The evolutionarydynamics of a population model with a strong Allee effect
An evolutionary game theoretic model for a population subject to predationand a strong Allee threshold of extinction is analyzed using, among othermethods, Poincaré-Bendixson theory. The model is a nonlinear, planeautonomous system whose state variables are population density and the meanof a phenot...
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AIMS Press
2015-03-01
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| Series: | Mathematical Biosciences and Engineering |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/mbe.2015.12.643 |
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| author | Jim M. Cushing |
| author_facet | Jim M. Cushing |
| author_sort | Jim M. Cushing |
| collection | DOAJ |
| description | An evolutionary game theoretic model for a population subject to predationand a strong Allee threshold of extinction is analyzed using, among othermethods, Poincaré-Bendixson theory. The model is a nonlinear, planeautonomous system whose state variables are population density and the meanof a phenotypic trait, which is subject to Darwinian evolution, thatdetermines the population's inherent (low density) growth rate (fitness). Atrade-off is assumed in that an increase in the inherent growth rate resultsin a proportional increase in the predator's attack rate. The main resultsare that orbits equilibrate (there are no cycles or cycle chains ofsaddles), that the extinction set (or Allee basin) shrinks when evolutionoccurs, and that the meant trait component of survival equilibria occur atmaxima of the inherent growth rate (as a function of the trait). |
| format | Article |
| id | doaj-art-da1235a1229f4ad1af7a0388bceac5e8 |
| institution | Kabale University |
| issn | 1551-0018 |
| language | English |
| publishDate | 2015-03-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Mathematical Biosciences and Engineering |
| spelling | doaj-art-da1235a1229f4ad1af7a0388bceac5e82025-01-24T02:32:12ZengAIMS PressMathematical Biosciences and Engineering1551-00182015-03-0112464366010.3934/mbe.2015.12.643The evolutionarydynamics of a population model with a strong Allee effectJim M. Cushing0Department of Mathematics, Interdisciplinary Program in Applied Mathematics, 617 N Santa Rita, Tucson, Arizona, 85721An evolutionary game theoretic model for a population subject to predationand a strong Allee threshold of extinction is analyzed using, among othermethods, Poincaré-Bendixson theory. The model is a nonlinear, planeautonomous system whose state variables are population density and the meanof a phenotypic trait, which is subject to Darwinian evolution, thatdetermines the population's inherent (low density) growth rate (fitness). Atrade-off is assumed in that an increase in the inherent growth rate resultsin a proportional increase in the predator's attack rate. The main resultsare that orbits equilibrate (there are no cycles or cycle chains ofsaddles), that the extinction set (or Allee basin) shrinks when evolutionoccurs, and that the meant trait component of survival equilibria occur atmaxima of the inherent growth rate (as a function of the trait).https://www.aimspress.com/article/doi/10.3934/mbe.2015.12.643population dynamicsevolutionevolutionary game theoryallee effectsevolutionarily stable strategy. |
| spellingShingle | Jim M. Cushing The evolutionarydynamics of a population model with a strong Allee effect Mathematical Biosciences and Engineering population dynamics evolution evolutionary game theory allee effects evolutionarily stable strategy. |
| title | The evolutionarydynamics of a population model with a strong Allee effect |
| title_full | The evolutionarydynamics of a population model with a strong Allee effect |
| title_fullStr | The evolutionarydynamics of a population model with a strong Allee effect |
| title_full_unstemmed | The evolutionarydynamics of a population model with a strong Allee effect |
| title_short | The evolutionarydynamics of a population model with a strong Allee effect |
| title_sort | evolutionarydynamics of a population model with a strong allee effect |
| topic | population dynamics evolution evolutionary game theory allee effects evolutionarily stable strategy. |
| url | https://www.aimspress.com/article/doi/10.3934/mbe.2015.12.643 |
| work_keys_str_mv | AT jimmcushing theevolutionarydynamicsofapopulationmodelwithastrongalleeeffect AT jimmcushing evolutionarydynamicsofapopulationmodelwithastrongalleeeffect |