Abstract：In this study, the effect of temperature on embryonic development of
Oryzias melastigma were studied by observation of incubation period, hatching rate and deformity rate at water temperature of 19 ℃, 22 ℃, 25 ℃, 28 ℃, 31 ℃ and 34 ℃. The result indicated that the fertilized eggs can be hatched within 19.8-33.8 ℃. Specifically, there was a negative correlation between hatching time and temperature within certain range. Under the temperature of 34 ℃, the incubation period of embryos was 8.5 days. At 28 ℃, the embryo hatching rate was the highest. The optimal temperature range for the hatching of fertilized eggs was 24.8-30.5 ℃,with the optimum of 28 ℃. High and low temperature would increase the deformity rate of newly hatched larvae. The biological zero was calculated to be 14.89 ℃ and effective accumulative temperature degree was found 3 919.04 ℃·h for embryonic development. This study provided reference for the artificial breeding of
O.
melastigma.
2020,39(6): 658-663 收稿日期：2020-07-13
分类号：S917;Q132.7
基金项目：烟台科技计划项目（2018SFBF084；2019ZDCX018）；国家重点研发计划项目（2018YFC1406406）
作者简介：刘凯凯(1992-),男,研究实习员,研究方向:鱼类发育和生态学研究,E-mail:1040039367@qq.com
*通信作者：于道德,E-mail:yudaode@shandong.cn
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