[Spectrofluorometric determination of epiphyseal serotonin (5-hydroxytrptamine equals 5-HT) in reptiles. Variations of the level of 5-HT as a function of season cycles in Testudo hermanni].
Pineal concentrations of serotonin in Testudo hermanni shows marked seasonal changes, according to a circannual rhythm with maximum in summer and minimum in winter, in animals which are living outside from one end of the year to the other, under natural lighting conditions. The amplitude of the 5-HT circadian rhythm shows also marked seasonal changes.
Animals↗