养殖密度对克氏原螯虾幼虾生长、摄食和饵料利用影响  

Effects of rearing density on growth,food-intake and feed utilization of juvenile Procambarus clarkii

作　　者：邓梦颖[1] 吴志强[1] 肖英平[1] 胡向萍[1] 肖鸣鹤 涂彭文 

机构地区：[1]南昌大学生命科学学院,南昌330031 [2]南昌市水产科学研究所,南昌330000

出　　处：《淡水渔业》2010年第3期13-17,共5页Freshwater Fisheries

基　　金：江西省农业厅农业科技项目(0603-1)

摘　　要：以体重(0.015±0.004)g克氏原螯虾(Procambarus clarkii)幼虾为研究对象,研究了50、100、300、600、900尾/m25种养殖密度对克氏原螯虾幼虾生长、摄食和饲料利用的影响,实验周期为30 d。结果显示:克氏原螯虾幼虾的体长、特定生长率、平均日增重、存活率和蜕壳率都随养殖密度的增大而减小,其中日增重由(0.007±0.002)g下降为(0.002±0.001)g,蜕壳率由(100±0.000)%下降为(37.222±3.928)%,降幅明显;体长、体重变动系数随养殖密度的增大而增大。每组个体的平均摄食量和摄食率均与养殖密度成反比。此结果表明养殖密度的增大总体来说不利于克氏原螯虾幼虾的生长和摄食。在饲料利用方面,饵料转化率在各养殖密度组之间无明显差异;蛋白质特定生长率、脂肪特定生长率和脂肪储积率随养殖密度增大呈减小趋势,蛋白质储积率呈增大趋势。A 30-day rearing experiment was conducted in this study.The initial weight of juvenile Procambarus clarkii was（0.015±0.004）g and the initial rearing density was 50,100,300,600,900 individuals/m2,respectively.The results showed that with the increasing of rearing density,the specific growth rate（SGR）,daily weight gain（DWG）,survival rate and exuviating rate decreased,while the statistics of variation in body length and body weight increased.Among those,DWG decreased significantly from（0.007±0.002）g to（0.002±0.001）g and exuviating rate decreased from（100±0.000）% to（37.222±3.928）%.The results indicated that rearing density had negative effects on growth and food of juvenile P.clarkii in general.The food conversion ratio（FCR） was almost the same.The specific growth rate of protein and lipid and accumulation rate of lipid significantly decreased with the increasing of rearing density,while accumulation rate of protein increased.

关 键 词：养殖密度 克氏原螯虾(Procambarus clarkii) 幼虾 生长 摄食 饲料利用 

分 类 号：S966.12[农业科学—水产养殖]