Changes in ear-pinna temperature as a useful measure of stress in sheep (Ovis aries)

T. E. Lowe, C. J. Cook, J. R. Ingram, P. J. Harris

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Activation of the sympathetic nervous system, with associated increases in heart rate and the redistribution of blood in preparation for 'fight or flight', is an integral part of the 'defence reaction'. In sheep, the defence reaction involves vasoconstriction in the ear-pinna. If decreases in ear-pinna temperature (Tp) can be used to indicate vasoconstriction, then it may be possible to use changes in Tp as a measure of the defence reaction. Ewe lambs were exposed to stressors including mustering into pens, moving between pens, isolation from conspecifics, and prolonged periods of exercise. Measurements of heart rate (HR), Tp, vaginal temperature (Tv), and salivary cortisol and urinary catecholamine concentrations were used to assess stress responses. A repeatable pattern of changes in HR, Tp and Tv was observed in response to stressors. Short-term disturbances resulted in increased HR, reduced Tp, and increased Tv. More sustained disturbances - for example, prolonged periods of exercise - resulted in a sustained elevation in HR, a sustained decrease in Tp, and a sustained elevation in Tv. The highest levels of cortisol and catecholamines were associated with the treatments that resulted in the longest periods of decreased Tp. We infer that changes in Tp occur largely in response to changes in sympathetic nervous activity, and that the potential exists to measure elements of stress responses by monitoring Tp in freely behaving animals. This is a minimally invasive measure that allows the monitoring of modest numbers of animals over prolonged periods with minimal handling.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalAnimal Welfare
Volume14
Issue number1
Publication statusPublished - 2005
Externally publishedYes

Fingerprint

Ear Auricle
Domestic Sheep
ears
Sheep
sheep
Temperature
temperature
heart rate
Heart Rate
vasoconstriction
catecholamines
Vasoconstriction
Catecholamines
cortisol
Hydrocortisone
stress response
Animals
exercise
sympathetic nervous system
Monitoring

Cite this

Lowe, T. E., Cook, C. J., Ingram, J. R., & Harris, P. J. (2005). Changes in ear-pinna temperature as a useful measure of stress in sheep (Ovis aries). Animal Welfare, 14(1), 35-42.
Lowe, T. E. ; Cook, C. J. ; Ingram, J. R. ; Harris, P. J. / Changes in ear-pinna temperature as a useful measure of stress in sheep (Ovis aries). In: Animal Welfare. 2005 ; Vol. 14, No. 1. pp. 35-42.
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Lowe, TE, Cook, CJ, Ingram, JR & Harris, PJ 2005, 'Changes in ear-pinna temperature as a useful measure of stress in sheep (Ovis aries)', Animal Welfare, vol. 14, no. 1, pp. 35-42.

Changes in ear-pinna temperature as a useful measure of stress in sheep (Ovis aries). / Lowe, T. E.; Cook, C. J.; Ingram, J. R.; Harris, P. J.

In: Animal Welfare, Vol. 14, No. 1, 2005, p. 35-42.

Research output: Contribution to journalArticle

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