Discrete and Continuous Dynamical Systems - Series B (DCDS-B)

Global convergence of a predator-prey model with stage structure and spatio-temporal delay

Pages: 273 - 291, Volume 15, Issue 1, January 2011      doi:10.3934/dcdsb.2011.15.273

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Rui Xu - Institute of Applied Mathematics, Shijiazhuang Mechanical Engineering College, Shijiazhuang 050003, China (email)

Abstract: In this paper, a predator-prey model with stage structure for the predator and a spatio-temporal delay describing the gestation period of the predator under homogeneous Neumann boundary conditions is investigated. By analyzing the corresponding characteristic equations, the local stability of a positive steady state and each of boundary steady states is established. Sufficient conditions are derived for the global attractiveness of the positive steady state and the global stability of the semi-trivial steady state of the proposed problem by using the method of upper-lower solutions and its associated monotone iteration scheme. Numerical simulations are carried out to illustrate the main results.

Keywords:  Spatio-temporal delay, stage structure, global convergence, stability.
Mathematics Subject Classification:  Primary: 35B35, 35K57; Secondary: 92D25.

Received: May 2009;      Revised: February 2010;      Available Online: October 2010.