【摘要】 本实验选用商品饲料饲养平均初体重为 0 .0 9g的南美白对虾 ,经过 30 d的生长实验 ,研究不同投喂频率对南美白对虾生长、成活以及饲料利用的影响。结果表明 ,随着投喂频率由 3次 /天增加到 5次 /天 ,南美白对虾的增重率、特定生长率和蛋白质效率显著提高 ,而饲料系数则显著降低 ,但当投喂频率由 5次 /天增加到 7次 /天时 ,南美白对虾增重率、特定生长率和蛋白质效率并无显著提高。对对虾全虾体主要组成成分的分析表明南美白对虾体主要组成成分并不受投喂频率增加的影响。更多还原

【Abstract】 The experiment was conducted for one month in order to determine the effects of different feeding frequencies (3, 4, 5, 6 and 7 times every day respectively) on the growth, feed utilization and body composition of Penaeus vannamei with average weight 0.09g, reared with crude protein 42.15%, energy level 18.9Kj/g diet. The results show that the weight gain rate, special growth rate (SGR) and protein efficiency ratio were all significantly increased while the feed coefficient decreased as the feeding frequency changed from 3 times per day to 5 times per day. No significant difference appeared when the feeding frequency was 7 times per day. The composition of main carcass of the shrimp was not affected by feeding frequency.更多还原