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dc.contributor.authorBourgeon, Sophie
dc.contributor.authorLeat, Eliza H. K.
dc.contributor.authorMagnusdottir, Ellen
dc.contributor.authorFurness, Robert W.
dc.contributor.authorStrøm, Hallvard
dc.contributor.authorPetersen, Aevar
dc.contributor.authorGabrielsen, Geir W.
dc.contributor.authorHanssen, Sveinn Are
dc.contributor.authorBustnes, Jan Ove
dc.coverage.spatialBjørnøya, Iceland, Shetland, Africa, Europe, Americaen_US
dc.date.accessioned2014-08-07T07:51:32Z
dc.date.accessioned2023-03-10T09:08:44Z
dc.date.available2014-08-07T07:51:32Z
dc.date.available2023-03-10T09:08:44Z
dc.date.issued2014
dc.identifier.citationPLoS ONE 2014, 9(6)en_US
dc.identifier.issn1932-6203
dc.identifier.urihttps://hdl.handle.net/11250/3057563
dc.description.abstractEnvironmental conditions encountered by migratory seabirds in their wintering areas can shape their fitness. However, the underlying physiological mechanisms remain largely unknown as birds are relatively inaccessible during winter. To assess physiological condition during this period, we measured corticosterone concentrations in winter-grown primary feathers of female great skuas (Stercorarius skua) from three breeding colonies (Bjørnøya, Iceland, Shetland) with wintering areas identified from characteristic stable isotope signatures. We subsequently compared winter feather corticosterone levels between three wintering areas (Africa, Europe and America). Among females breeding in 2009, we found significant differences in feather corticosterone levels between wintering areas. Surprisingly, levels were significantly higher in Africa despite seemingly better local ecological factors (based on lower foraging effort). Moreover, contrary to our predictions, females sharing the same wintering grounds showed significant differences in feather corticosterone levels depending on their colony of origin suggesting that some skuas could be using suboptimal wintering areas. Among females wintering in Africa, Shetland females showed feather corticosterone levels on average 22% lower than Bjørnøya and Iceland females. Finally, the lack of significant relationships between winter feather corticosterone levels and any of the breeding phenology traits does not support the hypothesis of potential carry-over effects of winter feather corticosterone. Yet, the fitness consequences of elevated feather corticosterone levels remain to be determined.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleFeather Corticosterone Levels on Wintering GroundsHave No Carry-Over Effects on Breeding among ThreePopulations of Great Skuas (Stercorarius skua)en_US
dc.typePeer revieweden_US
dc.typeJournal article
dc.date.updated2014-08-07T07:51:32Z
dc.rights.holder© 2014 The Authorsen_US
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.source.volume9en_US
dc.source.issue6en_US
dc.identifier.doi10.1371/journal.pone.0100439
dc.identifier.cristin1145619
dc.relation.projectNorges forskningsråd: 184830en_US
dc.source.articlenumbere100439en_US


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