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Learning in a game context: strategy choice by some keeps learning from evolving in others.

Dubois, Frédérique; Morand-Ferron, Julie; Giraldeau, Luc-Alain (2010). Learning in a game context: strategy choice by some keeps learning from evolving in others. Proceedings of the Royal Society B: Biological Sciences , vol. 277 , nº 1700. p. 3609-3616. DOI: 10.1098/rspb.2010.0857.

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Résumé

Behavioural decisions in a social context commonly have frequency-dependent outcomes and so require analysis using evolutionary game theory. Learning provides a mechanism for tracking changing conditions and it has frequently been predicted to supplant fixed behaviour in shifting environments; yet few studies have examined the evolution of learning specifically in a game-theoretic context. We present a model that examines the evolution of learning in a frequency-dependent context created by a producer-scrounger game, where producers search for their own resources and scroungers usurp the discoveries of producers. We ask whether a learning mutant that can optimize its use of producer and scrounger to local conditions can invade a population of non-learning individuals that play producer and scrounger with fixed probabilities. We find that learning provides an initial advantage but never evolves to fixation. Once a stable equilibrium is attained, the population is always made up of a majority of fixed players and a minority of learning individuals. This result is robust to variation in the initial proportion of fixed individuals, the rate of within- and between-generation environmental change, and population size. Such learning polymorphisms will manifest themselves in a wide range of contexts, providing an important element leading to behavioural syndromes.

Type de document: Article
Mots-clés libres: behavioural syndrome; frequency dependence; learning; personality; polymorphism; producer-scrounger game
Centre: Institut national de la recherche scientifique
Date de dépôt: 02 mai 2018 18:34
Dernière modification: 02 mai 2018 18:34
URI: http://espace.inrs.ca/id/eprint/7004

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