Increased copulation duration before ejaculate transfer is associated with larger spermatophores, and male genital titillators, across bushcricket taxa

Journal article


Vahed, Karim, Lehmann, Gerlind, Gilbert, James D. J. and Lehmann, A. W. 2011. Increased copulation duration before ejaculate transfer is associated with larger spermatophores, and male genital titillators, across bushcricket taxa. Journal of Evolutionary Biology. https://doi.org/10.1111/j.1420-9101.2011.02325.x
AuthorsVahed, Karim, Lehmann, Gerlind, Gilbert, James D. J. and Lehmann, A. W.
Abstract

Copulation duration varies considerably across species, but few comparative studies have examined factors that might underlie such variation. We examined the relationship between copulation duration (prior to spermatophore transfer), the complexity of titillators (sclerotized male genital contact structures), spermatophore mass and male body mass across 54 species of bushcricket. Using phylogenetic comparative analyses, we found that copulation duration was much longer in species with titillators than those without, but it was not longer in species with complex compared with simple titillators. A positive relationship was found between spermatophore size and copulation duration prior to ejaculate transfer, which supports the hypothesis that this represents a period of mate assessment. The slope of this relationship was steeper in species with simple rather than complex titillators. Although the data suggest that the presence of titillators is necessary to maintain long copulation prior to ejaculate transfer, mechanisms underlying this association remain unclear.

KeywordsSexual selection; Cryptic female choice; Prolonged copulation
Year2011
JournalJournal of Evolutionary Biology
PublisherWiley Blackwell
ISSN1010061X
Digital Object Identifier (DOI)https://doi.org/10.1111/j.1420-9101.2011.02325.x
Web address (URL)http://hdl.handle.net/10545/584294
hdl:10545/584294
Publication datesSep 2011
Publication process dates
Deposited21 Dec 2015, 11:44
SeriesVol. 9
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ContributorsUniversity of Derby
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