The avoidance of ammonia by sheep

Phillips, Clive J., Pines, Matthew K. and Muller, Tracy (2012) The avoidance of ammonia by sheep. Journal of Veterinary Behavior, 7 1: 43-48.


Author Phillips, Clive J.
Pines, Matthew K.
Muller, Tracy
Title The avoidance of ammonia by sheep
Language of Title eng
Journal name Journal of Veterinary Behavior   Check publisher's open access policy
Language of Journal Name eng
ISSN 1558-7878
1878-7517
Publication date 2012-01
Sub-type Article (original research)
DOI 10.1016/j.jveb.2011.05.027
Volume 7
Issue 1
Start page 43
End page 48
Total pages 6
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2013
Language eng
Abstract The avoidance of ammonia by sheep was tested using operant conditioning techniques, training 12 sheep to operate a lever to open a door that would allow them to traverse a chamber with or without ammonia and obtain a food reward. One half of the sheep had been previously exposed to ammonia at 45 ppm in a simulated ship voyage, and the other half were kept in identical conditions but without ammonia. The maximum number of lever presses, or breakpoint, achieved when the chamber contained 45-ppm ammonia was compared with the number when the chamber contained no ammonia. There was a significantly lower mean breakpoint when the sheep traversed the chamber filled with ammonia (mean: 4.2 presses), compared with the chamber filled with fresh air (mean: 6.6 presses), demonstrating that sheep exhibited a moderate aversion to 45-ppm ammonia. Although the scale of the reduction in mean breakpoint was considerable, the aversion was only clearly demonstrated in 75% of the sheep, and there was no evidence that prior exposure influenced this aversion. It is therefore concluded that sheep show a moderate aversion to 45-ppm ammonia, with no evidence of sensitivity being affected by previous exposures.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 8 January 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Veterinary Science Publications
 
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Created: Wed, 29 Feb 2012, 11:42:25 EST by Annette Winter on behalf of School of Veterinary Science