摘要
选取野生鸭绿沙塘鳢74尾,分别测量全长(X1)、体长(X2)、体高(X3)、尾柄高(X4)、眼间距(X5)、尾柄长(X6)、头长(X7)、眼径(X8)、头高(X9)、吻长(X10)、眼后头长(X11)和体质量(Y)共12个形态学指标。运用回归分析、相关分析和通径分析,确定影响体质量的主要形态性状,建立最优回归方程,并分别计算主要形态性状的相关系数、通径系数和决定系数,分析形态性状对体质量的影响效果,结果表明体质量变异系数最大(55.72%)。回归分析表明,体长(X2)对体质量的影响达极显著水平,全长(X1)、体高(X3)和尾柄高(X4)达到显著水平,以全长(X1)、体长(X2)、体高(X3)和尾柄高(X4)为自变量,以体质量(Y)为依变量的最优回归方程为Y=-46.510-3.810X1+5.148 X2+16.939 X3+23.829 X4,其复相关系数(R)、相关指数(R2)和校正相关指数(R2)分别为0.934 5、0.873 3和0.866 0。主要形态性状间的表型相关系数均达到极显著水平(P<0.01)。通径分析得出,全长(X1)、体长(X2)、体高(X3)和尾柄高(X4)通径系数分别为-0.387 1、0.519 9、0.5353和0.292 3。主要鸭绿沙塘鳢形态性状对体质量的决定系数中,体高最大为0.286 5;两两性状对体质量的决定程度中,体长和体高对体质量的影响最大(0.447 5)。
Twelve morpHometric attributes of 74 Odontobutis yaluensis,including total length（X1）,standard length（X2）,body depth（X3）,caudal peduncle depth（X4）,interorbital diatance（X5）,caudal peduncle length（X6）,head length（X7）,eye diameter（X8）,head depth（X9）,snout length（X10）,head length behind eye（X11） and body weight（Y）,were measured.The correlation index,path coefficients and determination coefficient were calculated based on morphometric attributes by correlation analysis,path analysis and multivariate analysis,respectively.And the morphometric attributes which reach level of significance（P0.05） were used to establish the multiple regression equations.The results show that the coefficient of variation of body weight（55.72%） was higher than that of others.The morphometric attributes which reach level of significance（P0.05） were used to establish the multiple regression equations,which was Y =-46.510-3.810X1＋5.148X2＋16.939X3＋23.829X4.The regression relations reached significant level（P0.05）.And it suggested that the four selected attributes（total length,standard length,body depth,caudal peduncle depth） were practical.And the multiple R,R2 and adjusted R2 were 0.934 5,0.873 3 and 0.866 0,respectively.The correlation coefficients of morphological attributes to body weight were all at extremely significant level（P0.01）.By path analysis,the path coefficients of total length,standard length,body depth and caudal peduncle depth were-0.387 1,0.519 9,0.535 3 and 0.292 3,respectively.The determination coefficients of body depth（0.286 5） were larger than that of total length,standard length and caudal peduncle depth.The determination coefficient of standard length and body depth to body weight was larger than that of others.
出处
《辽东学院学报（自然科学版）》
CAS
2012年第4期237-241,共5页
Journal of Eastern Liaoning University:Natural Science Edition
基金
辽阳市科技计划项目
关键词
鸭绿沙塘鳢
体质量
形态性状
通径分析
Odontobutis yaluensis
body weight
morphometric attribute
path analysis
作者简介
杜华（1965-），女，辽宁辽阳人，工程师，研究方向：淡水鱼类养殖技术。
