A History-Dependent Stochastic Predator-Prey Model : Chaos and its Elimination

Details A History-Dependent Stochastic Predator-Prey Model : Chaos and its Elimination A History-Dependent Stochastic Predator-Prey Model : Chaos and its Elimination

1999-08-05

arxiv.org/abs/cond-mat/9908079v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 Pages (Latex File), 16 Figures (JPEG Files), To appear in Eur. Phys. J. B

Scientific paper

10.1007/s100510050074

A non-Markovian stochastic predator-prey model is introduced in which the prey are immobile plants and predators are diffusing herbivors. The model is studied by both mean-field approximation (MFA)and computer simulations. The MFA results a series of bifurcations in the phase space of mean predator and prey densities, leading to a chaotic phase. Because of emerging correlations between the two species distributions, the interaction rate alters and if it is set the value which is obtained from the simulation, then the chaotic phase disappears.

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