Effects of the Light-Dark Cycle and Scheduled Feeding on Behavior and Reproductive Rhythms of the Cyprinodont Fish, Medaka, Oryzias latipes
Circadian rhythms, Zeitgebers, Oryzias latipes, Meal-feeding, Behavior, Environmental factors
Medaka were maintained on a 16∶8 light-dark cycle and fed once daily on one of 5 different feeding schedules. The daily rhythm of agonistic behavior rapidly entrained to the scheduled feeding time and maintained this entrainment during a 3-day starvation period. In contrast the daily rhythms of egg laying and courtship stayed entrained to the L:D cycle regardless of the feeding schedule. Thus, temporal integration of this fish with its daily environment can involve multistimuli which concurrently and differentially entrain externally expressed circadian systems.
D. N. Weber and Richard E. Spieler. 1987. Effects of the Light-Dark Cycle and Scheduled Feeding on Behavior and Reproductive Rhythms of the Cyprinodont Fish, Medaka, Oryzias latipes .Experientia , (6) : 621 -624. http://nsuworks.nova.edu/occ_facarticles/186.