TRAN, Damien; PERRIGAULT, Mickael; CIRET, Pierre; PAYTON, Laura

doi:10.1098/rspb.2019.2440

Environnements et Paléoenvironnements OCéaniques [EPOC]

PERRIGAULT, Mickael

Environnements et Paléoenvironnements OCéaniques [EPOC]

CIRET, Pierre
Environnements et Paléoenvironnements OCéaniques [EPOC]

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Article de revue

Ce document a été publié dans

Proceedings of the Royal Society B: Biological Sciences. 2020-01-15, vol. 287, n° 1918, p. 20192440

Résumé en anglais

Marine coastal habitats are complex cyclic environments as a result of sun and moon interactions. In contrast to the well-known circadian orchestration of the terrestrial animal rhythmicity (~24h), the mechanism responsible for the circatidal rhythm (~12.4h) remains largely elusive in marine organisms. We revealed in subtidal field conditions that the oyster Crassostrea gigas exhibits tidal rhythmicity of circadian clock genes and clock-associated genes. Free-running experiment showed an endogenous circatidal rhythm. In parallel, we showed in the field that oysters’ valve behavior exhibited a strong tidal rhythm combined with a daily rhythm. In the free-running experiment, all behavioral rhythms were circatidal, and half of them were also circadian. Our results fuel the debate on endogenous circatidal mechanisms. In contrast to the current hypothesis on the existence of an independent tidal clock, we suggest that a single “circadian/circatidal” clock in bivalves is sufficient to entrain behavioral patterns at tidal and daily frequencies.< Réduire

Mots clés en anglais

Circatidal clock

circadian clock

tidal rhythm

biological timing

oyster

bimodal behavior

URI

https://oskar-bordeaux.fr/handle/20.500.12278/189137

DOI

http://dx.doi.org/10.1098/rspb.2019.2440

Unités de recherche

EPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805

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Bivalve mollusc circadian clock genes can run at tidal frequency

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Résumé en anglais

Mots clés en anglais

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DOI

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