Three-Prey Switching Behavior of Two Generalist Predators with Asymmetric Intraguild Predation: A Coyote-Fox-Two Rodents System

27 Pages Posted: 2 Dec 2023

See all articles by Ségolène Lireux

Ségolène Lireux

affiliation not provided to SSRN

Ezio Venturino

affiliation not provided to SSRN

Francis Raoul

affiliation not provided to SSRN

Antoine Perasso

University of Besançon - Université de Franche-Comté

Abstract

Living species interact with each other in complex food webs, mostly via predation, a phenomenon that  prompted many modeling research studies. Previous work has addressed one predator and multi-prey systems. Especially, plasticity of the predator's feeding behavior in the presence of several prey, called switching, has been taken into account in some models. The present work focuses on the extension of these latter models incorporating several predators. For this purpose, we incorporate intraguild predation (a prey and a predator sharing the same prey), a well-known multi-predator effect. This model work is emphasized by a concrete application on a system in North America composed of coyote as top predator and red fox as intermediate predator and two rodent species, meadow vole and deer mouse, as prey. Both predators are generalist opportunistic. The proposed model is described by ordinary differential equations and multi-prey Holling type III functional responses. We explore the dynamics of this system in three ecological contexts marked by different densities of the species: rural, rural during outbreaks of voles (this species is known to peak and cycle regularly) and finally in urban areas.  In the latter situation food resources for predators alternative to rodents are more abundant compared to rural areas. In the different studied contexts, the simulations showed a convergence to the coexistence of all the species in the long time. The interesting phenomenon of 3-prey switching is observed.

Keywords: intraguild predation, tri-trophic food web, multi-predator, multi-prey, switching, Holling III

Suggested Citation

Lireux, Ségolène and Venturino, Ezio and Raoul, Francis and Perasso, Antoine, Three-Prey Switching Behavior of Two Generalist Predators with Asymmetric Intraguild Predation: A Coyote-Fox-Two Rodents System. Available at SSRN: https://ssrn.com/abstract=4651514 or http://dx.doi.org/10.2139/ssrn.4651514

Ségolène Lireux (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

Ezio Venturino

affiliation not provided to SSRN ( email )

No Address Available

Francis Raoul

affiliation not provided to SSRN ( email )

No Address Available

Antoine Perasso

University of Besançon - Université de Franche-Comté ( email )

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