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An Analysis of Discrete Stage-Structured Prey and Prey-Predator Population Models

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  • Arild Wikan

Abstract

Discrete stage-structured prey and prey-predator models are considered. Regarding the former, we prove that the models at hand are permanent (i.e., the population will neither go extinct nor exhibit explosive oscillations) and, moreover, that the transfer from stability to nonstationary behaviour always goes through a supercritical Neimark−Sacker bifurcation. The prey model covers species that possess a wide range of different life histories. Predation pressure may both stabilize and destabilize the prey dynamics but the strength of impact is closely related to life history. Indeed, if the prey possesses a precocious semelparous life history and exhibits chaotic oscillations, it is shown that increased predation may stabilize the dynamics and also, in case of large predation pressure, transfer the population to another chaotic regime.

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  • Arild Wikan, 2017. "An Analysis of Discrete Stage-Structured Prey and Prey-Predator Population Models," Discrete Dynamics in Nature and Society, Hindawi, vol. 2017, pages 1-11, April.
    • Handle: RePEc:hin:jnddns:9475854
    DOI: 10.1155/2017/9475854
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    Cited by:

    1. Fu, Shuaiming & Luo, Jianfeng & Zhao, Yi, 2022. "Stability and bifurcations analysis in an ecoepidemic system with prey group defense and two infectious routes," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 194(C), pages 665-690.

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