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dc.date.accessioned2018-01-09T15:03:27Z
dc.date.available2018-01-09T15:03:27Z
dc.date.created2016-01-21T20:46:05Z
dc.date.issued2016
dc.identifier.citationOmotoriogun, Taiwo Crossby Albrecht, Tomas Hořak, David Laskemoen, Terje Ottosson, Ulf Rowe, Melissah Sedlacek, Ondrej Lifjeld, Jan Terje . Sperm size evolution in African greenbuls (Passeriformes: Pycnonotidae). Biological Journal of the Linnean Society. 2016, 117(2), 337-349
dc.identifier.urihttp://hdl.handle.net/10852/59557
dc.description.abstractSperm morphology is highly diversified across the animal kingdom and recent comparative evidence from passerine birds suggests that postcopulatory sexual selection is a significant driver of sperm evolution. In the present study, we describe sperm size variation among 20 species of African greenbuls and one bulbul (Passeriformes: Pycnonotidae) and analyze the evolutionary differentiation of sperm size within a phylogenetic framework. We found significant interspecific variation in sperm size; with some genera exhibiting relatively long sperm (e.g. Eurillas) and others exhibiting short sperm head lengths (e.g. Phyllastrephus). However, our results suggest that contemporary levels of sperm competition are unlikely to explain sperm diversification within this clade: the coefficients of inter-male variation (CVbm) in sperm length were generally high, suggesting relatively low and homogeneous rates of extra-pair paternity. Finally, in a comparison of six evolutionary or tree transformation models, we found support for both the Kappa (evolutionary change primarily at nodes) and Lambda (lineage-specific evolutionary rates along branches) models in the evolutionary trajectories of sperm size among species. We therefore conclude that African greenbuls have more variable rates of sperm size evolution than expected from a neutral model of genetic drift. Understanding the evolutionary dynamics of sperm diversification remains a future challenge. The final version of this research has been published in Biological Journal of the Linnean Society. © 2016 Oxford University Pressen_US
dc.languageEN
dc.publisherAcademic Press
dc.titleSperm size evolution in African greenbuls (Passeriformes: Pycnonotidae)en_US
dc.typeJournal articleen_US
dc.creator.authorOmotoriogun, Taiwo Crossby
dc.creator.authorAlbrecht, Tomas
dc.creator.authorHořak, David
dc.creator.authorLaskemoen, Terje
dc.creator.authorOttosson, Ulf
dc.creator.authorRowe, Melissah
dc.creator.authorSedlacek, Ondrej
dc.creator.authorLifjeld, Jan Terje
cristin.unitcode185,28,0,0
cristin.unitnameNaturhistorisk museum
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1
dc.identifier.cristin1319901
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Biological Journal of the Linnean Society&rft.volume=117&rft.spage=337&rft.date=2016
dc.identifier.jtitleBiological Journal of the Linnean Society
dc.identifier.volume117
dc.identifier.issue2
dc.identifier.startpage337
dc.identifier.endpage349
dc.identifier.doihttp://dx.doi.org/10.1111/bij.12663
dc.identifier.urnURN:NBN:no-62252
dc.type.documentTidsskriftartikkelen_US
dc.type.peerreviewedPeer reviewed
dc.source.issn0024-4066
dc.identifier.fulltextFulltext https://www.duo.uio.no/bitstream/handle/10852/59557/2/GREENBUL_PDF.pdf
dc.type.versionAcceptedVersion
dc.relation.projectNFR/179569
dc.relation.projectNFR/196554


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