Abstract:The effects of temperature and salinity on the survival and growth of larval Hexagrammos otakii Jordan et Starks were studied. It showed that the newly hatched larvae and 10 dph larvae of H. otakii Jordan et Starks could survive and grow at temperature of 4~16℃, with the survival rate of more than 84%, while the survival rate was below 50% at 20℃. Under gradual salinity change, the survival rate was more than 90% at salinity of 10~30.The survival rate was zero when the salinity was 5 and below, and the ability of adapting to high salinity was also poor. Under sudden salinity change,the survival rate was more than 95% at salinities of 25 and 30, and the survival rate was 56%~75% at salinity of 10~20. The most suitable temperature range is 12~16℃，and the most suitable salinity range is 25~30 for H. otakii Jordan et Starks.
