  In this paper, a stochastic Gilpin-Ayala population model with regime
switching and white noise is considered. All parameters are influenced by
stochastic perturbations. The existence of global positive solution, asymptotic
stability in probability, $p$th moment exponential stability, extinction, weak
persistence, stochastic permanence and stationary distribution of the model are
investigated, which generalize some results in the literatures. Moreover, the
conditions presented for the stochastic permanence and the existence of
stationary distribution improve the previous results.
