摘要
选取了初孵仔鱼90日龄的大菱鲆114尾,测定了全长、体长、头长、吻长、体高、尾柄高、尾柄长和体重等8项性状。采用相关分析和通径分析方法,剔除了与体长有共线性的自变量全长,计算了以测量性状为自变量对体重依变量的相关系数、通径系数、决定系数及相关指数,建立测量性状对体重的回归方程。结果表明,大菱鲆7个测量性状均与体重的相关系数达到极显著水平(P<0.01);体长、体高和尾柄高对体重的通径系数达到显著水平,是直接影响体重的重要指标,决定系数分析结果与通径分析结果有一致的变化趋势;所选测量性状与体重的复相关指数为R2=0.895,是影响体重的主要自变量;多元回归分析建立了体长(X2)、体高(X5)和尾柄高(X6)对体重(Y)的回归方程。
The effects of metric traits on body weight of turbot were analyzed, using correlation analysis and path analysis. Data for this study were collected from 114 fry 90 days after hatch in Haiyang city, Shandong Province. The total length （X1）, body length （X2）, head length （X3）, snout length （X4）, body depth （X5）, caudal peduncle depth （X6）, caudal peduncle length （XT）and body weight （Y） were measured. Total length was eliminated from the variable data set because it was co-linear with body length. Seven metric traits were used as independent variables, and body weight was used as a dependent variable for path analysis. Path coefficients （Pi）, determination coefficients （di） and correlation index （R2） were calculated in path analysis. The results showed that all seven correlation coefficients between each metric traits and the weight achieved were all very significantly different （P〈0.01）. The path coefficients （Pi） of the body length （X2）, body depth （X5） and caudal peduncle depth （X6） to the body weight all reached a level of significance. These attributes were very indicative of determining the body weight. Judging from the result of high correlation index （R^2 =0. 895）, the main variables （X2, X5, X6） were selected. The multiple regression equation of body length （X2）, body depth （X5） and caudal peduncle depth （X5） to the body weight was obtained. This paper provides a theoretical support for genetic breeding of turbot.
出处
《海洋水产研究》
CSCD
北大核心
2008年第6期33-39,共7页
Marine Fisheries Research
基金
国家科技部农业科技成果转化资金项目(2006GB23260378)
国家863计划项目(2006AA10A404)
上海水产大学研究生科研基金项目(科06-111)共同资助
关键词
大菱鲆
测量性状
体重
通经分析
回归模型
Scophthalmus maximus Morphometric Body weight Path analysis Regression equation
