Abstract
The classical Lotka-Volterra (LV) model is a well-known mathematical model for prey-predator ecosystems. In the present paper, the pulse-type version of stochastic LV model, in which the effect of a random natural environment has been modeled as Poisson white noise, is investigated by using the stochastic averaging method. The averaged generalized Itô stochastic differential equation and Fokker-Planck-Kolmogorov (FPK) equation are derived for prey-predator ecosystem driven by Poisson white noise. Approximate stationary solution for the averaged generalized FPK equation is obtained by using the perturbation method. The effect of prey self-competition parameter ɛ2 s on ecosystem behavior is evaluated. The analytical result is confirmed by corresponding Monte Carlo (MC) simulation.
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The project was supported by the National Natural Science Foundation of China (10932009, 11072212, 11272279, and 11321202).
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Pan, SS., Zhu, WQ. Dynamics of a prey-predator system under Poisson white noise excitation. Acta Mech Sin 30, 739–745 (2014). https://doi.org/10.1007/s10409-014-0069-y
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DOI: https://doi.org/10.1007/s10409-014-0069-y