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Niang A., Nignan C., Poda B. S., Sawadogo S. P., Dabire K. R., Gnankine O., Tripet F., Roux Olivier, Diabate A. (2019). Semi-field and indoor setups to study malaria mosquito swarming behavior. Parasites and Vectors, 12 (1), art. 446 [9 p.]. ISSN 1756-3305

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Lien direct chez l'éditeur doi:10.1186/s13071-019-3688-0

Semi-field and indoor setups to study malaria mosquito swarming behavior
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000485265300002
AuteursNiang A., Nignan C., Poda B. S., Sawadogo S. P., Dabire K. R., Gnankine O., Tripet F., Roux Olivier, Diabate A.
SourceParasites and Vectors, 2019, 12 (1), p. art. 446 [9 p.]. p. art. 446 [9 p.] ISSN 1756-3305
RésuméBackground The recent resurgence of interest in sterile insect techniques to control vector mosquitoes has renewed interest in novel methods for observing mating behavior. Malarial vectors of the Anopheles gambiae complex are known to mate in swarms at specific locations at dawn and dusk. Most knowledge of mosquito swarming behavior is derived from field observations and a few experimental studies designed to assess critical parameters that affect mosquito swarming. However, such studies are difficult to implement in the field because of uncontrollable environmental factors and mosquito conditions. Here, we present two experimental setups specifically designed to analyze mosquito swarming behavior and provide evidence that swarming behavior of mosquitoes can be generated and accurately assessed under both semi-field and laboratory conditions. Methods The Mosquito Ecology Research Facility setup is a semi-field enclosure made of 12 compartments (10.0 x 6.0 x 4.5 m L x W x H each) exposed to ambient meteorological and lighting conditions. The laboratory setup consists of a windowless room (5.1 x 4.7 x 3.0 m) in which both environmental and mosquito conditions can be controlled. In the two setups, 300 3-6-days-old An. coluzzii virgin males were released and some swarm characteristics were recorded such as the time at which the swarm started, the number of mosquitoes in the swarm and the height. Climatic conditions in the semi-field setup were also recorded. Results In both setups, An. coluzzii males displayed stereotyped and consistent swarming behavior day after day; males gradually gather into a swarm over a ground marker at sunset, flying in loops in relation to specific visual features on the ground. Although semi-field climatic conditions were slightly different from outdoors conditions, they did not impede swarming behavior and swarm characteristics were similar to those observed in the field. Conclusions Swarm characteristics and their consistency across days provide evidences that these facilities can be used confidently to study swarming behavior. These facilities come to complement existing semi-field setups and pave the way for new experimental studies which will enhance our understanding of mating behavior but also mosquito ecology and evolution, a prerequisite for application of genetic approaches to malaria control.
Plan de classementEntomologie médicale / Parasitologie / Virologie [052]
LocalisationFonds IRD [F B010076687]
Identifiant IRDfdi:010076687
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010076687

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