Factors affecting the circadian rhythm in plasma cortisol concentrations in the horse.
摘要：
We conclude that a circadian cortisol rhythm exists in horses in the absence of any known cues imposed by humans. However, this rhythm can be obliterated by the minor perturbation of removing the horse from its accustomed environment. By contrast, the rhythm occurs in trained racehorses, suggesting either that they have adapted to their environment thereby allowing an endogenous rhythm to emerge, or that the rhythm is entrained by their daily routine. These observations highlight the difficulties in determining the cortisol status of a horse, since measurements will be affected by time of day, the occurrence of short-term fluctuations, and how accustomed the horse is to its environment.
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关键词：
Animals Hydrocortisone Adaptation, Physiological Circadian Rhythm Horses Physical Exertion Environment Animal Feed Female
DOI：
10.1016/0739-7240(94)90030-2
被引量：
年份：
1994
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