饲料形状对克氏原螯虾摄食率和生长的影响

Effect of Feed Shape on Feeding Rate and Growth of Crayfish (Procambarus clarkii)

采用4种成分完全相同而形状不同(棱柱形、圆柱形、药片形、圆球形)的饲料饲喂克氏原螯虾30d,通过比较摄食率和相对生长率探讨饲料形状对虾蟹类水产经济动物生长的影响。结果表明,饲料形状对克氏原螯虾的摄食率和相对生长率均有显著影响。棱柱形饲料的摄食率和相对生长率均最高,且显著高于其他3组(P<0.05);圆球形饲料的摄食率和相对生长率均最低,且显著低于其他3组(P<0.05);圆柱形和药片形饲料的摄食率和相对生长率均居中,二者间无显著差异(P>0.05)。

Crayfish（12.5±1.8）g were raised for 30 d with the same ingredient feed in different shapes including prism,column,pellet and tablet to study the effect of food shape on feeding rate and relative growth rate.The results showed that the feed shape could affect feeding rate and relative growth rate of crayfish remarkably.The prism shape was preferable as the feeding rate and relative growth rate of the crayfish in this group was significantly higher than the other three shapes（P0.05）;while that of crayfish feed with feed of pellet shape was significantly lower than the three other shapes（P0.05）;and there was no significant difference between that of crayfish feed with feed in the shape of column and tablet（P0.05）.