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Evolution of Mixed Reproductive Strategies in Simple Life-History Models

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  • M. Heino

Abstract

Frequency-dependent selection may favor the evolution of mixed reproductive strategies, resulting in polymorphic life-histories within a population. Here I explore the theoretical and ecological possibilities for evolution of mixed reproductive strategies in two minimal age-structured life-history models. The first model addresses evolution of delayed maturity (i.e. competition between annuals and biennials), and the second one deals with evolution of semelparity versus iteroparity. A necessary condition for evolution of polymorphism is that the description of environmental feedback in the model is two-dimensional. A two-dimensional description is necessary if different age-classes experience the influence from the environment differently and have a different influence on the environment. This might be caused by resource utilization or predation risk being different between age-classes.

Suggested Citation

  • M. Heino, 1997. "Evolution of Mixed Reproductive Strategies in Simple Life-History Models," Working Papers ir97063, International Institute for Applied Systems Analysis.
    • Handle: RePEc:wop:iasawp:ir97063
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    1. J.A.J. Metz & S.D. Mylius & O. Diekmann, 1996. "When Does Evolution Optimize? On the Relation Between Types of Density Dependence and Evolutionarily Stable Life History Parameters," Working Papers wp96004, International Institute for Applied Systems Analysis.
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