Effects of low salinity on the growth and survival of Babylonia lutosa juveniles

We applied two methods of acute and gradual salinity changes in our experiment to explore effects on the growth and survival of Babylonia lutosa juveniles. The average weight was 3. 7 m g and the average shell- height was (2.24 ±0.24) mm . The results showed that the juveniles grew fastest in salinity 28. Abnormal juveniles oi Babylonia lutosa could adapt to the low salinity environment which with higher survival rates than those in salinity 21. The feeding， growth and survival of Babylonia lutosa juveniles were normal under salinity 21 condition. When acute salinity became 18， Babylonia lutosa juveniles could still survive but suffer severe influence on feeding and growth. Those juveniles could not survive when acute salinity change under 15 but gradual salinity change could do with severe influence on feeding and growth. In conclusion， the survival range of Babylonia lutosa juveniles would be wider with gradual salinity change， but the adaptable growth range was limited.