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Experimental evolution of sperm competitiveness in a mammal
Authors:Renée C Firman and Leigh W Simmons
Institution:(1) Centre for Evolutionary Biology (M092), University of Western Australia, 35 Stirling Hwy, 6009 Nedlands, Australia
Abstract:

Background  

When females mate with multiple partners, sperm from rival males compete to fertilise the ova. Studies of experimental evolution have proven the selective action of sperm competition on male reproductive traits. However, while reproductive traits may evolve in response to sperm competition, this does not necessarily provide evidence that sperm competitive ability responds to selection. Indeed, a study of Drosophila failed to observe divergence in sperm competitive ability of males in lines selected for enhanced sperm offence and defence.
Keywords:
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