【摘要】 运用统计分析方法研究了吉富品系和埃及品系尼罗罗非鱼(Oreochro misniloticus)2龄成鱼雌、雄个体的出肉率和可量性状之间的相关性。结果显示,尼罗罗非鱼的平均出肉率为38.68%,雄性个体出肉率比雌性个体略高,吉富品系出肉率比埃及品系略高。尼罗罗非鱼出肉率与可量性状间存在较强的线性关系,拟合方程相关系数为0.985。在有显著意义的可量性状相关系数中(P<0.01),与肉片质量和出肉率的相关性均最高的可量性状为体质量,相关系数分别为0.964和0.575;其次为体高、体长和体厚。而头长与肉片质量、出肉率均呈负相关关系。雄性个体的相关系数均高于雌性个体,在雄性个体中,出肉率与体质量的相关系数为0.630,与体高的相关系数为0.617,均为中等程度相关。对可量性状之间的比值与出肉率进行相关性分析,相关系数普遍比单个性状高,特别在雄性个体中表现明显。其中相关系数较高的比例组合有身长/头长比值(0.765)、体长/头长比值(0.732)、身长/体厚比值(0.703),均达到较强程度的相关,比单个性状的相关性有明显提高。结果表明,利用可量性状预测罗非鱼的出肉率是可行的。更多还原

【Abstract】 The correlation between body measurements and fillet yield of 2-year female and male individuals in GIFT strain and Egypt strain Nile tilapia(Oreochromis niloticus)was studied by statistics analysis.The average fillet yield in Nile tilapia was 38.68%,and the fillet yield value of males was slightly higher than that of female;the fillet yield value of GIFT strain was slightly higher than that of Egypt strain.The results showed there was a strong linear relationship between body measurements and fillet yield(R=0.985).Body weight had the highest value of correlation coefficient to fillet weight(0.984)and fillet yield(0.575),respectively,followed by body depth,standard length and body width.While there were negative correlations between head length and both fillet weight and fillet yield. The correlation coefficient of male was higher than that of female,which was 0.630 between body weight and fillet yield and 0.617 between body depth and fillet yield indicating a medium correlation.Correlation between fillet yield and ratio of two body measurements was higher than the individual variables,especially in male fishes.The following ratios of two body measurements showed stronger correlations with fillet yield than the individual variables,corrected length/head length(0.765),standard length/head length(0.732),corrected length/body depth(0.703)and body weight/standard length.It was concluded that it is possible to predicting fillet yield based on body measurements in Nile tilapia.更多还原