Boujard T., Moreau Yann, Luquet Pierre. (1991). Entrainment of the circadian rythm of food demand by infradian cycles of light-dark alternation in Hoplosternum littorale (Teleostei). Aquatic Living Resources, 4 (4), p. 221-225. ISSN 0990-7740.
Titre du document
Entrainment of the circadian rythm of food demand by infradian cycles of light-dark alternation in Hoplosternum littorale (Teleostei)
Année de publication
1991
Type de document
Article
Auteurs
Boujard T., Moreau Yann, Luquet Pierre
Source
Aquatic Living Resources, 1991,
4 (4), p. 221-225 ISSN 0990-7740
Hoplosternum littorale (Hancock, 1828) shows a marked circadium rhythm of food demand. Feeding activity is mainly nocturnal, with two peaks, and is synchronized whith the diel light cycle. We tested the effect of infradian (period > 28h) 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 cycle alternation of light and dark. (Résumé d'auteur)
