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dc.contributor.authorTrondrud, Liv Monica
dc.contributor.authorPigeon, Gabriel
dc.contributor.authorAlbon, Steve
dc.contributor.authorArnold, Walter
dc.contributor.authorEvans, Alina
dc.contributor.authorIrvine, R. Justin
dc.contributor.authorKról, Elżbieta
dc.contributor.authorRopstad, Erik
dc.contributor.authorStien, Audun
dc.contributor.authorVeiberg, Vebjørn
dc.contributor.authorSpeakman, John R.
dc.contributor.authorLoe, Leif Egil
dc.date.accessioned2021-08-12T08:16:43Z
dc.date.available2021-08-12T08:16:43Z
dc.date.issued2021-06-28
dc.description.abstractSeasonal energetic challenges may constrain an animal's ability to respond to changing individual and environmental conditions. Here, we investigated variation in heart rate, a well-established proxy for metabolic rate, in Svalbard reindeer (Rangifer tarandus platyrhynchus), a species with strong seasonal changes in foraging and metabolic activity. In 19 adult females, we recorded heart rate, subcutaneous temperature and activity using biologgers. Mean heart rate more than doubled from winter to summer. Typical drivers of energy expenditure, such as reproduction and activity, explained a relatively limited amount of variation (2–6% in winter and 16–24% in summer) compared to seasonality, which explained 75% of annual variation in heart rate. The relationship between heart rate and subcutaneous temperature depended on individual state via body mass, age and reproductive status, and the results suggested that peripheral heterothermy is an important pathway of energy management in both winter and summer. While the seasonal plasticity in energetics makes Svalbard reindeer well-adapted to their highly seasonal environment, intraseasonal constraints on modulation of their heart rate may limit their ability to respond to severe environmental change. This study emphasizes the importance of encompassing individual state and seasonal context when studying energetics in free-living animals.en_US
dc.identifier.citationTrondrud, Pigeon, Albon, Arnold, Evans, Irvine, Król, Ropstad, Stien, Veiberg, Speakman, Loe. Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management. Philosophical Transactions of the Royal Society of London. Biological Sciences. 2021;376(1831)en_US
dc.identifier.cristinIDFRIDAID 1923403
dc.identifier.doi10.1098/rstb.2020.0215
dc.identifier.issn0962-8436
dc.identifier.issn1471-2970
dc.identifier.urihttps://hdl.handle.net/10037/22003
dc.language.isoengen_US
dc.publisherThe Royal Societyen_US
dc.relation.journalPhilosophical Transactions of the Royal Society of London. Biological Sciences
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/ 267613/Norway/Trapped in a cold-adapted body: the causes and consequences of phenotypic change in a rapidly warming Arctic//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleDeterminants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy managementen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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