【摘要】 摸清豹纹鳃棘鲈(Plectropomus leopardus)形态性状与体质量的关系对其选育工作具有重要意义。以同一批次159尾4月龄豹纹鳃棘鲈为试验对象，测量并探寻其形态性状对体质量的影响效应。结果表明，豹纹鳃棘鲈吻长与体质量的相关性为显著水平(P<0.05)，其余形态性状与体质量的相关性均为极显著水平(P<0.01)；通径分析结果发现，体长、体高、体宽、头高和吻长是影响4月龄豹纹鳃棘鲈体质量的主要形态性状，其中体高主要是通过直接作用影响体质量，而体长、体宽和头高则主要通过体高间接影响体质量；体长、体高、体宽、头高和吻长性状对体质量的共同决定系数之和大于0.85，说明4月龄豹纹鳃棘鲈体质量主要受这5个性状影响。通过回归分析建立多元回归方程，剔除与体质量相关性不显著的形态性状，所得方程保留的形态指标与通径分析结果一致。更多还原

【Abstract】 To understand the relationship between the morphological traits and the body mass of coral trout(Plectropomus leopardus) is important for its breeding. In this study, we selected 159 individuals of the same batch of 4-month-old P. leopardus juveniles as the experimental objects to explore the correlation between the eleven morphological traits and body mass. The results show that there were significnat correlation between snout length(x9) and body mass(P<0.05), and extremely significant correlation between the other ten morphological traits and body mass. The results of path analysis reveals that the standard length(x2), body depth(x4), body width(x5), head height(x7), snout length(x9) were the main decisive morphological traits on body mass. The direct effect coefficient of body depth on body mass was 0.444, indicating that body depth mainly affected body mass through direct action. However, the other morphological traits mainly affected body mass indirectly via body depth. The total decision coefficient of five morphological traits on body mass was 0.853, indicating that these morphological traits were the main factors affecting body mass. After eliminating the morphological traits with insignificant coefficient to body mass, we established the multiple regression equation by multiple regression analysis. The morphological traits retained by the multiple regression analysis were consistent with that by path analysis.更多还原