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Dispersal and survival of Anopheles funestus and A. gambiae s.l. (Diptera: Culicidae) during the rainy season in southeast Tanzania

Published online by Cambridge University Press:  10 July 2009

W. Takken ,
J.D. Charlwood ,
P.F. Billingsley  and
G. Gort
W. Takken*
Affiliation:
Laboratory of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands
J.D. Charlwood
Affiliation:
Laboratory of Entomology, Wageningen Agricultural University, PO Box 8031, 6700 EH Wageningen, The Netherlands
P.F. Billingsley
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, AB24 2TZ, Scotland, UK
G. Gort
Affiliation:
Department of Mathematics, Wageningen Agricultural University, Dreijenlaan 4, 6703 HA Wageningen, The Netherlands
*
*+31 317 484821 E-mail: willem.takken@medew.ento.wau.nl
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Abstract

In a rural area of southeastern Tanzania, studies were undertaken on the dispersal and survival of Anopheles funestus Giles and A. gambiae Giles s.l. during the rainy season. Blood fed, resting mosquitoes were collected indoors, marked with fluorescent powder and released on the same day from two different sites in the study area. For two weeks indoor resting mosquitoes were collected from 11 houses in the release area. Additional collections were made with a light trap from a sentinel house in the centre of the study area. Anopheles funestus was more abundant than A. gambiae s.l. Of 4262 A. funestus and 645 A. gambiae s.l. released, 4.3% and 7.4%, respectively, were recaptured. Dispersal of mosquitoes was not random: one of three areas was favoured significantly more than the other areas, as shown by the recapture and movement rates of marked mosquitoes. Based on the regression of the recapture rate, estimated daily survival rates of A. funestus and A. gambiae s.l. were 0.63 and 0.78, respectively. These were significantly different. The differences in dispersal and survival rates between the two species are discussed in view of local topography and species-specific characteristics.

Type
Review Article
Information
Bulletin of Entomological Research , Volume 88 , Issue 5 , October 1998 , pp. 561 - 566
Copyright
Copyright © Cambridge University Press 1998

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