Endogenous circatidal rhythm in the Manila clam Ruditapes philippinarum (bivalvia : Veneridae)

Manila clams, Ruditapes philippinarum, removed from their natural environment and maintained for 9 weeks in continuously immersed conditions exhibited a clear endogenous circatidal rhythm in oxygen consumption. The clams exhibited a semidiurnal rhythmicity in oxygen consumption after showing a diurn...

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Bibliographic Details
Published in:Marine biology 1999-06, Vol.134 (1), p.107-112
Main Authors: KIM, W. S, HUH, H. T, LEE, J.-H, RUMOHR, H, KOH, C. H
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
Circadian rhythm
Diurnal variations
Fundamental and applied biological sciences. Psychology
Marine
Marine biology
Mollusks
Natural environment
Oxygen
Oxygen consumption
Protozoa. Invertebrata
Ruditapes philippinarum
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Summary:Manila clams, Ruditapes philippinarum, removed from their natural environment and maintained for 9 weeks in continuously immersed conditions exhibited a clear endogenous circatidal rhythm in oxygen consumption. The clams exhibited a semidiurnal rhythmicity in oxygen consumption after showing a diurnal pattern in the first few days (5 to 7 d) of the experiment. The results of the present study indicate that activity rhythms of clams are controlled not only by exogenous factors, but also by an endogenous circatidal periodicity.
ISSN:0025-3162
1432-1793
DOI:10.1007/s002270050529