摘要
基于种群Lotka-Volterra捕食-食饵模型增长的假设,构建了一个带有食饵收获项的Lotka-Volterra模型.首先探讨了该模型平衡点的存在性和稳定性,然后讨论了一个正平衡点附近产生的Hopf分支,最后通过数值模拟验证了理论分析结果.
Based on the assumption of Lotka-Volterra predator-prey model,a Lotka-Volterra model with prey harvesting is constructed in this paper.First,the existence and stability of the equilibrium points of the model are discussed,and then the Hopf bifurcation generated near a positive equilibrium point is discussed.Finally,the numerical simulation is given to verify the theoretical analysis.
引文
[1] VOLTERRA V.Variazione fluttuazini del numero d’individui in speice animali conviventi[J].Mem R Accad Naz dei Lincei,1926,2:31.
[2] 陈兰荪,孟新柱,焦建军.生物动力学[M].北京:科学出版社,2009.
[3] 张锦炎,冯贝叶.常微分方程几何理论与分支问题[M].北京:北京大学出版社,2000.
[4] 徐为坚.具有种群Logistic增长及饱和传染率的SIS模型的稳定性和Hopf分支[J].数学物理学报,2008,28A(3):578.
[5] 梁肇军,陈兰荪.食饵种群具有常数收获率的二维Volterra模型的定性分析[J].生物数学学报,1986(1):22.
[6] YUAN Rui,JIANG Wei-hua,WANG Yong.Saddle-node-Hopf bifurcation in a modified Leslie-Gower predator-prey model with time-delay and prey harvesting[J].Journal of Mathmatical Analysis and Applications,2015,422:1072.
[7] STEPHEN W.Introduction to Applied Nonlinear Dynamical Systems and Chaos[M].New York:Springer,1990.