水温对虎纹蛙受精卵孵化的影响

Effects of Water Temperature on Hatching Fertilized Egg of Tiger Frog

孵化是虎纹蛙（Rana rugulosa）养殖的第一个环节,为研究水温对虎纹蛙受精卵孵化率及蝌蚪成活率的影响,设置了12、14、16、18、20、22、24、26、28、30、32、34、36、38、40、42℃等水温进行虎纹蛙受精卵孵化,记录了48、60、72 h的蝌蚪数量.结果表明,虎纹蛙孵化的合适水温为24-34℃,其孵化率均在70％以上,孵出的蝌蚪24 h成活率均在96％以上;在此水温范围内孵化率随着温度的升高而升高,而蝌蚪24h成活率则没有明显变化.

Hatching was the first part of tiger frog breeding.The fertilized egg of tiger frog were incubated at 12、14、16、18、20、22、24、26、28、30、32、34、36、38、40、42 ℃ to study the impact of the water temperature on hatching rate of fertilized egg and survival rate of tadpole of tiger frog.The number of tadpole after 48、60、72 h were recorded.The results showed that the most suitable water temperature for hatching was 24-34 ℃,with hatching rate of more than 70％ and 24 h survival rate of more than 96％.The hatching rate increased when the water temperature increased,but the 24 h survival rate of tadpole did not change.