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dc.contributor.authorPersson, Lo
dc.contributor.authorRaunsgard, Astrid
dc.contributor.authorThorstad, Eva Bonsak
dc.contributor.authorØstborg, Gunnel Marie
dc.contributor.authorUrdal, Kurt
dc.contributor.authorSægrov, Harald
dc.contributor.authorUgedal, Ola
dc.contributor.authorHindar, Kjetil
dc.contributor.authorKarlsson, Sten
dc.contributor.authorFiske, Peder
dc.contributor.authorBolstad, Geir Hysing
dc.identifier.citationCanadian Journal of Fisheries and Aquatic Sciences. 2023, 1-16.en_US
dc.description.abstractEvolution of iteroparity is shaped by the trade-off between current and future reproduction.We studied variation in iteroparity among 205 050 individual Atlantic salmon caught in 179 rivers spanning 14◦ of latitude. The proportion of repeat spawners (iteroparous individuals) averaged 3.8% and ranged from 0% to 26% across rivers. Females were more often repeat spawners than males and had lower cost of reproduction in terms of lost body mass between spawning events. Proportion of repeat spawners for a given sea age at maturity, and the ratio of alternate to consecutive repeat spawners, increased with increasing population mean sea age at maturity. By combining smolt age, sea age at maturity, and age at additional spawning events, we identified 141 unique life-history types, and repeat spawners contributed 75% of that variation. Our results show that repeat spawners are important for life-history variation and suggest that the association between mean sea age and the frequency of repeat spawning is adaptive rather than a pleiotropic side effect arising from selection on sea age. age at maturity, life-history evolution, local adaptation, repeat spawning, trade-offen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectage at maturityen_US
dc.subjectlife-history evolutionen_US
dc.subjectlocal adaptationen_US
dc.subjectrepeat spawningen_US
dc.titleIteroparity and its contribution to life-history variation in Atlantic salmonen_US
dc.title.alternativeIteroparity and its contribution to life-history variation in Atlantic salmonen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.rights.holder© 2022 The Authorsen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalCanadian Journal of Fisheries and Aquatic Sciencesen_US
dc.relation.projectAndre: Swedish Research Council FORMAS (grant 2019-01649)en_US
dc.relation.projectEgen institusjon: Norwegian institute for nature research (NINA)en_US
dc.relation.projectAndre: Grieg Seafood ASAen_US
dc.relation.projectAndre: Rådgivende Biologer ASen_US
dc.relation.projectAndre: Statkraft Energi ASen_US
dc.relation.projectNorges forskningsråd: 280308en_US
dc.relation.projectNorges forskningsråd: 275862en_US
dc.relation.projectAndre: Norwegian Environment Agencyen_US
dc.relation.projectAndre: The power companies in the River Orklaen_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal