Effects of sea salinity on the growth and survival of Pinctada margaritifera granosa Larvae and juveniles

These experiments were carried out in the marine culture breeding field of Haiwei,Leizhou,from May to June of 2013.In the condition of controlled sea salinity,the effects of salinity on the growth and survival of Pinctada margaritifera larvae and juveniles are studied.The results show that the suitable salinity for the survival of Straight larvae is 22.85 – 38.86,the most suitable salinity is 27.19 – 35.02;the suitable salinity of growth is 20.43 – 41.23,and the most suitable salinity is 31.10.the suitable salinity for survival of D larvaeis 23.10 – 39.14,and the most suitable salinity is 27.19 – 35.02;the suitable salinity for growth is 20.29 – 40.09,and the most suitable salinity is 31.10 – 35.02.the suitable salinity for the survival of juvenils is 20.64 – 39.10,the most suitable salinity is 27.19 – 35.02;the suitable salinity for growth is 19.38 – 41.30and the most suitable salinity is 27.19 – 31.10..