关键词: Eco-epidemiological model, Delay, Stability, Hopf bifurcation

Abstract:  In this paper, an eco-epidemiological model with time delay is studied. The
local stability of the four equilibria, the existence of stability switches about the predation-
free equilibrium and the coexistence equilibrium are discussed. It is found that Hopf
bifurcations occur when the delay passes through some critical values. Formulae are
obtained to determine the direction of bifurcations and the stability of bifurcating periodic
solutions by using the normal form theory and center manifold theorem. Some numerical
simulations are carried out to illustrate the theoretical results.

Key words: Eco-epidemiological model, Delay, Stability, Hopf bifurcation