Stochastic Population Systems.

In this article, we stochastically perturb the classical non-autonomous Lotka-Volterra model [image omitted] into the stochastic differential equation [image omitted] Different from most of existing articles, for example, [3, 20] the system parameters in this article are time-dependent. We will give a sufficient condition under which the stochastic differential equation will have a unique global positive solution. We will then establish some new asymptotic properties for the moments as well as for the sample paths of the solution. In particular, we will discuss two fundamental problems in population systems, namely ultimate boundedness and extinction. [ABSTRACT FROM AUTHOR]