浅海网箱中刺参幼虫培育试验

Study of cultivation technology of the sea cucumber Apostichopus japonicus larvae in offshore net cage

通过开展室内外刺参产卵孵化效果比较,并采用投喂海洋红酵母与覆盖遮阳网两种方法进行浅海网箱刺参幼虫培育比较试验,进一步优化刺参苗种培育方式。研究表明,水温为19.8-22.0℃,浅海网箱中受精卵孵化率为52.4%-57.9%,低于室内孵化率。投喂海洋红酵母组幼虫日均增长86.4μm/d,存活率为（55.1±8.0）%,不投喂海洋红酵母组幼虫日均增长85.1μm/d,存活率为（53.0±7.5）%。投喂海洋红酵母组与不投喂海洋红酵母组有差异但不显著。覆盖遮阳网组幼虫7 d时存活率为（52.8±7.4）%,显著高于不覆盖遮阳网组（46.9±7.0）%。因此,通过实施室内产卵孵化提高孵化率,并对浅海网箱覆盖遮阳网,有效地将室内小水体与天然水域大网箱相结合,提高浅海网箱幼虫苗种繁育效率。

Under different hatchery conditions, effects of diet and environment on growth and survival of the sea cucumber Apostichopus japonicus larvae were investigated for 7 days by feeding oceanic red yeast or shading net covering. The results showed that the survival rates of the cage hatchery group were over 52. 4 % ？ 57. 9% , which was lower than the indoor hatchery group. When feeding with oceanic red yeast, the larvae growth rate was 86. 4 [ xm/d , the survival rate was （55. 1 ± 8. 0 ） % When feeding with no diets, the growth rate was 85. 1 （ xm/d, the survival rate was （53.0 ±7.5）%. No significant difference was found between fed and unfed group. The larvae survival rate in net covering group was （52. 8 ±7. 4） % , which was signifi-cantly higher than the survival rate （46. 9 ± 7. 0 ） % in uncovering group. These results should be valuable todirect the technique optimization of artificial breeding for the hatchery production of A. japonicus larvae.