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Article Dans Une Revue Chronobiology International Année : 2000

Ontogeny of the ultradian rhythm of activity in Japanese quail

Résumé

As soon as they hatch, gallinaccous chicks follow broody hens. This matriarchal unit presents a temporal organization of activity. The ontogeny of this ultradian rhythm of activity was followed in Japanese quail during their first 3 weeks of life. Under controlled laboratory conditions, 12 groups of four chicks were recorded using an activity monitoring system. They were observed between the ages of 3 and 17 days. Chicks in groups presented an ultradian rhythm of activity, with a period that increased significantly from 14.3 +/- 1.4 minutes when chicks were 2 days old to 26.0 +/- 1.9 minutes when they were 16 days old. The increase of ultradian periodicity was particularly pronounced during their first and third weeks of life. Finally, the ultradian period was correlated positively with body weight of the chicks.
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hal-01308881 , version 1 (28-04-2016)

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Sophie Lumineau, Catherine Guyomarc'H, Jean-Pierre Richard. Ontogeny of the ultradian rhythm of activity in Japanese quail. Chronobiology International, 2000, 17 (6), pp.767--776. ⟨10.1081/CBI-100102112⟩. ⟨hal-01308881⟩
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