Document Type

Journal Article

Date of this Version

2007

Publication Source

Evolutionary Ecology Research

Volume

9

Issue

8

Start Page

1223

Last Page

1243

Abstract

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.

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.

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Date Posted: 02 October 2015

This document has been peer reviewed.