饲料蛋白水平对宝石鲈生长和体组成影响研究

选择体重一致、健康无病、初始体重104.13±0.46g宝石鲈105尾,随机分为5组,每组3重复,分别喂以蛋白水平为23.64%、28.45%、33.50%、3.04%和41.62%的等能颗粒饲料(以白鱼粉为蛋白源),在15口水泥池中控温养殖8周,研究饲料蛋白水平对宝石鲈生长和体组成的影响.饲养试验结果表明:饲料蛋白水平为33.50%时,宝石鲈的增重率最大,与饲料蛋白水平23.64%组相比差异极显著(P0.05).试验不同组间鱼体肥满度、肝体指数、蛋白质净利用率和饵料系数没有显著差异(P>0.05).通过增重率的折线法分析结果表明,宝石鲈获得最佳增重率的饲料蛋白需要量为33.94%.饲料蛋白水平对鱼体组成和肌肉成分研究表明,饲料蛋白水平为33.50%时鱼体蛋白含量最高,与蛋白水平23.64%组相比,差异极显著(P0.05).  

EFFECT OF DIETARY PROTEIN LEVELS ON GROWTH PERFORMANCE AND BODY COMPOSITION OF JADE PERCH SCORTUM BARCOO

The effects of dietary protein levels on growth performance and body composition of jade perch were investigated by using white fishmeal as a protein source in pellet feeds.105 jade perch with initial body weight 104.13±0.46g was used in 8-week growth trial.All the test fish were divided into 5 groups with triplicates,which were cultured in 15 concrete tanks at 24±1℃ and fed 5 isoenergic diets containing different protein levels(23.64%,28.45%,33.50%,37.04%,41.62%).The results showed that increase weight rate at 33.50%dietary protein was the highest,which were very significantly (P0.05).