Effects of temperature and salinity on the hatching of eyed eggs of Oncorhynchus mykiss

In order to determine the suitable temperature and salinity for eyed eggs of Oncorhynchus mykiss, we studied the effect of temperature and salinity on the hatching of eyed eggs by setting different temperatures and salinities. The results showed that the suitable temperature range for hatching was 8~16℃ with hatching rate higer than(73.33±2.04)%. The most suitable temperature was 10℃ with a high hatching rate of(87.77±1.23)%. The eyed eggs didn't hatch when the temperature was higher than 24℃. In the temperature range of 6~22℃, there was a negative correlation between the hatching time and temperature. The average accumulated temperature for embryo development was 343℃·d. The suitable salinity range for hatching was 0~15 with hatching rate higher than(85.33±1.92)%. The most suitable salinity was 0 with a high hatching rate of(97±1.13)%.The hatching rate was 0 when the salinity was more than 15. In the salinity range of 0~15, there was a positive correlation between the hatching time and salinity.