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dc.contributor.authorEgeland, Torvald Blikra
dc.contributor.authorRudolfsen, Geir
dc.contributor.authorNordeide, Jarle Tryti
dc.contributor.authorFolstad, Ivar
dc.date.accessioned2017-03-14T09:53:27Z
dc.date.available2017-03-14T09:53:27Z
dc.date.issued2016-11-24
dc.description.abstractWhy dominant males experiencing intense sperm competition sometimes show low investments in sperm production is not always obvious. One well-documented example is that of the external fertilizing teleost, the Arctic charr (Salvelinus alpinus), where individuals becoming dominant reduce sperm production and sperm swimming speed in water compared to subordinates. Here, we report how ovarian fluid differentially influences sperm velocity of dominant and subordinate male Arctic charr. That is, sperm from dominant males increase their velocity in water diluted ovarian fluid compared to that observed in water, while sperm from subordinates, on the other hand, decrease velocity in ovarian fluid compared to that observed in water. Thus, subordinates, who invest more resources in their sperm and usually show the highest sperm velocity in water, have lower gains from their investment than dominant males when sperm are swimming in ovarian fluid. In sum, our result suggests that ovarian fluid increase sperm velocity more in dominant males than in subordinate males. Although this finding could partly be caused by cryptic female choice exerted by the ovarian fluid for sperm from dominant males, an alternative and more parsimonious explanation is that sperm from dominant males may simply be better designed for swimming in ovarian fluid compared to sperm from subordinate males. Thus, sperm production in the two reproductive roles seems to be adaptively tailored to different external environments.en_US
dc.descriptionPublished version. Source at <a href=https://doi.org/10.3389/fevo.2016.00135> https://doi.org/10.3389/fevo.2016.00135 </a>en_US
dc.identifier.citationEgeland T, Rudolfsen G, Nordeide JT, Folstad I. Status specific tailoring of sperm behavior in an external fertilizer. Frontiers in Ecology and Evolution. 2016;4(135)en_US
dc.identifier.cristinIDFRIDAID 1400268
dc.identifier.doi10.3389/fevo.2016.00135
dc.identifier.issn2296-701X
dc.identifier.urihttps://hdl.handle.net/10037/10631
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Ecology and Evolution
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectsexual selectionen_US
dc.subjectcryptic female choiceen_US
dc.subjectsperm competitionen_US
dc.subjectsperm selectionen_US
dc.subjectsperm velocityen_US
dc.subjectovarian fluiden_US
dc.titleStatus specific tailoring of sperm behavior in an external fertilizeren_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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