东北七鳃鳗和日本七鳃鳗成体形态性状对体质量的影响分析  

Mathematical analysis of effects of morphometric attribute on body weight of Lampetra morii and Lampetra japonica

作　　者：李军[1,2,3] 董彦娇 韩英伦 刘欣[1,2] 宋涛[1,2] 徐磊[1,2] 逄越[1,2] 李庆伟[1,2] 

机构地区：[1]辽宁师范大学生命科学学院,辽宁大连116081 [2]辽宁师范大学七鳃鳗研究中心,辽宁大连116081 [3]辽宁省淡水水产科学研究院辽宁省水生动物病害防治重点实验室,辽宁辽阳111000

出　　处：《海洋学报》2017年第4期61-71,共11页

基　　金：国家重点基础研究发展规划(973计划)(2013CB835304);全国海洋公益项目(201305016);大连市科技计划(2013E11SF056)

摘　　要：为研究东北七鳃鳗和日本七鳃鳗形态性状对体质量的影响,测量314尾东北七鳃鳗和302尾日本七鳃鳗成体的体质量(Y)和全长(X_1)、躯干长(X_2)、尾长(X_3)、头长(X_4)、吻长(X_5)、眼径(X_6)、背鳍前长(X_7)、眼后头长(X_8)8个形态性状,运用相关分析、通径分析和回归分析方法,确定影响体质量的主要形态性状,建立体质量和形态性状的多元回归方程。分析结果显示:东北七鳃鳗和日本七鳃鳗体质量服从正态分布,体质量的变异系数最大,全长、躯干长、尾长、头长、吻长、眼径、背鳍前长和眼后头长8个形态性状均与体质量呈正相关(P<0.01)。经偏回归系数检验,东北七鳃鳗全长、头长、眼径和眼后头长呈显著性水平(P<0.05),其通径系数分别为0.636、0.202、0.060和0.105;日本七鳃鳗全长、吻长和眼后头长呈极显著性水平(P<0.01),其通径系数分别为0.730、0.098和0.153。单个性状对体质量的决定系数中,东北七鳃鳗和日本七鳃鳗全长对体质量的决定系数最大。东北七鳃鳗和日本七鳃鳗形态性状的单独决定系数和两个共同决定系数的总和分别为0.855和0.857。建立以东北七鳃鳗全长、头长、眼径和眼后头长4个形态性状为自变量,体质量为因变量的多元回归方程:Y=1.502X_1+2.699X_4+8.554X_6+1.915X_8-41.547;日本七鳃鳗全长、吻长和眼后头长3个形态性状为自变量,体质量为因变量的多元回归方程:Y=4.895X_1+9.688X_5+6.973 X_8-157.460。东北七鳃鳗和日本七鳃鳗成体形态性状对体质量的分析为七鳃鳗优良亲本的人工选育以及其形态学研究提供参考依据。To study the relationship between body weight and morphological attributes of Lampetra morii and Lampetra japonica,314 L.morii and 302 L.japonica were selected to measure 8morphometric attributes including total length（X_1）,trunk length（X_2）,tail length（X_3）,head length（X_4）,snout length（X_5）,eye length（X_6）,length before the first dorsal fin（X_7）,head length behind eye（X_8）and body weight（Y）,respectively.The correlation index,path coefficients and determination coefficient are calculated with correlation analysis,path analysis and multivariate analysis,respectively.The multiple regression equations are established with morphometric attributes for the body weight reaching level of significance（P〈0.05）and the body weight.The results show that the coefficient of variation of Y of L.morii and L.japonica were the highest value than that of variation of morphological attributes,respectively.And the distribution of body weight of L.morii and L.japonicaobeyed normal distribution,respectively.The correlation coefficients between morphological attributes and body weight of L.morii and L.japonica were all at extremely significant level（P〈0.01）,respectively.Partial regression coefficient of X_1,X_4,X_6 and X_8for body weight of L.morii were significant（P〈0.05）and partial regression coefficient of X_1,X_5 and X_8for body weight of L.japonicareached extremely significant level（P〈0.01）.And the path coefficients of X_1,X_4,X_6 and X_8of L.morii were 0.636、0.202、0.060 and 0.105 and the path coefficients of X_1,X_5 and X_8of L.japonica were 0.730、0.098 and 0.153.The determination coefficients of X_1 for the body weight of L.morii and L.japonica were larger than that of other morphometric attributes,respecively.The high value of correlation index between morphometric attributes and body weight of L.morii and L.japonicai were 0.855（r2）and 0.857（r2）,respectively.The multiple regression equations of L.morii and L.japonica were Y=1.502X_1＋2.699X_4＋8.554X_6�

关 键 词：东北七鳃鳗 日本七鳃鳗 通径分析 回归分析 多元回归方程 

分 类 号：S917.4[农业科学—水产科学]