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The diel oviposition periodicity of Aedes aegypti (L.) (Diptera: Culicidae) in Trinidad, West Indies: effects of forced egg retention

Published online by Cambridge University Press:  24 February 2010

D.D. Chadee
D.D. Chadee*
Affiliation:
Department of Life Science, University of the West Indies, St. Augustine, Trinidad, West Indies
*
*Fax: 1-868-663-5241 E-mail: Chadee@tstt.net.tt
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Abstract

The diel oviposition periodicity of two groups of Aedes aegypti females (Trinidad strain), (i) thoses allowed access to oviposition sites and (ii) females forced to retain-eggs for four days, were studied under laboratory conditions using one female per cage and monitoring by changing substrates every two hours. The individual females which were allowed access to oviposition sites showed peak oviposition between 16.00–18.00 h (50% of eggs), whereas individuals forced to retain eggs for four days showed a similar pattern but with a significantly (P<0.001) larger peak oviposition between 16.00–18.00 h (94% of eggs). However, females forced to retain eggs laid most or all of their eggs in one container (84%), while females given access to oviposition sites distributed their eggs among 2–4 containers. The results of this study are discussed in the context of the strength of the circadian rhythms, oviposition strategies and its impact on vector control activities.

Keywords

Aedes aegypticircadian rhythmoviposition periodicitylaboratoryTrinidad
Type
Research Paper
Information
Bulletin of Entomological Research , Volume 100 , Issue 5 , October 2010 , pp. 599 - 603
Copyright
Copyright © Cambridge University Press 2010

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