| 多元判别在淡水鱼类生态对策判别中的应用 |
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| 引用本文： | 杨严鸥.多元判别在淡水鱼类生态对策判别中的应用[J].湖北农学院学报,1999,19(3):236-240. |
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| 作者姓名： | 杨严鸥 |
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| 作者单位： | 湖北农学院动物科学系 |
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| 摘 要： | 分析生态对策从典型的ｋ－选择类型到典型的ｒ－选择类型的６类共２８种淡水鱼类，用逐步判别法对这些鱼类的７项生态参数变量（渐近体长Ｌ∞，渐近体重ｍ∞，生长系数Ｋ，初次性成熟年龄ｔｍ，最大性成熟年龄ｔｍａｘ，瞬时自然死亡率Ｍ，种群繁殖力系数Ｆｐ）进行挑选。结果表明，在判别鱼类的生态对策类型时，除变量Ｆｐ外，其余６项变量作用显著。根据上述２８种鱼类的６项入选变量，用Ｂａｙｅｓ判别法建立生态对策判别函数估计式，并判定南方大口鲶（长江上游）、翘嘴红鱼白（长江下游）、鲥鱼（长江下游）的生态对策类型分别为“偏向ｋ－选择类型”、“偏向ｒ－选择类型”、“属于ｒ－选择类型”。
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| 关 键 词： | 淡水鱼类 逐步判别法 Bayes判别 生态对策判别 |
Application of Multivariate Discrimination in the Ecological Strategy Analysis of Freshwater Fishes |
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| Yang Yanou.Application of Multivariate Discrimination in the Ecological Strategy Analysis of Freshwater Fishes[J].Journal of Hubei Agricultural College,1999,19(3):236-240. |
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| Authors: | Yang Yanou |
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| Abstract: | Using the progressive discrimination analysis, the ecological strategy for 28 species of freshwater fishes from 6 classifications which were from typical kselection to typical rselection was studied by analysing seven ecological parameters: asymptotic bodylength WTBXL , asymptotic bodyweight t , growth coefficient K, primary reproductive age t m, maximum age t max, instantaneous natural mortality M and population fecundity F p. The conclusion expressed that except for F p the other six ecological parameters were significant in analysing the classifications of ecological strategy. According to the values of six ecological parameters of 28 species of fishes, the ecological strategy discrimination models were established based on Bayes discrimination method. According to the models,it was discriminated that Silurus soldatove meridionalis tended to kselection, Erythrooulter oxycephalus tended to rselection and Macrura reevesii belonged to rselection |
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| Keywords: | freshwater fishes ecological strategy progressive discrimination method Bayes discrimination method kselection rselection |
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