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dc.contributor.authorSørum, Vidar
dc.contributor.authorFigenschou, Lars
dc.contributor.authorRudolfsen, Geir
dc.contributor.authorFolstad, Ivar
dc.date.accessioned2012-03-26T09:29:26Z
dc.date.available2012-03-26T09:29:26Z
dc.date.issued2011
dc.description.abstractA mismatch in timing between the release of male and female gametes in external fertilizers may lead to failed fertilization or, under sperm competition, reduced paternity. To quantify the actual synchrony of gamete release and the level of sperm competition we placed video cameras on two spawning grounds of a naturally spawning population of Arctic charr ( Salvelinus alpinus). Females release eggs in response to courting (quivering) in less than 1% of the cases, yet to both dominant and sneaker males. That is, females initiated spawning with dominant males in 73.3% of the recorded spawning events. Although the actual spawning seems to be largely under female control, 55.6% of spawning events occur under sperm competition. The average time delay between dominant and sneaker males milt release under sperm competition is 0.68 s. Thus, female reproductive decisions seem to be strongly influenced by male-male competition and this may have set the stage for the evolution and maintenance of the observed plasticity in ejaculate characteristics of male charr.en
dc.identifier.citationBehaviour 148(2011) nr. 9-10 s. 1157-1172en
dc.identifier.cristinIDFRIDAID 872576
dc.identifier.doidoi: 10.1163/000579511X596615
dc.identifier.issn0005-7959
dc.identifier.urihttps://hdl.handle.net/10037/4055
dc.identifier.urnURN:NBN:no-uit_munin_3775
dc.language.isoengen
dc.publisherBrill Academic Publishersen
dc.rights.accessRightsopenAccess
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Etologi: 485en
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en
dc.titleSpawning behaviour of Arctic charr (Salvelinus alpinus) : risk of sperm competition and timing of milt release for sneaker and dominant malesen
dc.typeJournal articleen
dc.typeTidsskriftartikkelen
dc.typePeer revieweden


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