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dc.contributor.authorRudolfsen, Geir
dc.contributor.authorVaz, Jonathan Serrano
dc.contributor.authorFolstad, Ivar
dc.date.accessioned2016-02-23T13:11:22Z
dc.date.available2016-02-23T13:11:22Z
dc.date.issued2015-08-03
dc.description.abstractSeminal fluids are known to have a variety of effects on rival sperm, but in externally fertilizing species it is still unclear what effects seminal fluid can induce under sperm competition. We recorded sperm activity from natural ejaculates (including own seminal fluid) of an external fertilizer, the Arctic charr (Salvelinus alpinus), after activation either in water (the natural medium for milt dilution), in a dilution of water and own seminal fluid or in a dilution of water and seminal fluid of a foreign male. When activation occurred in own or foreign dilutions of seminal fluids, sperm maintained higher velocities than when activated in water only. Yet, velocity did not differ depending on whether sperm was activated in own or foreign seminal fluid solutions. More important, approximately 25% fewer sperm cells were initially activated in own seminal fluid than in foreign seminal fluid or water, indicating that activation is under close control of own seminal fluid only. Our results document that the presence of foreign seminal fluid under sperm competition do not have apparent effect on sperm velocity. Yet, the large inhibitory effect on initial activation of sperm cells seen in own, but not in foreign dilutions of seminal fluids (and water) suggests an individual specific recognition mechanism exerted by something in the seminal fluid on own, but not foreign sperm cells. The importance of this extrasomatic sperm recognition for the outcome of sperm competitions is discussed.en_US
dc.descriptionThis Document is Protected by copyright and was first published by Frontiers. All rights reserved. It is reproduced with permission.en_US
dc.identifier.citationFrontiers in Ecology and Evolution 2015, 3en_US
dc.identifier.cristinIDFRIDAID 1258565
dc.identifier.doi10.3389/fevo.2015.00092
dc.identifier.issn2296-701X
dc.identifier.urihttps://hdl.handle.net/10037/8540
dc.identifier.urnURN:NBN:no-uit_munin_8101
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.rights.accessRightsopenAccess
dc.subjectsperm competitionen_US
dc.subjectsexual selectionen_US
dc.subjectsperm motilityen_US
dc.subjectejaculateen_US
dc.subjectArctic charren_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.titleOwn,but not foreign seminal fluid inhibits sperm activation in a vertebrate with external fertilizationen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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