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dc.contributor.authorVillar, Jaime Otero
dc.contributor.authorJensen, Arne Johan
dc.contributor.authorStenseth, Nils Christian
dc.contributor.authorStorvik, Geir Olve
dc.contributor.authorVøllestad, Leif Asbjørn
dc.contributor.authorL'Abée Lund, Henning
dc.coverage.spatialNorwaynb_NO
dc.date.accessioned2017-08-04T07:58:16Z
dc.date.available2017-08-04T07:58:16Z
dc.date.created2012-09-26T15:11:53Z
dc.date.issued2012
dc.identifier.citationEcology and Evolution. 2012, 2 (9), 2192-2203.nb_NO
dc.identifier.issn2045-7758
dc.identifier.urihttp://hdl.handle.net/11250/2449879
dc.description.abstractAtlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history decisions. Given the complex life history, utilizing highly divergent habitats, the reasons for declines may be multiple and difficult to disentangle. Using recreational angling data of two sea age groups, one-sea-winter (1SW) and two-sea-winter (2SW) fish originated from the same smolt year class, we show that sea age at maturity of the returns has increased in 59 Norwegian rivers over the cohorts 1991– 2005. By means of linear mixed-effects models we found that the proportion of 1SW fish spawning in Norway has decreased concomitant with the increasing sea surface temperature experienced by the fish in autumn during their first year at sea. Furthermore, the decrease in the proportion of 1SW fish was influenced by freshwater conditions as measured by water discharge during summer months 1 year ahead of seaward migration. These results suggest that part of the variability in age at maturity can be explained by the large-scale changes occurring in the north-eastern Atlantic pelagic food web affecting postsmolt growth, and by differences in river conditions influencing presmolt growth rate and later upstream migration.nb_NO
dc.language.isoengnb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.subjectdischargenb_NO
dc.subjectmaturationnb_NO
dc.subjectNorwaynb_NO
dc.subjectSalmo salarnb_NO
dc.subjectsea surface temperaturenb_NO
dc.titleContemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian riversnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480nb_NO
dc.source.pagenumber2192-2203nb_NO
dc.source.volume2nb_NO
dc.source.journalEcology and Evolutionnb_NO
dc.source.issue9nb_NO
dc.identifier.doi10.1002/ece3.337
dc.identifier.cristin946895
dc.relation.projectNorges forskningsråd: 179569nb_NO
cristin.unitcode7511,3,0,0
cristin.unitnameAvdeling for akvatisk økologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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