Core and peripheral site measurement of body temperature in short wool sheep

Understanding circadian rhythms of body temperature is important for the interpretation of single body temperature measurements and the assessment of the physiological state of an animal. The ability to measure body temperature at peripheral locations may also be important in the development of mini...

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Bibliographic Details
Published in:Journal of thermal biology 2020-05, Vol.90, p.102606-8, Article 102606
Main Authors: Kearton, Tellisa R., Doughty, Amanda K., Morton, Christine L., Hinch, Geoff N., Godwin, Ian R., Cowley, Frances C.
Format: Article
Language:English
Subjects:
Animals
Body Temperature
Circadian rhythm
Circadian Rhythm - physiology
Circadian rhythms
Diurnal rhythm
Female
iButton
Integrated circuits
Livestock
Microchip
Muscle, Skeletal - physiology
Neck
Remote sensor
Sheep
Sheep - physiology
Tail
Temperature requirements
Vagina
Wool
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Summary:Understanding circadian rhythms of body temperature is important for the interpretation of single body temperature measurements and the assessment of the physiological state of an animal. The ability to measure body temperature at peripheral locations may also be important in the development of minimally invasive tools for remote temperature measurement in livestock. This study aimed to investigate how well body temperature measured at peripheral sites reflected a commonly used core measurement (vaginal temperature) and the circadian rhythmicity of the body temperature of sheep with a view to practical application in extensive sheep production systems. Eleven crossbred ewes were implanted with peripheral temperature sensing microchips (LifeChip®) which were positioned transversely in the sternocleidomastoid (neck) muscle and subcutaneously under the tail. iButton® temperature loggers were placed intravaginally to record core body temperature measurements (Tv). The body temperature measurements observed at the peripheral sites in the neck (Tn) and tail (Tt) differed significantly to those measured at the core site, Tv (P 
ISSN:0306-4565
1879-0992
DOI:10.1016/j.jtherbio.2020.102606