No direct selection to increase offspring number of bet-hedging strategies in large populations: Simons' model revisited |
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Authors: | Kisdi E |
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Affiliation: | Department of Mathematics and Statistics, University of Helsinki, Helsinki, Finland. eva.kisdi@helsinki.fi |
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Abstract: | In mixed or 'bet-hedging' strategies, offspring phenotypes are taken randomly from a distribution determined by the genotype and shaped by evolution. Offspring of a single parent represent a finite sample from this distribution, and therefore are subject to variability because of sampling. Contrary to a recent article by A.M. Simons (2007; J. Evol. Biol.20: 813-817), I show that selection does not favour the production of many offspring just to reduce sampling variability when such mixed strategies are used in large populations. |
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Keywords: | bet hedging mixed strategy offspring number risk spreading size‐number trade‐off stochastic environment |
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