Thermal history can affect the short-term thermal acclimation of basal metabolic rate in the passerine <i>Zonotrichia capensis</i>

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dc.contributor.authorBarcelo, Gonzalo
dc.contributor.authorSalinas, Jonathan
dc.contributor.authorCavieres, Grisel
dc.contributor.authorCanals, Mauricio
dc.contributor.authorSabat, Pablo
dc.date.accessioned2025-01-21T00:07:32Z
dc.date.available2025-01-21T00:07:32Z
dc.date.issued2009
dc.description.abstractThe obligatory cost of living for endotherms is measured by basal metabolic rate (BMR), a variable that is known to change after thermal acclimation. However, the relative timing between variation in ambient temperature and BMR is not well understood. in this study, we addressed this problem in the sparrow Zonotrichia capensis, studying whether previous thermal history affects the response of BMR to a new acclimation temperature. We found that after 4 weeks of acclimation either to 30 or 15 degrees C birds exhibited significant differences in BMR from pre-acclimation levels. Nevertheless, after a re-acclimation to the opposite treatment for six additional weeks, in the group previously acclimated to warm conditions the change in BMR was significantly greater than in the group previously acclimated to cold. We also found differences in the mass of the small intestine between groups but constancy in the mass of liver, kidney and heart masses at the end of the experiments. Our results indicate that the thermal history affects metabolic adjustments and highlights the importance of considering this when evaluating the plasticity of metabolic traits in small birds. (C) 2009 Elsevier Ltd. All rights reserved.
dc.description.funderFondecyt
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jtherbio.2009.06.008
dc.identifier.issn0306-4565
dc.identifier.urihttps://doi.org/10.1016/j.jtherbio.2009.06.008
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95633
dc.identifier.wosidWOS:000273203400006
dc.issue.numero8
dc.language.isoen
dc.pagina.final419
dc.pagina.inicio415
dc.revistaJournal of thermal biology
dc.rightsacceso restringido
dc.subjectBMR
dc.subjectPhenotypic plasticity
dc.subjectPhysiololgical flexibility
dc.subjectThermal acclimation
dc.subjectZonotrichia capensis
dc.subject.ods15 Life on Land
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa13 Acción por el clima
dc.titleThermal history can affect the short-term thermal acclimation of basal metabolic rate in the passerine <i>Zonotrichia capensis</i>
dc.typeartículo
dc.volumen34
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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