Analysis of stochastic attractors for time-delayed quadratic discrete model of population dynamics

Abstract

We consider a time-delayed quadratic discrete model of population dynamics under the influence of random perturbations. Analysis of stochastic attractors of the model is performed using the methods of direct numerical simulation and the stochastic sensitivity function technique. A deformation of the probability distribution of random states around the stable equilibria and cycles is studied parametrically. The phenomenon of noise-induced transitions in the zone of discrete cycles is demonstrated.

Keywords

• a time-delayed quadratic discrete model of population dynamics
• stochastic sensitivity function