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Shivering and non-shivering thermogenesis in a marsupial, the eastern barred bandicoot (Perameles gunni)
journal contributionposted on 2023-05-16, 16:09 authored by Rose, RW, Ikonomopoulou, M
We investigated the metabolic rate of the Tasmanian marsupial, the eastern barred bandicoot, Perameles gunnii, before and after acclimation to cold temperature (5Â°C) for a 2-week period. Although body temperature did not change significantly, we observed a significant increase in the metabolic rate (MR) when measured at 5Â°C before and after cold acclimation. Nor-epinephrine had a significant effect on the metabolic rate when measured in the thermoneutral zone and when measured at 5Â°C after cold acclimation; however, there was no significant increase when measured at 5Â°C before cold acclimation. Nor-epinephrine also resulted in a small but significant decrease in body temperature. Electromyography (EMG) measurements were obtained before and after cold acclimation during shivering. Shivering decreased after two weeks of cold exposure indicating that the bandicoot had acclimated to that temperature. Nor-epinephrine (NE) significantly reduced shivering before but not after cold acclimation. The metabolic rate and shivering decreased in the adult eastern barred bandicoot after acclimation at 5Â°C and nor-epinephrine had similar effects to cold acclimation. Our findings of minor changes in thermal conductance suggest that insulation differences were unlikely explanations for our results. These experiments indicate that this marsupial is able to increase its heat production by non-shivering thermogenesis. Â© 2004 Elsevier Ltd. All rights reserved.
Publication titleJournal of Thermal Biology
Department/SchoolSchool of Natural Sciences
PublisherPergamon-Elsevier Science Ltd
Place of publicationUK