黑蝶贝苗种中间培育技术的初步研究

以黑蝶贝野生群体人工繁育苗种为研究材料,探索了大、小两种规格和不同吊养深度对黑蝶贝苗海区中间培育的影响。将壳长、体质量分别为(4.12±0.019)mm、(0.07±0.008)g,(2.02±0.012)mm、(0.03±0.005)g两种规格黑蝶贝吊养于2m、4m、5m区,每组黑蝶贝500枚,养殖水温23.09~29.77℃,养殖海区水深8~10m。每隔30d随机抽取50枚贝苗测量壳高、壳长、壳宽、体质量。经180d中间培育,壳长(4.12±0.019)mm的黑蝶贝生长速度明显大于壳长(2.02±0.012)mm的黑蝶贝,表明壳长(4.12±0.019)mm的黑蝶贝出池移入海区养殖较理想。同一规格贝苗在2m、4m、5m养殖水层的成活率差异不显著(P0.05),而3个不同养殖水层中不同规格贝苗养殖成活率差异显著(P0.05)。该研究结果为进一步开展黑蝶贝苗种人工繁育提供了重要参考。

Intermediate Culture of Blacklip Pearl Oyster Pinctada margariti f era Juveniles

This study was conducted to investigate the effects of shell length of (4 .12 ± 0 .019) mm and (2 .02 ± 0 .012) mm ,body weight of (0 .07 ± 0 .008) g and (0 .03 ± 0 .005) g ,and rearing depth of 2 m ,4m and 5 m on the rearing performance of blacklip pear oyster Pinctada margariti f era under conditions of 500 ind per treatment at water temperature of 23 .09—29 .77 ℃ in a 8—10 depth coast during the intermediate 180 day culture period .The results showed that the large size fingerlings had significantly higher growth rate than the small‐sized fingerlings did ,indicating that (4 .12 ± 0 .019) mm fingerling was more suitable for transferring from hatchery to sea‐cages .There was no significant difference in survival in the finger‐lings with same sizes cultured at the depth of 2 m ,4 m and 5 m (P>0 .05) ,but the survival of fingerlings with different sizes was significantly different when cultured at different depth (P<0 .05) .The findings provide valuable information on the artificial breeding of blacklip pearl oyster .