| 4月龄史氏鲟表型性状与体重之间的关系 |
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| 引用本文： | 周洲,杨兴,蒋晓红,张龙涛,刘霆.4月龄史氏鲟表型性状与体重之间的关系[J].江西农业学报,2014(8):84-87. |
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| 作者姓名： | 周洲 杨兴 蒋晓红 张龙涛 刘霆 |
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| 作者单位： | 贵州省水产研究所,贵州贵阳550025 |
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| 基金项目： | 贵州省渔业资源利用研发创新团队建设项目（黔科合院所创能（2011）4004）;贵州省科学技术基金“西伯利亚鲟气单胞菌陛疾病模型的构建及药代动力学研究”（黔科合J字[2013]2190号）;贵州省农业科技攻关项目“贵州山区鲟鱼人工繁殖技术研究及示范”（黔科合NY[2013]3066号）;贵州省现代农业产业技术体系“贵州省特色水产产业疾病防控功能实验室”（GZCYTX2013-01102）. |
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| 摘 要： | 随机选取4月史氏鲟幼鱼380尾,测量其体重、全长、体长、体厚、体高、头长、吻长、尾长、尾柄高、眼径、眼后头长共11个形态学指标。采用相关分析和通径分析方法,研究了史氏鲟4月龄幼鱼外部形态对体重的相关系数、通径系数及决定系数,明确了影响史氏鲟4月幼鱼体重的主要外部形态性状。结果表明,各形态性状与体重的相关系数均达到极显著水平(P<0.01);影响史氏鲟4月幼鱼体重的主要性状是全长、体高、眼径、尾柄高;全长对体重的通径系数最大(0.395**),对体重的决定系数最高(15.60%);眼径对体重的直接作用较小(0.160**),主要是通过间接作用来影响体重(0.4152);决定分析的结果和通径分析的变化趋势一致;各形态性状对体重总的决定系数Σd=0.882,它与相关指数R2的数值相等;通过逐步回归分析方法,经偏回归系数显著性检验,建立了体质量为因变量,全长、体高、尾柄高和眼径为自变量的多元回归方程为:y=-92.751+3.018x1+12.472x2+50.765x3+35.335x4。
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| 关 键 词： | 史氏鲟 外部形态 体重 相关分析 多元回归方程 |
Relation between Phenotypic Characters and Body Weight of 4-month-old Amur Sturgeon（Acipenser schrenckii） |
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| ZHOU Zhou,YANG Xing,JIANG Xiao- hong,ZHANG Long -tao,LIU Ting.Relation between Phenotypic Characters and Body Weight of 4-month-old Amur Sturgeon（Acipenser schrenckii）[J].Acta Agriculturae Jiangxi,2014(8):84-87. |
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| Authors: | ZHOU Zhou YANG Xing JIANG Xiao- hong ZHANG Long -tao LIU Ting |
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| Institution: | (Guizhou Institute of Aquatic Products, Guiyang 550025, Ghina) |
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| Abstract: | Total 380 4-month-old amur sturgeon（ Acipenser schrenckii）were randomly sampled,and their 11 phenotypic characters（ including full length,body length,head length,snout length,length of head behind the eye,tail handle height,tail length,eye diameter,body thickness,body weight,body height）were measured. By correlation analysis and path analysis,the au-thor studied the correlation coefficient,path coefficient and determination coefficient between body weight and 11 phenotypic charac-ters of amur sturgeon,and explicated the main phenotypic characters affecting the body weight of 4 -month-old amur sturgeon. The results showed that all correlation coefficients between body weight and each morphological character reached a very significant level（P﹤0. 01）. The main phenotypic characters which affected the body weight of 4-month-old amur sturgeon were full length, body height,tail handle height and eye diameter. Both the path coefficient and determination coefficient between full length and body weight were the highest,being 0. 395＊＊ and 15. 60% respectively. Eye diameter exhibited a slight direct effect（0. 160＊＊） and a significant indirect effect（0. 4152）on the body weight. The results of determination coefficient analysis were similar to those of path analysis. The total determination coefficient between all phenotypic characters and body weight was 0. 882,which was equal to the value of correlation index R2 . Through stepwise regression analysis and significance test for partial regression coefficients,the multiple regression equation describing the relation between body weight（ y）and full length（ x1 ）,body height（ x2 ）,eye diameter （x3）,tail handle height（x4）of amur sturgeon was built as follows：y= -92.751＋3.018x1 ＋12.472x2 ＋50.765x3 ＋35.335x4. |
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| Keywords: | Aclpenser schrenckii Phenotypic character Body weight Correlation analysis Multiple regression equation |
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