Cyclic prey evolution with cannibalistic predators

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We investigate the evolution of timidity in a prey species whose predator has cannibalistic tendencies. The ecological model is derived from individual level processes, in which the prey seeks refuge after detecting a predator, and the predator cannibalises on the conspecific juveniles. Bifurcation analysis of the model reveals ecological bistability between equilibrium and periodic attractors. Using the framework of adaptive dynamics, we classify ten qualitatively different evolutionary scenarios induced by the ecological bistability. These scenarios include ecological attractor switching through catastrophic bifurcations, which can reverse the direction of evolution. We show that such reversals often result in evolutionary cycling of the level of timidity. In the absence of cannibalism the model never exhibits ecological bistability nor evolutionary cycling. We conclude that cannibalistic predator behaviour can completely change both the ecological dynamics and the evolution of prey.
Original languageEnglish
JournalJournal of Theoretical Biology
ISSN0022-5193
DOIs
Publication statusPublished - 29 Jun 2019
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1181 Ecology, evolutionary biology

Cite this

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title = "Cyclic prey evolution with cannibalistic predators",
abstract = "We investigate the evolution of timidity in a prey species whose predator has cannibalistic tendencies. The ecological model is derived from individual level processes, in which the prey seeks refuge after detecting a predator, and the predator cannibalises on the conspecific juveniles. Bifurcation analysis of the model reveals ecological bistability between equilibrium and periodic attractors. Using the framework of adaptive dynamics, we classify ten qualitatively different evolutionary scenarios induced by the ecological bistability. These scenarios include ecological attractor switching through catastrophic bifurcations, which can reverse the direction of evolution. We show that such reversals often result in evolutionary cycling of the level of timidity. In the absence of cannibalism the model never exhibits ecological bistability nor evolutionary cycling. We conclude that cannibalistic predator behaviour can completely change both the ecological dynamics and the evolution of prey.",
keywords = "1181 Ecology, evolutionary biology",
author = "Lehtinen, {Sami O.} and Geritz, {Stefanus A.H.}",
year = "2019",
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Cyclic prey evolution with cannibalistic predators. / Lehtinen, Sami O.; Geritz, Stefanus A.H.

In: Journal of Theoretical Biology, 29.06.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Cyclic prey evolution with cannibalistic predators

AU - Lehtinen, Sami O.

AU - Geritz, Stefanus A.H.

PY - 2019/6/29

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N2 - We investigate the evolution of timidity in a prey species whose predator has cannibalistic tendencies. The ecological model is derived from individual level processes, in which the prey seeks refuge after detecting a predator, and the predator cannibalises on the conspecific juveniles. Bifurcation analysis of the model reveals ecological bistability between equilibrium and periodic attractors. Using the framework of adaptive dynamics, we classify ten qualitatively different evolutionary scenarios induced by the ecological bistability. These scenarios include ecological attractor switching through catastrophic bifurcations, which can reverse the direction of evolution. We show that such reversals often result in evolutionary cycling of the level of timidity. In the absence of cannibalism the model never exhibits ecological bistability nor evolutionary cycling. We conclude that cannibalistic predator behaviour can completely change both the ecological dynamics and the evolution of prey.

AB - We investigate the evolution of timidity in a prey species whose predator has cannibalistic tendencies. The ecological model is derived from individual level processes, in which the prey seeks refuge after detecting a predator, and the predator cannibalises on the conspecific juveniles. Bifurcation analysis of the model reveals ecological bistability between equilibrium and periodic attractors. Using the framework of adaptive dynamics, we classify ten qualitatively different evolutionary scenarios induced by the ecological bistability. These scenarios include ecological attractor switching through catastrophic bifurcations, which can reverse the direction of evolution. We show that such reversals often result in evolutionary cycling of the level of timidity. In the absence of cannibalism the model never exhibits ecological bistability nor evolutionary cycling. We conclude that cannibalistic predator behaviour can completely change both the ecological dynamics and the evolution of prey.

KW - 1181 Ecology, evolutionary biology

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