0432337 - BC 2015 RIV US eng J - Journal Article
Xu, F. - Cressman, R. - Křivan, Vlastimil
Evolution of mobility in predator-prey systems.
Discrete and Continuous Dynamical Systems-Series B. Roč. 19, č. 10 (2014), s. 3397-3432. ISSN 1531-3492. E-ISSN 1553-524X
Institutional support: RVO:60077344
Keywords : predator-prey systems
Subject RIV: EH - Ecology, Behaviour
Impact factor: 0.768, year: 2014

We investigate the dynamics of a predator-prey system with the assumption that both prey and predators use game theory-based strategies to maximize their per capita population growth rates. The predators adjust their strategies in order to catch more prey per unit time, while the prey, on the other hand, adjust their reactions to minimize the chances of being caught. We assume each individual is either mobile or sessile and investigate the evolution of mobility for each species in the predator-prey system. When the underlying population dynamics is of the Lotka-Volterra type, we show that strategies evolve to the equilibrium predicted by evolutionary game theory and that population sizes approach their corresponding stable equilibrium (i.e. strategy and population effects can be analyzed separately). This is no longer the case when population dynamics is based on the Holling II functional response, although the strategic analysis still provides a valuable intuition into the long term outcome. Numerical simulation results indicate that, for some parameter values, the system has chaotic behavior. Our investigation reveals the relationship between the game theory-based reactions of prey and predators, and their population changes.
Permanent Link: http://hdl.handle.net/11104/0240003