Abstract

ECHEVERRI, Luis F.; GIRALDO, Óscar I.  and  ZARRAZOLA, Edwin. A model of competing species that exhibits zip bifurcation. Integración - UIS [online]. 2017, vol.35, n.1, pp.127-141. ISSN 0120-419X.  https://doi.org/10.18273/revint.v35n1-2017008.

The purpose of this paper is to present a concrete model of competing population species that exhibits a phenomenon called zip bifurcation. The Zip Bifurcation was introduced by Farkas in 1984 for a three dimensional ODE prey-predator system describing a chemostat. We will study a three dimensional system of ordinary differential equations that model the competition of two predators species for one single prey species. The system is based on concrete trigonometric functions modeling the growth rate of the prey and the functional response of the predator. The model exhibits different kinds of behavior and shows examples of the so called “competitive exclusión principle,” and the competition of one “r-strategist” and one “K-strategist.” Additionally, in order to illustrate the zip bifurcation, we will present some numerical simulations for our model.

Keywords : Predator prey model; Zip bifurcation; r-strategist; K-strategist.

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