Extra-Pair Parentage: A New Theory Based on Transactions in a Cooperative Game
نویسندگان
چکیده
Question: What is the adaptive significance of extra-pair parentage? Theoretical approach:We view parentage as a ‘transaction currency’ for exchanges of ecological benefits. We develop a multi-player cooperative game, using the core and the Nash bargaining solution as solution concepts. Model assumptions: Birds can negotiate about who pairs with whom. Parentage can be exchanged between individuals as a result of negotiations. Number of offspring fledged from a nest depends on the experience and situation of the social parents and not on their genes (i.e. only direct benefits, no genetic benefits). Predictions: We predict extra-pair parentage to occur when individuals with higher breeding capability are paired to individuals with lower breeding capability. Social interactions between males are predicted to precede the occurrence of extra-pair paternity. We give an example experiment to test our model. Disciplines Behavior and Ethology | Biology | Population Biology | Poultry or Avian Science Comments At the time of publication, author Erol Akçay was affiliated with Stanford University. Currently, he is a faculty member at the Department of Biology at the University of Pennsylvania. This journal article is available at ScholarlyCommons: http://repository.upenn.edu/biology_papers/11 Extra-pair parentage: a new theory based on transactions in a cooperative game Erol Akçay* and Joan Roughgarden Department of Biological Sciences, Stanford University, 371 Serra Mall, Stanford, CA 94305, USA
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