Stochastic competitive models with pollution and without pollution are proposed and
studied. For the first system with pollution, sufficient criteria for extinction, nonpersistence in …

In this paper, we investigate a single species model in a polluted closed environment with
pulse toxicant input at fixed moment. We show that the population is extinct when the …

The present paper deals with the problem of combined harvesting of two competing fish
species, each of which obeys the law of logistic growth and releases a substance toxic to the …

In this paper a mathematical model is proposed and analysed to study the effect of an
environmental pollutant on two interacting biological species. The interaction between the …

A new single-species model disturbed by both white noise and colored noise in a polluted
environment is developed and analyzed. Sufficient criteria for extinction, stochastic …

This paper reports on the behaviors of single species models with and without pollution. We
consider three basic models, one is deterministic, and others are stochastic. We first …

In this paper, a mathematical model is proposed and analysed to study the simultaneous
effect of industrialization, population and pollution on the depletion of a renewable resource …

In this paper, a mathematical model is proposed and analysed to study the coexistence of
two competing plant species in a finite habitat by assuming that each species produces a …

In this paper, a nonlinear mathematical model to study the effect of a toxicant emitted into the
environment from external sources on two competing biological species is proposed and …

This paper deals with a prey–predator model in which both the species are infected by some
toxicants which are released by some other species or source with fuzzy biological …