Evolution of dispersal by memory and learning in integrodifference equation models

Abstract

AbstractIn this paper, we develop an integrodifference equation model that incorporates spatial memory and learning so that each year, a fraction of the population use the same dispersal kernel as the previous year, and the remaining individuals return to where they bred or were born. In temporally static environments, the equilibrium of the system corresponds to an ideal free dispersal strategy, which is evolutionarily stable. We prove local stability of this equilibrium in a special case, and we observe convergence towards this equilibrium in numerical computations. When there are periodic or stochastic temporal changes in the environment, the population is less able to match the environment, but is able to do so to some extent depending on the parameters. Overall, the mechanism proposed in this model shows a possible way for the dispersal kernel of a population to evolve towards an ideal free dispersal kernel.KEYWORDS: Integrodifference equationmathematical biologyevolution of dispersalideal free distributionspatial memorymigrationMSC: 37N2592-1092D 40 AcknowledgementWe thank the reviewers for their feedback and suggestions, which helped improve the paper.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingR. S. Cantrell and C. Cosner received support from NSF Grant DMS-18-53478.