Abstract
In this paper, we propose and study a stochastic predator-prey model with two competitive preys and one predator in a polluted environment. We first carry out the survival analysis and establish sufficient criteria for the extinction, non-persistence, weak persistence in the mean and strong persistence in the mean. The threshold between weak persistence in the mean and extinction is obtained for each population. Then, we derive sufficient conditions for global attractivity of the studied model. Numerical simulations are carried out to verify the theoretical results.
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