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dc.contributor.advisorCushing, J. M.en_US
dc.contributor.authorEdmunds, Jeffrey
dc.creatorEdmunds, Jeffreyen_US
dc.date.accessioned2013-05-09T10:49:52Z
dc.date.available2013-05-09T10:49:52Z
dc.date.issued2001en_US
dc.identifier.urihttp://hdl.handle.net/10150/289978
dc.description.abstractThe purpose of this dissertation is to develop and study a competition model which, being capable of a wide range of population dynamics, will exhibit phenomena in multi-species interactions not seen in simpler models. We consider a structured, non-linear model of two competing species, each having three life stages. This model is based on a single-species model that has been used to demonstrate many interesting effects in population dynamics and, in particular, has been highly successful in describing and predicting the dynamics of insect populations in controlled laboratory experiments, A thorough examination of equilibria provides necessary and sufficient conditions for stability of axis equilibria, which corresponds to the extinction of one species. Applying the concept of persistence to the model, we obtain sufficient conditions under which the model is persistent with respect to the extinction states, implying indefinite coexistence of both species. Finally, we give specific examples in which the model contradicts classical (equilibrium) competition theory by showing non-equilibrium coexistence in the presence of unstable positive equilibria, stable axis equilibria, and high levels of inter-specific competition.
dc.language.isoen_USen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectMathematics.en_US
dc.titleA study of a stage-structured model of two competing speciesen_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.leveldoctoralen_US
dc.identifier.proquest3010255en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMathematicsen_US
thesis.degree.namePh.D.en_US
dc.identifier.bibrecord.b41711609en_US
refterms.dateFOA2018-07-18T01:14:15Z
html.description.abstractThe purpose of this dissertation is to develop and study a competition model which, being capable of a wide range of population dynamics, will exhibit phenomena in multi-species interactions not seen in simpler models. We consider a structured, non-linear model of two competing species, each having three life stages. This model is based on a single-species model that has been used to demonstrate many interesting effects in population dynamics and, in particular, has been highly successful in describing and predicting the dynamics of insect populations in controlled laboratory experiments, A thorough examination of equilibria provides necessary and sufficient conditions for stability of axis equilibria, which corresponds to the extinction of one species. Applying the concept of persistence to the model, we obtain sufficient conditions under which the model is persistent with respect to the extinction states, implying indefinite coexistence of both species. Finally, we give specific examples in which the model contradicts classical (equilibrium) competition theory by showing non-equilibrium coexistence in the presence of unstable positive equilibria, stable axis equilibria, and high levels of inter-specific competition.


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