Document Detail

Thermographic evaluation of the lower critical temperature in weanling horses.
MedLine Citation:
PMID:  17645406     Owner:  NLM     Status:  MEDLINE    
Accommodating weanling horses in loose housing (sleeping hall with deep-litter bed and paddock) environments in winter at northern latitudes exposes the nonhuman animals to low ambient temperatures. We determined the heat loss of nine weanling horses in a cold environment by infrared thermography to assess their thermoregulatory capacity. The rate of heat loss was 73.5 to 98.7 W/m2 from the neck and 69.9 to 94.3 W/m2 from the trunk. The heat loss was higher at -16 degrees C than at 0 degrees C and -9 degrees C (p</=.01), indicating that the lower critical temperature may have been between -9 degrees C and -16 degrees C. Surprisingly, the heat loss from the trunk was less at -23 degrees C than -16 degrees C (p<.05). The frost on the surface of the hair coat at -23 degrees C probably disturbed the thermographic examination. Thus, thermography is not necessarily suitable for determining heat loss at very cold temperatures. Our results emphasize the importance of taking the housing temperature into account in planning the feeding of cold-housed weanling horses in northern latitudes.
Elena Autio; Minna-Liisa Heiskanen; Jaakko Mononen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied animal welfare science : JAAWS     Volume:  10     ISSN:  1088-8705     ISO Abbreviation:  J Appl Anim Welf Sci     Publication Date:  2007  
Date Detail:
Created Date:  2007-07-24     Completed Date:  2007-08-23     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9804404     Medline TA:  J Appl Anim Welf Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  207-16     Citation Subset:  IM    
Equine Information Centre, Kuopio, Finland.
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MeSH Terms
Animals, Newborn / physiology
Body Temperature / physiology
Body Temperature Regulation / physiology*
Cold Temperature*
Horses / physiology*
Housing, Animal / standards
Sensitivity and Specificity
Thermography / methods,  standards,  veterinary*

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