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在辽宁省沿海首次对西施舌室内人工育苗进行了研究。试验结果表明,对西施舌种贝促熟62d,用流水刺激的方法诱导亲贝排放精、卵,亲贝个体排放比例达到60%以上,个体排卵量约为380～420万粒,其受精率为82 0%,孵化率为46 0%。在盐度为25 6～31 0,水温为23 8～25 9℃的条件下,浮游幼虫9～14d进入附着变态期,变态率为12 4%,壳长生长速度为13 9μm/d。变态后的36d内,壳长平均生长速度为76 3μm/d,成活率为80 4%。沙盘单位面积附苗量为波纹板的48 5倍。本次试验利用12m3水体育出2 5mm的稚贝21 4万枚,单位水体出苗量为1 78万枚/m3。
In the coastal area of Liaoning Province for the first time Xichigu indoor artificial seedlings were studied. The test results showed that when the milk was cooked for 60 days, the rate of the progeny released by progeny was over 60%, and the ovulation rate was about 380-4.2 million. The fertilization rate 82 0%, hatching rate 46 0%. Under the conditions of salinity 25 6 ~ 31 0 and water temperature 23 8 ~ 25 9 ℃, the larvae entered into the attachment metamorphosis 9 ~ 14d with the metamorphosis rate of 12 4% and the growth rate of the shell length of 13 9μm / d. Within 36 days after metamorphosis, the average growth rate of shell length was 76 3 μm / d and the survival rate was 80 4%. Sand table per unit area with seedlings for the corrugated board 48 5 times. In this experiment, 21 4 000 juveniles of 2 5 mm were spawned with 12 m 3 of water, and the number of seedlings in the unit of water was 1 78 000 / m 3.