Effects of the light-dark cycle and scheduled feeding on behavioral and reproductive rhythms of the cyprinodont fish, Medaka, Oryzias latipes.
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.
D000378:Agonistic Behavior / Q000528:radiation effects; D000818:Animals; D001522:Behavior, Animal / Q000528:radiation effects; D002940:Circadian Rhythm; D003532:Cyprinodontiformes / Q000502:physiology*; D005260:Female; D005502:Food; D008027:Light; D008297:Male; D009990:Oryzias / Q000502:physiology*; D010058:Oviposition / Q000528:radiation effects; D010507:Periodicity; D012098:Reproduction / Q000528:radiation effects