1673-159X

CN 51-1686/N

一类具有恐惧效应时滞与合作狩猎的捕食者−食饵模型研究

Research on a Class of Predator-prey Models with Fear Effect Time Delay and Cooperative Hunting

  • 摘要: 为研究在一定条件下恐惧水平、恐惧效应时滞以及捕食者的合作狩猎程度对模型动力学行为的影响, 在具有恐惧效应的模型中引入恐惧效应时滞与捕食者合作狩猎。本文研究了模型解的非负有界性、平衡点的存在性与稳定性, 讨论了在时滞存在条件下正平衡点处的Hopf分支。研究表明:恐惧水平、恐惧效应时滞以及合作狩猎程度都会对模型的稳定性产生不同程度的影响;较高的恐惧水平与相对较短的恐惧效应时滞更有利于模型的稳定;适度降低合作狩猎程度有助于增强系统的稳定性。

     

    Abstract: To study the influence of fear level, fear effect time lag and the degree of cooperative hunting of predators on the dynamic behavior of the model under certain conditions,fear response delay and predator cooperative hunting were introduced into the model with fear effect. This paper studies the non-negativity and boundedness of the model solutions, the existence and stability of equilibrium points, and discusses the Hopf bifurcation at the positive equilibrium under the condition of time delay. Research shows that the fear effect, fear effect time lag, and cooperative hunting all have varying degrees of influence on the stability of the model. A higher level of fear and a relatively short time lag of the fear effect are more conducive to the stability of the model. Moderately reducing the degree of cooperative hunting can help enhance the stability of the system.

     

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