| 太湖银鱼产量变化和主要鱼类间关系的最优回归模型分析 |
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| 引用本文： | 许建新,刘恩生.太湖银鱼产量变化和主要鱼类间关系的最优回归模型分析[J].安徽农业科学,2006,34(6):1098-1100. |
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| 作者姓名： | 许建新 刘恩生 |
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| 作者单位： | 安徽农业大学,安徽,合肥,230036;安徽农业大学,安徽,合肥,230036;中国科学院研究生院,北京,100039 |
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| 基金项目： | 中科院知识创新工程重大项目(KZCX1-SW-12-IV)，国家“863”项目(2002AA60101)和(2002AA601013)联合资助项目 |
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| 摘 要： | 根据太湖1973～2002年的鱼类分类产量统计资料,应用逐步回归分析方法,研究了太湖主要鱼类产量变化对银鱼的影响。结果表明:太湖银鱼和主要鱼类产量间的最优化回归模型为W=225.084 3+1.486 0 W3+0.087 7 W7(W为银鱼产量,W3为鲌鱼产量,W7为其他鱼类产量,n=30,R=0.868 0,P<0.000 1)。通径分析结果表明:鲌鱼对银鱼产量变化影响最大,其次是“其他鱼类,”其通径系数分别为:Py.3=0.890 8,P<0.000 1,Py.7=0.388 7,P=0.000 6。而鲚鱼、鲤鲫鱼、鲢鳙鱼、青草鱼产量变化对银鱼的影响不显著。
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| 关 键 词： | 太湖 银鱼 主要鱼类 产量 多元分析 |
| 文章编号： | 0517-6611（2006）06-1098-03 |
| 收稿时间： | 2005-09-09 |
| 修稿时间： | 2005-09-09 |
Multianalysis between Catches of Ice Fishes and Catches of Main Fishes in Lake Taihu |
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| XU Jian-xin et al.Multianalysis between Catches of Ice Fishes and Catches of Main Fishes in Lake Taihu[J].Journal of Anhui Agricultural Sciences,2006,34(6):1098-1100. |
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| Authors: | XU Jian-xin |
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| Institution: | Anhui Agricultural University, Hefei, Anhui 230036 |
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| Abstract: | Based on the statistics of fish catches from 1973 to 2002 in Lake Taihu,with the methods of stepwise regression analysis and path analysis,the effects of catches of main fishes on the changes of catches of ice fishes in Lake Taihu had been studied.The results showed that: the optimization regression model was W=225.084 3 1.486 0W3 0.0877W7(n=30,R=0.836 4,P<0.000 1),and the results of path analysis were: the catches of topmouth culter have the maximal effects on catches of ice fishes,and the catches of other fishes follow that.The path coefficient respectively was Py.3=0.890 8,P<0.000 1 and Py.7=0.388 7,P=0.000 6. |
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| Keywords: | Lake Taihu Ice fishes Main fishes Catches Multianalysis |
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