Document Detail

That's hot: golden spiny mice display torpor even at high ambient temperatures.
MedLine Citation:
PMID:  23212435     Owner:  NLM     Status:  Publisher    
Golden spiny mice (Acomys russatus) living in the Judean desert are exposed to extended periods of food and water shortage. We investigated their thermal and metabolic response to three weeks of 50 % food reduction at ambient temperatures of 23, 27, 32 and 35 °C by long term records of metabolic rate and body temperature in the laboratory. At all ambient temperatures, A. russatus responded to starvation by a reduction of daily energy expenditure. At 32 and 35 °C, this metabolic adjustment fully compensated the reduced food availability and they maintained their energy balance at a slightly reduced body mass. At lower ambient temperatures, they could not fully compensate for the reduced food availability and kept a negative energy balance. The reduction of daily energy expenditure was largely achieved by the occurrence of daily torpor. Torpor even occurred at high ambient temperatures of 32 and 35 °C during which metabolic depression was not associated with a marked decrease of body temperature. The results show that the occurrence of daily torpor is not necessarily linked to cold exposure and the development of a pronounced hypothermia, but may even occur as depression of metabolic rate in a hot environment.
Kirsten Grimpo; Karen Legler; Gerhard Heldmaier; Cornelia Exner
Related Documents :
23632035 - Supplementation by thylakoids to a high carbohydrate meal decreases feelings of hunger,...
15736645 - Consumption guideline for cadmium in moose meat in northern british columbia, canada.
24472865 - Lactase persistence and augmented salivary alpha-amylase gene copy numbers might have b...
8832295 - Reduced cadmium and lead burden in japan in the past 10 years.
16480835 - Long-interval timing is based on a self-sustaining endogenous oscillator.
17626625 - If you feed them, they will come: a prospective study of the effects of complimentary f...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-2
Journal Detail:
Title:  Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology     Volume:  -     ISSN:  1432-136X     ISO Abbreviation:  J. Comp. Physiol. B, Biochem. Syst. Environ. Physiol.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-5     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8413200     Medline TA:  J Comp Physiol B     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Animal Physiology, Faculty of Biology, Philipps-Universität Marburg, Karl-von-Frisch-Straße 8, 35043, Marburg, Germany,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Manipulation of the coccyx with anesthesia for the management of coccydynia.
Next Document:  Smoking, menthol cigarettes, and peripheral artery disease in U.S. adults.