不同饵料对赤点石斑鱼养殖的影响

Effects of Different Diets on Epinephelus akaara Aquaculture

摘要: 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)。

Abstract: 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 (P < 0.05); when the offspring reaches the artemia-feeding stage, we feed them with fish oil (4 g/L) wrapped by strengthening Chlorella + rotifers astaxanthin (5 g/L) instead and the survival rate is 29.53%; the growth rate of the total length is 175.00% which has the best effects. The survival rate and the growth rate of the total length are significantly higher than other groups when we feed the fish with oil package (4 g/L) package copepoda and astaxanthin (5 g/L) in the copepods feeding stage of the red grouper. Finally, the survival rate and the growth rate of the total length significantly increase (P < 0.01) when the red grouper is feed with soft particle bait (eel powder:anchovy = 3:2, with 5 g/kg astaxanthin) in the later stage.