| 講演概要 [PDF] |
In this investigation, we delve into the dynamics of an ecoepidemic model, considering the intertwined influences of fear, refuge seeking behavior, and alternative food sources for predators with selective predation. We extend our model to incorporate the impact of fluctuating environmental noise on system dynamics. Through simulations, we unveil the stabilizing effect of the fear factor on susceptible prey reproduction, juxtaposed against the destabilizing roles of prey refuge behavior and disease prevalence intensity. Notably, when disease prevalence intensity is too low, the infection can be eradicated from the ecosystem. Our deterministic analysis reveals a complex interplay of factors: the system destabilizes initially but then stabilizes as the fear factor suppressing disease prevalence intensifies, or as predators exhibit a stronger preference for infected prey over susceptible ones. Observationally, we note that in system subjected to stochasticity, oscillations tend to cluster around the coexistence equilibrium of the corresponding deterministic model when white noise intensity is low.
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