A circannual rhythm in bovine pineal serotonin

R. Philo, R. J. Reiter

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Bovine pineal serotonin (5-HT) was analyzed at the time of the solstices and equinoxes from December, 1975 until June, 1978. The highest values of 5-HT were detected at the winter solstices and lowest values at the summer solstices of each year examined. The peaks in bovine pineal 5-HT correspond with a lessened fertility in cattle reported during the winter months.

Original languageEnglish (US)
Pages (from-to)664-665
Number of pages2
Issue number6
StatePublished - Jun 1980

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology


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