Ovulation and equine body temperature and heart rate circadian rhythms
作者:
J. W. Evans,
C. M. Winget,
C. De Roshia,
D. C. Holley,
期刊:
Journal of Interdisciplinary Cycle Research
(Taylor Available online 1976)
卷期:
Volume 7,
issue 1
页码: 25-37
ISSN:0022-1945
年代: 1976
DOI:10.1080/09291017609359502
出版商: Taylor & Francis Group
关键词: Circadian rhythm;cycles;equine temperature;heart rate;ovulation
数据来源: Taylor
摘要:
Deep body temperature (DBT) and heart rate (HR) circadian rhythms were determined by radiotelemetry in 4 mares kept under controlled light and temperature conditions. Ovulations were determined by rectal palpation of their ovaries. Mean DBT values ranged from 35.85 ± .04 to 37.22 ± .02°C The circadian range of oscillation was extremely low, approximately 0.5° C, with time of maximum temperature occurring midway through the dark period. Mean HR values ranged from 36.4 ± 1.7 to 53.0 ±3.6 beats per min. The circadian range of oscillation was also low, less than 15 beats per min with time of maximum HR occurring approximately at the time of lights off. The HR circacadian rhythm peaked before the DBT circadian rhythm by 3 to 8 hrs. Ovulation did not appear to consistently affect DBT and HR circadian rhythms or their phase relationships.
点击下载:
PDF (665KB)
返 回