Environmental temperature has an influence on timing of the first ovulation of seasonal estrus in the mare

A 10-yr retrospective analysis of the time of onset of seasonal ovulation derived from the records of a Thoroughbred horse stud at latitude 35°S revealed a significant variation between years. The onset of seasonal ovulation was closely related to both the maximum (correlation coefficient r=0.56; P=...

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Published inTheriogenology Vol. 42; no. 6; pp. 1053 - 1060
Main Authors Guerin, M.V., Wang, X.J.
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.11.1994
Subjects
mare
ovulation
photoperiod
seasonal estrus
temperature
temperature
seasonal estrus
mare
photoperiod
ovulation
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Summary:A 10-yr retrospective analysis of the time of onset of seasonal ovulation derived from the records of a Thoroughbred horse stud at latitude 35°S revealed a significant variation between years. The onset of seasonal ovulation was closely related to both the maximum (correlation coefficient r=0.56; P=0.09) and minimum (r=−0.67; P<0.01) environmental temperatures. The trend of the temperature rise and the levels attained in the weeks immediately prior to ovulation were similar for both the environmental maximum and minimum temperatures in all years of the study. Environmental temperature may therefore play an important adjuvant zeitgeber for the timing of the first ovulation of estrus in the mare.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0093-691X
1879-3231
DOI:10.1016/0093-691X(94)90127-5