Marine & Environmental Sciences Faculty Articles

Effects of the Light-Dark Cycle and Scheduled Feeding on Behavior and Reproductive Rhythms of the Cyprinodont Fish, Medaka, Oryzias latipes

Document Type

Article

Publication Date

6-1-1987

Publication Title

Experientia

Keywords

Circadian rhythms, Zeitgebers, Oryzias latipes, Meal-feeding, Behavior, Environmental factors

ISSN

0014-4754

Volume

43

Issue/No.

6

First Page

621

Last Page

624

Abstract

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.

Comments

©Birkhäuser Verlag Basel 1987

Additional Comments

NIH grant #: AM 25191; NIEHS ES grant #: 01985

DOI

10.1007/BF02126355

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