Abstract
Stochastic predator–prey systems with different functional responses have been studied. But the dynamics of a Michaelis–Menten-type ratio-dependent predator–prey system with stochastic perturbation is not investigated systematically. In this paper, we give the asymptotic behavior of this system. Sufficient criteria for the existence of a stationary distribution and ergodicity are obtained, which means the species are permanent. Besides, we show the situations in which the species are non-persistence. Finally, examples and simulations are carried on to verify these results.
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