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Can too strong female choice deteriorate male ornamentation?

Morrell, LJ; Kokko, H

Authors

H Kokko



Abstract

Competition for limited resources can have fundamental implications for population dynamics. However, the effects of resource depletion have rarely been discussed in the context of sexual selection, even though mate choice typically favours males who outperform others in securing access to some limited resource. Here, we develop a model to investigate the question of resource competition as a form of male-male competition in the context of male sexual displays. We phrase our model in terms of male bowerbirds either searching for or stealing resources (ornamental objects) valued by females, and compare the model findings with published studies of time allocation to various activities in different species of bowerbirds. The basic idea of the model, however, extends to cases where the resource is used less directly for the development of sexual ornamentation, such as males excluding others' access to food. We show that if males compete for resources used in sexual displays, intense female preference for high-quality displays can lead to poorer prospects for efficient choice by females. This is because males benefit from excluding others' access to resources used in displays, damaging the overall efficiency of resource use in the population, and the accuracy with which females can judge male ability to gain such resources. The evolution of female choice may therefore have a self-limiting nature when it poses a selection pressure on male resource acquisition.

Journal Article Type Article
Publication Date Aug 7, 2004
Journal Proceedings of the Royal Society B. Biological Sciences
Print ISSN 0962-8452
Electronic ISSN 1471-2970
Publisher Royal Society, The
Peer Reviewed Peer Reviewed
Volume 271
Issue 1548
Pages 1597-1604
APA6 Citation Morrell, L., & Kokko, H. (2004). Can too strong female choice deteriorate male ornamentation?. Proceedings of the Royal Society B: Biological Sciences, 271(1548), 1597-1604. https://doi.org/10.1098/rspb.2004.2763
DOI https://doi.org/10.1098/rspb.2004.2763
Keywords General Biochemistry, Genetics and Molecular Biology; General Immunology and Microbiology; General Agricultural and Biological Sciences; General Environmental Science; General Medicine
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