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Journal of Experimental Biology 47,229-234 (1967)
Published by Company of Biologists 1967

Spontaneously Induced Rhythm of Tidal Periodicity in Laboratory-Reared Carcinus

BARBARA G. WILLIAMS 1 and E. NAYLOR 1

1 Department of Zoology, University College of Swansea

1. Laboratory-reared shore crabs show circadian rhythmicity which is transformed to approximate tidal rhythmicity after a period of chilling to 4°C.

2. Periodogram analysis of the results characterizes the periodicity of the two types of rhythm, which suggest that the ability to show a rhythm of tidal periodicity is an inherited feature of shore-crab physiology.

Submitted on April 7, 1967






© The Company of Biologists Ltd 1967