Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20599
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dc.contributor.authorCurrie, Shannon Een
dc.contributor.authorNoy, Kodieen
dc.contributor.authorGeiser, Fritzen
dc.date.accessioned2017-05-02T10:28:00Z-
dc.date.issued2015-
dc.identifier.citationAmerican Journal of Physiology: Regulatory, Integrative and Comparative Physiology, 308(1), p. R34-R41en
dc.identifier.issn1522-1490en
dc.identifier.issn0363-6119en
dc.identifier.urihttps://hdl.handle.net/1959.11/20599-
dc.description.abstractEndothermic arousal from torpor is an energetically costly process and imposes enormous demands on the cardiovascular system, particularly during early stage arousal from low body temperature (Tb). To minimize these costs many bats and other heterothermic endotherms rewarm passively from torpor using solar radiation or fluctuating ambient temperature (Tₐ). Because the heart plays a critical role in the arousal process in terms of blood distribution and as a source of heat production, it is desirable to understand how the function of this organ responds to passive rewarming and how this relates to changes in metabolism and Tb. We investigated heart rate (HR) in hibernating long-eared bats ('Nyctophilus gouldi') and its relationship to oxygen consumption (Vo₂) and subcutaneous temperature (Tsub) during exposure to increasing Tₐ compared with endogenous arousals at constant low Tₐ. During passive rewarming, HR and Vo₂ remained low over a large Tsub range and increased concurrently with increasing Tₐ (Q₁₀ 2.4 and 2.5, respectively). Absolute values were higher than during steady-state torpor but below those measured during torpor entry. During active arousals, mean HR and Vo₂ were substantially higher than during passive rewarming at corresponding Tsub. In addition, partial passive rewarming reduced the cost of arousal from torpor by 53% compared with entirely active arousal. Our data show that passive rewarming considerably reduces arousal costs and arousal time; we suggest this may also contribute to minimizing exposure to oxidative stresses as well as demands on the cardiovascular system.en
dc.languageenen
dc.publisherAmerican Physiological Societyen
dc.relation.ispartofAmerican Journal of Physiology: Regulatory, Integrative and Comparative Physiologyen
dc.titlePassive rewarming from torpor in hibernating bats: minimizing metabolic costs and cardiac demandsen
dc.typeJournal Articleen
dc.identifier.doi10.1152/ajpregu.00341.2014en
dcterms.accessRightsGolden
dc.subject.keywordsAnimal Physiological Ecologyen
local.contributor.firstnameShannon Een
local.contributor.firstnameKodieen
local.contributor.firstnameFritzen
local.subject.for2008060806 Animal Physiological Ecologyen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolOorala Aboriginal Centreen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailknoy2@une.edu.auen
local.profile.emailfgeiser@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20170331-112458en
local.publisher.placeUnited States of Americaen
local.format.startpageR34en
local.format.endpageR41en
local.identifier.scopusid84928629792en
local.peerreviewedYesen
local.identifier.volume308en
local.identifier.issue1en
local.title.subtitleminimizing metabolic costs and cardiac demandsen
local.access.fulltextYesen
local.contributor.lastnameCurrieen
local.contributor.lastnameNoyen
local.contributor.lastnameGeiseren
dc.identifier.staffune-id:knoy2en
dc.identifier.staffune-id:fgeiseren
local.profile.orcid0000-0001-7621-5049en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:20792en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitlePassive rewarming from torpor in hibernating batsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorCurrie, Shannon Een
local.search.authorNoy, Kodieen
local.search.authorGeiser, Fritzen
local.uneassociationUnknownen
local.identifier.wosid000347227800005en
local.year.published2015en
local.subject.for2020310907 Animal physiological ecologyen
local.subject.seo2020280102 Expanding knowledge in the biological sciencesen
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