Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-06T08:08:09.529Z Has data issue: false hasContentIssue false
  • English
  • Français

Entrainment of the circadian rhythm of food demand by infradian cycles of light-dark alternation in Hoplosternum littorale (Teleostei)

Published online by Cambridge University Press:  15 October 1991

Thierry Boujard ,
Yann Moreau  and
Pierre Luquet
Thierry Boujard
Affiliation:
INRA, Hydrobiologie, BP 709, 97387 Kourou Cedex, France Present address: INRA Hydrobiologie, BP 3, 64310 Ascain, France
Yann Moreau
Affiliation:
INRA, Hydrobiologie, BP 709, 97387 Kourou Cedex, France
Pierre Luquet
Affiliation:
INRA, Hydrobiologie, BP 709, 97387 Kourou Cedex, France
Get access

Abstract

Hoplosterum littorale (Hancock, 1828) shows a marked circadian rhythm of food demand. Feeding activity is mainly nocturnal, with two peaks, and is synchronized with the diel light cycle. We tested the effect of infradian (period >28 h) light/dark cycles on this rhythm in fish with demand-feeders: fish subjected to a 13.5 L/22.5 D light/dark cycle for 8 days and a 25.5 L/10.5 D cycle for a further 8 days showed a strictly nocturnal feeding activity, a response that only passively reflected the cyclic alternation of light and dark.

Keywords

Siluriformdiel cyclefeeding rhythmsSiluriformerythmes circadienscycles nycthémérauxalimentation
Type
Research Article
Information
Aquatic Living Resources , Volume 4 , Issue 4 , October 1991 , pp. 221 - 225
Copyright
© IFREMER-Gauthier-Villars, 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)