Physiological flexibility in the Andean lizard <i>Liolaemus bellii</i>: seasonal changes in energy acquisition, storage and expenditure

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dc.contributor.authorNaya, Daniel E.
dc.contributor.authorVeloso, Claudio
dc.contributor.authorBozinovic, Francisco
dc.date.accessioned2025-01-21T01:04:58Z
dc.date.available2025-01-21T01:04:58Z
dc.date.issued2008
dc.description.abstractAccording to the "barrel model", an organism may be represented by a container, with input energy constraints (foraging, digestion, and absorption) symbolized by funnels connected in tandem, and energy outputs (maintenance, growth, and reproduction) symbolized by a series of spouts arranged in parallel. Animals can respond to changes in environmental conditions, through adjustments in the size of the funnels, the fluid stored inside the barrel, or the output flow through the spouts. In the present study, we investigate the interplay among these processes through the analysis of seasonal changes in organ size and metabolic rate in a lizard species (Liolaemus bellii) that inhabits extremely seasonal environments in the Andes range. We found that digestive organ size showed the greatest values during spring and summer, that is, during the foraging seasons. Energy reserves were larger during summer and autumn, and then decreased through winter and spring, which was correlated with overwintering maintenance and reproductive costs. Standard metabolic rate was greater during the high-activity seasons (spring and summer), but this increase was only noticeable at higher environmental temperatures. The ability of many lizard species to reduce their maintenance cost during the cold months of the year, beyond what is expected from temperature decrease, is probably related to their success in coping with highly fluctuating environments. Here, we demonstrate that this ability is correlated with high physiological flexibility, which allows animals to adjust energy acquisition, storing and expenditure processes according to current environmental conditions.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s00360-008-0292-6
dc.identifier.issn0174-1578
dc.identifier.urihttps://doi.org/10.1007/s00360-008-0292-6
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95758
dc.identifier.wosidWOS:000260376500008
dc.issue.numero8
dc.language.isoen
dc.pagina.final1015
dc.pagina.inicio1007
dc.revistaJournal of comparative physiology b-biochemical systemic and environmental physiology
dc.rightsacceso restringido
dc.subjectAnnual cycles
dc.subjectFat bodies
dc.subjectGut
dc.subjectMetabolism
dc.subjectPhenotypic plasticity
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titlePhysiological flexibility in the Andean lizard <i>Liolaemus bellii</i>: seasonal changes in energy acquisition, storage and expenditure
dc.typeartículo
dc.volumen178
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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