3月龄斜带石斑鱼形态性状对体质量的影响

为明确斜带石斑鱼形态性状与体质量的相互关系,对3月龄斜带石斑鱼体质量、头长、躯干长、体长、全长、体高、体宽、眼间距、眼径、吻长、尾柄高、尾柄长等12个性状的测量数据进行多元分析。结果显示,斜带石斑鱼各形态性状间的相关系数达极显著水平(P0.01);通径分析结果表明,体长、体高、体宽和眼间距对体质量的通径系数达极显著水平(P0.01),其中,体长的直接作用最大,体高、体宽和眼间距主要通过体长间接影响体质量,这4个性状对体质量的共同决定系数之和为0.954。可见,体长、体高、体宽和眼间距是影响3月龄斜带石斑鱼体质量的主要性状。

Effects of Morphometric Attributes on Body Weight of Three-month-old Epinephelus coioides

To explore the relationship between morphometric attributes and body weight of three-month-old Epinephelus coioides,data of 12 morphometric attributes were investigated by using multivariate analysis.The results showed that all the correlation coefficients between morphometric attributes and body weight reached extremely significant level(P ＜0.01).The path analysis revealed that the path coefficients of body length (X3),body height (X5),body width (X6) and eye distance (X7) all reached extremely significant level (P ＜ 0.01),and X3 displayed the highest positive direct effect,X5,X6 and X7 affected body weight indirectly by X3.The total decision coefficient of four morphological attributes to body weight was 0.954.The results indicated that those morphological attributes were the main impact factor for body weight.