密度对成活率没有显著影响,各饵料密度组的成活率都很高。规格差异对饵料密度不敏感,3种规格仔鱼的最适饵料密度均为每毫升1.0个。The effects of prey density （0. 1,0. 3,1.0,3. 0 and 10. 0 preys per millilitre） on growth and survival in different body sizes （0. 68 cm, 1.50 cm, 3.20 cm） of larval hybrid snakehead were investigated. Growth of three sizes of larvae snakehead increased with prey density from 0. 1 to 1.0 prey per millilitre. The specific growth rate （SGR） was the highest at 1 prey per millilitre. When prey density was higher than 1 prey per millilitre, SGR of size-Ⅰ larvae decreased while no significant changes observed in those of size-Ⅱ and size-Ⅲ. Prey densities did not significantly affect survival rates, and survival rates were high in different size group. Body size was insensitive to prey density. The best prey density was 1 prey per millilitre in all treatments.

关 键 词：杂交鳢 仔鱼 饵料密度 生长 存活 

分 类 号：Q959.481[生物学—动物学]