不同投喂率对南方鲇稚鱼生长和存活率的影响  

Impacts of Different Feeding Rates on the Growth and Survival Rate of Silur meridionalis Juvenile

作　　者：史则超[1] 陈孝煊[1] 王卫民[1] 姬伟[1] 

机构地区：[1]华中农业大学水产学院,湖北武汉430070

出　　处：《水生态学杂志》2008年第5期93-96,共4页Journal of Hydroecology

摘　　要：以6个水丝蚓投喂水平培育6日龄南方鲇稚鱼,测定了不同投喂率下稚鱼的摄食水平、生长、存活率和残食率。结果表明,鱼苗体长小于5cm时,投喂鱼苗体重60%的饵料鱼苗生长最快,特定生长率高达19.1%;体长大于5cm时,体长增长和体重特定生长率以50%投喂率组较高,但与60%投喂率组的差异不显著。A、B、C、D、E和F组(分别投喂30%、40%、50%、60%、70%和80%稚鱼体重的饵料)的存活率分别为56%、75%、87%、89%、91%和90%。A、B组的残食率较高,分别是30%和19%;E、F组最小,分别是4%和4.5%。Growth and survival rates of 6 day old Silur meridionalis juveniles feeding on Limnodrilus at 6 different levels for 21 days were investigated. The results showed that the juveniles at 60% feeding rate grew faster than any other levels when the body length was less than 5 centimeters and 50% feeding rate resulted in faster growth with more than 5 centimeters. The survival rates of group A,B,C,D,E and F（feeding quotiety were 30% ,40% ,50%, 60% ,70% and 80% ）were 56% ,75% ,89% ,93% ,94% and 91% respectively. The cannibal rate of A and B was 30% and 19%, higher than all other groups. The cannibal rate of group E and F was lower, 4% and 4.5% respectively.

关 键 词：南方鲇 投喂率 存活率 生长 

分 类 号：S965[农业科学—水产养殖]