Population sizes and dispersal pattern of tsetse flies: rolling on the river?

Authors

  • J. BOUYER,

    1. Cirad, UMR CIRAD-INRA Contrôle des maladies animales, Campus International de Baillarguet, F34398, Montpellier, France
    2. Centre International de Recherche-développement sur l’Elevage en Zone Subhumide (CIRDES), BP 454, Bobo-Dioulasso, Burkina Faso
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  • T. BALENGHIEN,

    1. Cirad, UMR CIRAD-INRA Contrôle des maladies animales, Campus International de Baillarguet, F34398, Montpellier, France
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  • S. RAVEL,

    1. Institut de Recherche pour le Développement, Unité mixte de Recherche IRD-CIRAD 177, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
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  • L. VIAL,

    1. Cirad, UMR CIRAD-INRA Contrôle des maladies animales, Campus International de Baillarguet, F34398, Montpellier, France
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  • I. SIDIBÉ,

    1. Centre International de Recherche-développement sur l’Elevage en Zone Subhumide (CIRDES), BP 454, Bobo-Dioulasso, Burkina Faso
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  • S. THÉVENON,

    1. Institut de Recherche pour le Développement, Unité mixte de Recherche IRD-CIRAD 177, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
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  • P. SOLANO,

    1. Centre International de Recherche-développement sur l’Elevage en Zone Subhumide (CIRDES), BP 454, Bobo-Dioulasso, Burkina Faso
    2. Institut de Recherche pour le Développement, Unité mixte de Recherche IRD-CIRAD 177, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
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  • T. DE MEEÛS

    1. Centre International de Recherche-développement sur l’Elevage en Zone Subhumide (CIRDES), BP 454, Bobo-Dioulasso, Burkina Faso
    2. Institut de Recherche pour le Développement, Unité mixte de Recherche IRD-CIRAD 177, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France
    3. Génétique et Evolution des Maladies Infectieuses, UMR CNRS/IRD 2724, Centre IRD de Montpellier, 911 Avenue d’Agropolis, BP 64501, 34394 Montpellier Cedex 5, France
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Dr Bouyer Jérémy, Fax: 00 226 20 97 23 20; E-mail: bouyer@cirad.fr

Abstract

The West African trypanosomoses are mostly transmitted by riverine species of tsetse fly. In this study, we estimate the dispersal and population size of tsetse populations located along the Mouhoun river in Burkina Faso where tsetse habitats are experiencing increasing fragmentation caused by human encroachment. Dispersal estimated through direct (mark and recapture) and indirect (genetic isolation by distance) methods appeared consistent with one another. In these fragmented landscapes, tsetse flies displayed localized, small subpopulations with relatively short effective dispersal. We discuss how such information is crucial for designing optimal strategies for eliminating this threat. To estimate ecological parameters of wild animal populations, the genetic measures are both a cost- and time-effective alternative to mark–release–recapture. They can be applied to other vector-borne diseases of medical and/or economic importance.

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