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The direction of flight of mosquitoes (Diptera, Culicidae) near the ground in West African savanna in relation to wind direction, in the presence and absence of bait

Published online by Cambridge University Press:  10 July 2009

W. F. Snow
W. F. Snow
Affiliation:
School of Biological Sciences, University of Sussex, Brighton BN1 9BQ, England
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Abstract

The direction of mosquito flight near the ground, in relation to wind direction, was investigated at Keneba in The Gambia, West Africa. Directional flight traps facing eight directions sampled mosquitoes flying between ground level and 1·4 m, and unbaited and baited catches with a calf at the centre of the trap circle were performed. Data on non-host-oriented flight were obtained for unfed female Anopheles melas (Theo.), Culex thalassius Theo. and C. tritaeniorhynchus Giles from the unbaited catches, and from all catches of unfed females of the C. deceits group, and gravid and male mosquitoes, which did not respond to the calf. The baited catches included large numbers of A. melas, C. thalassius and C. tritaeniorhynchus, and fewer Anopheles squamosus Theo. and A. ziemanni Grünb. In both unbaited and baited situations, flight appeared to be in a predominantly upwind direction, although mere was some indication, in the presence of a calf, of convergence into the host stream.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 65 , Issue 4 , February 1976 , pp. 555 - 562
Copyright
Copyright © Cambridge University Press 1976

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