不同饵料对赤点石斑鱼养殖的影响

Effects of Different Diets on Epinephelus akaara Aquaculture

本文通过对赤点石斑鱼(Epinephelus akaara)亲本强化、苗种摄食卤虫阶段和摄食桡足类阶段的饵料进行研究,结果表明:采用牡蛎作为赤点石斑鱼亲本营养强化饵料使得亲本成活率达89.33%,所产的卵子平均受精率达78.9%、孵化率达80.1%均显著高于使用南美白对虾和蛏子组(P <0.05);苗种培育至摄氏卤虫阶段,采用鱼油(4 g/L)包裹经小球藻强化轮虫 + 虾青素(5 g/L)代替,成活率29.53%,全长增长率175.00%效果最佳;苗种培育至摄氏桡足类阶段,采用鱼油包裹(4 g/L)包裹桡足类 + 虾青素(5 g/L)的培育效果成活率和全长增长率均显著高于其他组(P <0.05);而后期采用软颗粒料(鳗粉:鳀鱼 = 3:2,添加虾青素5 g/kg)可极显著提高赤点石斑鱼的养成成活率和全长增长率(P <0.01)。

We analyzed the bait feeding in broodstock strength, artemia-feeding stage and copepods feeding stage of the red grouper Epinephelus akaara. The result shows that the survival rate of the oyster- feeding broodstock is 89.33%, the fertility rate of the egg is 78.9% and the hatching rate is 80.1% which are significantly higher than those of white shrimp feeding-group and razor clam-feeding group。