Ovulation and equine body temperature and heart rate circadian rhythms
| Autor: | J. W. Evans, C. De Roshia, D. C. Holley, C. M. Winget |
|---|---|
| Rok vydání: | 1976 |
| Předmět: |
Maximum temperature
medicine.medical_specialty Deep body temperature media_common.quotation_subject Biology Dark period Rhythm Endocrinology Infradian rhythm Internal medicine Heart rate medicine General Earth and Planetary Sciences Circadian rhythm General Agricultural and Biological Sciences Ovulation General Environmental Science media_common |
| Zdroj: | Journal of Interdisiplinary Cycle Research. 7:25-37 |
| ISSN: | 0022-1945 |
| DOI: | 10.1080/09291017609359502 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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