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Periodicity in the hatching of digenean eggs: a possible circadian rhythm in the life-cycle of Transversotrema patialense

Published online by Cambridge University Press:  06 April 2009

D. A. P. Bundy
D. A. P. Bundy
Affiliation:
Department of Zoology, University of London, King's College, London
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Summary

The temporal distribution of hatching of the embryonated eggs of Transversotrema patialense has been examined under different temperature and illumination regimens. Under a DL 12: 12 regimen at 30°C egg hatching exhibited a circadian rhythm with a period of 24 h. Within a diel time-frame hatching was distributed over the final 9 h of the light period with less than 2% of the eggs hatching during the dark period. This pattern was temperature independent over the range 25 to 30°C and persisted under constant illumination. It is suggested that the timing of hatching is under endogenous control and is functionally related to a circadian rhythm of behaviour of the intermediate host mollusc, Melanoides tuberculata.

Type
Research Article
Information
Parasitology , Volume 83 , Issue 1 , August 1981 , pp. 13 - 22
Copyright
Copyright © Cambridge University Press 1981

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