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Evolution of the maturation rate collapses competitive coexistence

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Title: Evolution of the maturation rate collapses competitive coexistence
Authors: Mougi, Akihiko Browse this author
Nishimura, Kinya Browse this author
Keywords: Competition
Life history traits
Maturation rate
Adaptive dynamics
Issue Date: 7-Aug-2006
Publisher: Elsevier Ltd
Journal Title: Journal of Theoretical Biology
Volume: 241
Issue: 3
Start Page: 467
End Page: 476
Publisher DOI: 10.1016/j.jtbi.2005.12.017
PMID: 16458325
Abstract: Most theoretical studies on character displacement and the coexistence of competing species have focused attention on the evolution of competitive traits driven by inter-specific competition. We investigated the evolution of the maturation rate which is not directly related to competition and trades off with the birth rate and how it influences competitive outcomes. Evolution may result in the superior competitor becoming extinct if, initially, the inferior competitor has a lower, and the superior one a higher, maturation rate at the coexistence equilibrium. This counterintuitive result is explained by an explosive increase in the adult population of the inferior competitor as a result of the more rapid evolution of its maturation rate, which is caused by differences in the intensity and direction of selection on the maturation rates of the two species and in their adult densities, which are related to differences in their life histories. Thus, a life history trait trade-off with a competitive trait may cause a competitive ecological coexistence to collapse.
Type: article (author version)
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 西村 欣也

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