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将兴凯湖翘嘴鱼白鱼卵放在7组不同水温( 2 1℃、2 3℃、2 5℃、2 7℃、2 9℃、31℃、33℃) ,体积为80cm×5 0cm×5 0cm的水族箱中进行孵化,每组设2个平行组。试验结果表明:在2 1℃～2 9℃下,兴凯湖翘嘴鱼白的孵化率随着水温的升高而增高,其孵化时间也随之缩短;兴凯湖翘嘴鱼白孵化的适宜水温范围为2 5℃～2 9℃,最适水温为2 9℃±1℃,最高致死水温为31℃,当水温高于2 9℃或低于2 5℃时,畸形率增加。2 1℃孵化率为4. 38% ,畸形率为67. 1 3% ,孵化时间为2 9 .33h ,2 9℃时,孵化率为92 . 76% ,畸形率为0 ,孵化时间为1 5 . 2 5h ,31℃时,孵化率为0 . 5 9% ,畸形率为1 6 .1 3% ,孵化时间为1 3 .5h,33℃时,胚胎全部死亡。
The albacore white eggs of Xingkai Lake were placed in 7 groups with different water temperature (21 ℃, 23 ℃, 25 ℃, 27 ℃, 29 ℃, 31 ℃, 33 ℃), the volume was 80cm × 50cm × 50cm aquarium incubator, each set 2 parallel groups. The results showed that the hatching rate of white mulberry in Xingkai Lake increased with the increase of water temperature and the hatching time shortened at 21 ℃ -2 29 ℃. The optimal water temperature range is 25 ℃ ~ 29 ℃. The optimum water temperature is 29 ℃ ± 1 ℃ and the maximum lethal temperature is 31 ℃. When the water temperature is higher than 29 ℃ or lower than 25 ℃, the deformity rate increases. 2 1 ℃ hatching rate was 4.38%, the deformity rate was 67.1%, the incubation time was 29.33h, 29 ℃, the hatching rate was 92.76%, the deformity rate was 0, the incubation time was 1 5.25 h, the hatching rate was 0.59% at 31 ℃, the deformity rate was 16.13%, and the hatching time was 13.5 h at 33 ℃, all the embryos died.