Effects of temperature and salinity on embryos development of Babylonia areolata

Responses of Babylonia areolata embryos to various ambient water temperature and salinity were measured in terms of hatchability and survival rate. The upper and lower limiting ambient temperature were estimated at 20 ℃and 32 ℃ respectively. The optimum ambient temperature for Babylonia areolata embryos was between 26～28 ℃. Time for embryonic development was inversely related to ambient temperature, and the relationship between T and X can be represented by the allometric equation T=438.30 e -0.0433 X (R 2=0.982 3,PS0.01). The upper and lower limiting ambient salinity were estimated at 14 and 32 respectively. The optimum ambient salinity for Babylonia areolata embryos was 20～28. The effects of the appropriate range of salinity on the speed for embryonic development were not obvious.