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Dynamics of a Leslie-Gower predator-prey model with additive Allee effect

机译:具有加性Allee效应的Leslie-Gower捕食者-食饵模型的动力学

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摘要

In this paper, we investigate the complex dynamics of a Leslie-Gower predation model with additive Allee effect on prey. Without Allee effect, the model has a unique globally asymptotically stable equilibrium point under some conditions. With Allee effect on prey, the model has none, one or two positive equilibria. Moreover, we prove the existence of parameter subsets for which the model can have Hopf bifurcation. And we find that when the model exhibits two positive equilibria there is a separatrix curve that separates the behavior of trajectories of the system, implying that the model is highly sensitive to the initial conditions. One of the most interesting findings is that Allee effect can increase the risk of ecological extinction.
机译:在本文中,我们研究了具有加性Allee效应的Leslie-Gower捕食模型的复杂动力学。在没有Allee效应的情况下,该模型在某些条件下具有唯一的全局渐近稳定平衡点。受到Allee对猎物的影响,该模型没有,只有一个或两个正平衡。此外,我们证明了模型可以具有Hopf分支的参数子集的存在。我们发现,当模型表现出两个正平衡时,会有一条分离曲线,将系统的轨迹行为分开,这表明该模型对初始条件高度敏感。最有趣的发现之一是Allee效应会增加生态灭绝的风险。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2015年第7期|2092-2106|共15页
  • 作者单位

    College of Mathematics and Information Science, Wenzhou University, Wenzhou 325035, PR China ,School of Mathematics and Computational Science, Sun Yat-sen University, Guangzhou 510275, PR China;

    College of Mathematics and Information Science, Wenzhou University, Wenzhou 325035, PR China;

    College of Mathematics and Information Science, Wenzhou University, Wenzhou 325035, PR China;

    Department of Mathematics, Harbin Normal University, Harbin 150001, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Predator-prey model; Additive Allee effect; Leslie-Gower; Bistability;

    机译:捕食者-猎物模型;加性Allee效应;莱斯利·高尔双稳态;

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