and one predator with competing prey species. Gilpin (Am. Nat. 113: 306–308, 1979)
explored that for biological feasible parameter values, Vance's model can produce chaotic
dynamics. In the present paper, we consider a modification of Vance's model by
incorporating predator switching into the model for the same set of parameter values
considered by Gilpin. We observe that if we increase switching intensity above a threshold …