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Competitive exclusion through reproductive interference

Identifieur interne : 000B68 ( Istex/Corpus ); précédent : 000B67; suivant : 000B69

Competitive exclusion through reproductive interference

Auteurs : Eizi Kuno

Source :

RBID : ISTEX:610FCCBBD80848CEB3C39386A0D1B1A671E2FE33

English descriptors

Abstract

Summary: A simple differential equation model was developed to describe the competitive interaction that may occur between species through reproductive interference. The model has the form comparable to Volterra's competition equations, and the graphical analysis of the outcome of the two-species interaction based on its zero-growth isoclines proved that: (1) The possible outcome in this model, as in usual models of resource competition, is either stable coexistence of both species or gradual exclusion of one species by the other, depending critically upon the values of the activity overlapping coefficientc ij ; (2) but, for the samec ij -values, competitive exclusion is much more ready to occur here than in resource competition; (3) and moreover, the final result of the competition is always dependent on the initial-condition due to its non-linear isoclines, i.e., even under the parameter condition that generally allows both species to coexist, an extreme bias in intial density to one species can readily cause subsequent complete exclusion of its counterparts. Thus, it may follow that the reproductive interference is likely to be working in nature as an efficient mechanism to bring about habitat partitioning in either time or space between some closely related species in insect communities, even though they inhabit heterogeneous habitats where resource competition rarely occurs so that they could otherwise attain steady coexistence.

Url:
DOI: 10.1007/BF02514797

Links to Exploration step

ISTEX:610FCCBBD80848CEB3C39386A0D1B1A671E2FE33

Le document en format XML

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<affiliation>Laboratory of Entomology, College of Agriculture, Kyoto University, 606-01, Kyoto, Japan</affiliation>
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<abstract lang="en">Summary: A simple differential equation model was developed to describe the competitive interaction that may occur between species through reproductive interference. The model has the form comparable to Volterra's competition equations, and the graphical analysis of the outcome of the two-species interaction based on its zero-growth isoclines proved that: (1) The possible outcome in this model, as in usual models of resource competition, is either stable coexistence of both species or gradual exclusion of one species by the other, depending critically upon the values of the activity overlapping coefficientc ij ; (2) but, for the samec ij -values, competitive exclusion is much more ready to occur here than in resource competition; (3) and moreover, the final result of the competition is always dependent on the initial-condition due to its non-linear isoclines, i.e., even under the parameter condition that generally allows both species to coexist, an extreme bias in intial density to one species can readily cause subsequent complete exclusion of its counterparts. Thus, it may follow that the reproductive interference is likely to be working in nature as an efficient mechanism to bring about habitat partitioning in either time or space between some closely related species in insect communities, even though they inhabit heterogeneous habitats where resource competition rarely occurs so that they could otherwise attain steady coexistence.</abstract>
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<genre>Keywords</genre>
<topic>insect community</topic>
<topic>competition</topic>
<topic>differential equation</topic>
<topic>mating interference</topic>
<topic>habitat partitioning</topic>
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<title>Researches on Population Ecology</title>
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<topic>Ecology</topic>
<topic>Evolutionary Biology</topic>
<topic>Forestry</topic>
<topic>Plant Sciences</topic>
<topic>Zoology</topic>
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<identifier type="ISSN">0034-5466</identifier>
<identifier type="eISSN">1437-5613</identifier>
<identifier type="JournalID">10144</identifier>
<identifier type="IssueArticleCount">17</identifier>
<identifier type="VolumeIssueCount">2</identifier>
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<date>1992</date>
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<number>34</number>
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<start>275</start>
<end>284</end>
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<identifier type="DOI">10.1007/BF02514797</identifier>
<identifier type="ArticleID">BF02514797</identifier>
<identifier type="ArticleID">Art7</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Society of Population Ecology, 1992</accessCondition>
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