盐度对克氏原螯虾幼虾生长的影响

The Effects of Different Salinity on Survivals and Growth of Juvenile Procambarus clarkii

研究了不同盐度对克氏原螯虾幼虾生长的影响。试验于水族箱内进行。试验幼虾的初始体质量（1．82±0．21）g，体长（3．13±0．30）cm。在25℃条件下，试验设置0、2、4、6、8、10、12、14计8个盐度梯度，试验结果表明．盐度为0～14时．克氏原螫虾的幼体均能存活与生长。盐度为0～6，成活率较高，生长较快，饵料系数较低，各项指标与对照组差异不显著（P〉0．05）。当盐度超过此范围时．随着盐度增加，幼虾的成活率下降，生长变慢，饵料系数增大，与对照组差异显著（P〈0．05）。

the effects of salinity eight prawn Procambarus clarkii with initi were conducted at 25℃. The results salinity levels of 0,2,4,6,8,10,12 and 14 on the growth of juvenile al body weight of（1.82±0.21） g and length of （3.13±0.30） cm showed that the juveniles could survive and grcw between the salinity of 0 and 14. Within salinity levels from 0 to 6, the growth performance indexes seemed to be good with a high survival rate, a rapid growth, and a low feed ratio at the range of 0 to 6. Each index had no signifi- cant difference with the control group（P〉0.05）. However, the survival rate of the fish dropped down and the growth rate slowed down as the salinity increased beyond the range. The index showed a significant difference with the control group（P〉0.05）.