Effects of Different Feed and Coarse Fish on Growth and Immunity of Grouper(Epinephelus coioides)
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摘要: 选取平均体重为76.9g.尾-1的斜带石斑鱼,进行膨化颗粒饲料、软颗粒饲料和小杂鱼对其生长速度、饲料效率、肌肉营养成分及免疫力影响的比较研究。2 400尾分成6组,分别为试验组1号(市售石斑鱼膨化颗粒料1)、2号(市售石斑鱼膨化颗粒料2)、3号(市售石斑鱼膨化颗粒料3)、4号(市售石斑鱼粉料1)、5号(市售石斑鱼粉料2)、对照组6号(小杂鱼),每组设2个重复,经过60d的饲养,结果表明:小杂鱼组生长速度最快,其次是软颗粒饲料组,最后是膨化颗粒饲料组;小杂鱼组、软颗粒饲料2(5号)饲料系数最低;软颗粒饲料组蛋白质效率最高;小杂鱼组、软颗粒饲料2(5号)具有改善斜带石斑鱼非特异性免疫功能的作用(P<0.05)。综合分析生长指标、饲料系数、免疫力等因素,人工配合饲料可替代小杂鱼。Abstract: 2400healthy Epinephelus coioides with an average weight of 76.9g were randomly divided into six groups-commercial pellets feed 1(No.1),commercial pellets feed 2(No.2),commercial pellets feed 3(No.3),commercial powder feed 1(No.4),commercial powder feed 2(No.5)and coarse fish(No.6,as control),and fed with the experimental diets and coarse fish for 60d.Effects of different feed and coarse fish on growth,feed conversion ratio and immunity of Epinephelus coioides were examined.The results showed that the group of coarse fish had the highest growth rate,followed by soft pellet feed group,and the last is hard pellet feed group.The group of coarse fish and commercial powder feed 2(No.5)had the lowest feed conversion ratio.The soft pellet feed group had the highest protein efficiency.No.6,No.5 had significant effect on the non-specific immunity of Epinephelus coioides(P<0.05).Based on calculating weight gain,feed conversion rate and immunity,coarse fish can be completely replaced by formula feed for grouper(Epinephelus coioides)without affecting the growth performance.
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Key words:
- Epinephelus coioides /
- formula feed /
- trash fish /
- growth /
- immunity
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