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Maintenance of Sperm Variation in a Highly Promiscuous Wild Bird

Calhim, Sara; Double, Michael; Margraf, Nicolas; Birkhead, Tim R; Cockburn, Andrew


Postcopulatory sexual selection is an important force in the evolution of reproductive traits, including sperm morphology. In birds, sperm morphology is known to be highly heritable and largely condition-independent. Theory predicts, and recent comparative work corroborates, that strong selection in such traits reduces intraspecific phenotypic variation. Here we show that some variation can be maintained despite extreme promiscuity, as a result of opposing, copulation-role-specific selection...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: PLOS ONE (Public Library of Science)
DOI: 10.1371/journal.pone.0028809
Access Rights: Open Access


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