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Incorporating Phenotype Plasticity into the Indirect Evolutionary Approach

Schmitt, Rebecca (2015): Incorporating Phenotype Plasticity into the Indirect Evolutionary Approach.


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Up to now, the Indirect Evolutionary Approach (IEA) has been based on phenotypes which are represented by unchangeable preference parameters and, as a consequence, by time-invariant utility functions. Here we introduce phenotype plasticity into the IEA by providing a model which includes changeable individual preference parameters. We show that such phenotype plasticity can be a stable phenomenon in a stable environment. For 2x2 symmetric evolutionary games, we identify conditions under which a population of non-plastic phenotypes can be invaded by mutants of a plastic phenotype, but not by mutants of a non-plastic phenotype.

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