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Detecting sexual conflict and sexually antagonistic coevolution

Philosophical Transactions of the Royal Society B: Biological Sciences, ISSN: 0962-8436, Vol: 361, Issue: 1466, Page: 277-285
2006
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Sexual conflict in Gerris gillettei

  Introduction            Sexual conflict (SC) is broadly defined as divergence in the interests of males and females over reproduction (Parker 1979, 2006; Arnqvist and Rowe 2005).

Conference Paper Description

We begin by providing an operational definition of sexual conflict that applies to both inter- and intralocus conflict. Using this definition, we examine a series of simple coevolutionary models to elucidate fruitful approaches for detecting interlocus sexual conflict and resultant sexually antagonistic coevolution. We then use published empirical examples to illustrate the utility of these approaches. Three relevant attributes emerge. First, the dynamics of sexually antagonistic coevolution may obscure the conflict itself. Second, competing models of inter-sexual coevolution may yield similar population patterns near equilibria. Third, a variety of evolutionary forces underlying competing models may be acting simultaneously near equilibria. One main conclusion is that studies of emergent patterns in extant populations (e.g. studies of population and/or female fitness) are unlikely to allow us to distinguish among competing coevolutionary models. Instead, we need more research aimed at identifying the forces of selection acting on shared traits and sexually antagonistic traits. More specifically, we need a greater number of functional studies of female traits as well as studies of the consequences of both male and female traits for female fitness. A mix of selection and manipulative studies on these is likely the most promising route. © 2006 The Royal Society.

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