Dynamics of a two-prey one-predator model with fear and group defense: A study in parameter planes

Ruma Kumbhakar, Mainul Hossain and Nikhil Pal

Chaos, Solitons & Fractals, 2024, vol. 179, issue C

Abstract: Ecosystems are profoundly affected by the predator–prey relationship. During foraging, prey animals balance food and safety demands, and adopt anti-predator behaviors to increase their survival chances. Many prey animals take steps to reduce their predation risk, including moving to low-risk and less profitable areas, becoming more vigilant, and altering their reproductive strategy. Some prey animals employ the strategy of group defense to reduce their chances of being preyed upon by predators. In the present study, we consider a two-prey one-predator model, where one prey species shows group defense against the predator population while the other does not. We explore the complex dynamics of the system in different parametric planes using isospike and Lyapunov exponent diagrams. We observe several kinds of organized periodic structures, coexistence of different types of attractors, both spike-doubling and spike-bubbling routes to chaos, etc. We also investigate how fear and group defense parameters influence the system’s dynamics and play roles in the survival and extinction of the species.

Keywords: Fear; Group defense; Chaos; Isospike diagram; Periodic windows; Coexisting attractors (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:179:y:2024:i:c:s0960077923013516

DOI: 10.1016/j.chaos.2023.114449

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