三龄太门哲罗鱼外部形态性状对体质量影响效果分析

Effects of Morphometric Traits on Body Weight in 3 Age Taimen(Hucho taimen)

采用相关分析、通径分析和多元线性回归分析方法,分析研究了3龄太门哲罗鱼(Hucho taimen)形态性状对体质量的影响效果,为研究其生长指标提供选择性状。经统计分析表明:3龄太门哲罗鱼全长(X3)、体高(X1)、眼径(X7)和尾柄长(X6)4个形态性状与体质量的相关系数分别为0.961、0.969、0.651和0.547,且均达到极显著水平(P<0.01),4个形态性状对体质量的通径系数也达到极显著水平(P<0.01),对体质量的决定程度由大到小依次为全长>体高>眼径>尾柄长,4个性状与体质量的相关指数高达0.980,是影响体质量的主要形态性状,拟合方程为Y=-2777.45+167.485X3+50.90X1-53.46X7+145.56X6。

The relationships between morphometfic traits and body weight in 3 age taimen （Hucho taimen） were analyzed by correla- tion analysis, path analysis and multiple regression. The results showed that all the correlation coefficients of each rnorphometric trait to body weight were at very significant level （P〈0.01）, with the correlation coefficient at 0.961 for total length, 0.969 for body height, 0.651 for eye diameter, and 0.547 for caudal peduncle length. The path coefficients were also found very significant level （P〈0.01）, and the total length showed the significant effect on the body weight, followed by body height, eye diameter and caudal peduncle length. The correlation index for the 4 traits to body weight was 0.980, and the multiple regression equation relating to the body weight was established as Y=-2777.45＋167.485X3＋50.90X1-53.46X7＋145.56X6,where y is body weight,X1 total length,X3 body height,X6 eye diameter, and X caudal peduncle length.