Global stability of a delayed predator-prey system with fear and Holling-type II functional response in deterministic and stochastic environments?

作者：Shao, Yuanfu^*

来源：MATHEMATICS AND COMPUTERS IN SIMULATION, 2022, 200: 65-77.

DOI：10.1016/j.matcom.2022.04.013

• Delay
• Fear effect
• Equilibrium state
• Globally asymptotical stability

This paper is concerned with a delayed predator-prey system where besides direct predation, the prey species are affected by fear factor induced from predator species. The globally asymptotical stability of the coexisting equilibrium state in deterministic environment is studied. By perturbing the natural growth rates of prey species and predator species, the deterministic system is then extended to a stochastic version with white noise. We investigate the existence of stochastic positive solution and globally asymptotical stability of the equilibrium state. Our main results demonstrate that the fear and delay are harmless for the global stability of the equilibrium state in some cases, but sufficiently large white noise will destroy the stability. Some numerical examples are given to verify our analytical results.

• 单位
  桂林理工大学