Evolution of mixed maturation strategies in semelparous life histories: The crucial role of dimensionality of feedback environment

Heino, M. ORCID: https://orcid.org/0000-0003-2928-3940, Metz, J.A.J., & Kaitala, V. (1997). Evolution of mixed maturation strategies in semelparous life histories: The crucial role of dimensionality of feedback environment. Philosophical Transactions of the Royal Society B: Biological Sciences 352 (1356) 1647-1655. 10.1098/rstb.1997.0146.

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Abstract

We study the evolution of age at maturity in a semelparous life history with two age classes. An individual may either breed in the first year of its life and die, or delay breeding to the second year. In this setting a mixed strategy means that a fraction of the individual's offspring breed in the first possible breeding event, while the remaining fraction delay breeding. Current theory seems to imply that mixed strategies are not evolutionarily stable strategies (ESSs) under a steady-state population dynamical regime. We show that a two-dimensional feedback environment may allow the evolution of mixed age at maturity. Furthermore, different phenotypes need to perceive the environment differently. The biological reasoning behind these conditions is different resource usage or predation pressure between two age classes. Thus, the conventional explanations for the occurrence of mixed strategies in natural populations, environmental stochasticity or complex dynamics, are not needed.

Item Type:	Article
Research Programs:	Adaptive Dynamics Network (ADN)
Bibliographic Reference:	Philosophical Transactions of the Royal Society B: Biological Sciences; 352(1356):1647-1655 (29 November 1997)
Depositing User:	IIASA Import
Date Deposited:	15 Jan 2016 02:08
Last Modified:	27 Aug 2021 17:15
URI:	https://pure.iiasa.ac.at/5112

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