The development of endothermy during pouch life in the eastern barred bandicoot (Perameles gunnii), a marsupial

Ikonomopoulou, Maria P. and Rose, Randy W. (2006) The development of endothermy during pouch life in the eastern barred bandicoot (Perameles gunnii), a marsupial. Physiological and Biochemical Zoology, 79 3: 468-473. doi:10.1086/502819

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Author Ikonomopoulou, Maria P.
Rose, Randy W.
Title The development of endothermy during pouch life in the eastern barred bandicoot (Perameles gunnii), a marsupial
Journal name Physiological and Biochemical Zoology   Check publisher's open access policy
ISSN 1522-2152
Publication date 2006-05-01
Sub-type Article (original research)
DOI 10.1086/502819
Open Access Status File (Publisher version)
Volume 79
Issue 3
Start page 468
End page 473
Total pages 6
Place of publication Chicago, IL United States
Publisher University of Chicago Press
Language eng
Formatted abstract
Marsupials are born ectothermic and gradually become endothermic during pouch occupancy. In order to study the timing of this transition, we measured the metabolic rates of eight pouch-young eastern barred bandicoots (Perameles gunnii) at 25°C (the thermoneutral zone of adults), at 35°C (pouch temperature), and after injection with norepinephrine. From 5 to 7 wk of age, oxygen consumption (V̇O2) was higher at 35°C than at 25°C. At 8 wk, V̇O2 was significantly higher at 25°C than at 35°C. Norepinephrine administration at 5 and 6 wk had no effect on metabolic rate, but at 8 wk, near pouch vacation, it resulted in a significant increase in metabolic rate. Our results indicate that signs of thermoregulation for P. gunnii begin at 7 wk, and at 8 wk the species is endothermic, that is, able to increase heat production in response to both cold and norepinephrine. The appearance of fur, first seen at the age of 6 wk and fully developed at 8 wk, coincides with the onset of endothermy. © 2006 by The University of Chicago. All rights reserved.
Keyword Marsupialia
Basal Metabolism
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Institute for Molecular Bioscience - Publications
 
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Created: Thu, 29 Sep 2011, 18:07:49 EST by Ms Maria Ikonomopoulou on behalf of Institute for Molecular Bioscience