Negative Density-dependent Dispersal in Tsetse Flies: A Risk for Control Campaigns?. Issue 8 (August 2019)

• Record Type: Journal Article
• Authors: De Meeûs, Thierry; Ravel, Sophie; Solano, Philippe; Bouyer, Jérémy
• Is Part Of: Trends in parasitology. Volume 35:Issue 8(2019)
• Page Start: 615
• Page End: 621
• Publication Date: 2019-08
• Subjects: Glossina -- sleeping sickness -- nagana -- control campaigns -- effective population size -- migration rate; Parasitology -- Periodicals; Parasitology -- Periodicals; Biology -- Periodicals; Parasitology; Biology; Parasitologie -- Périodiques; Online resources; 571.999
• DOI: 10.1016/j.pt.2019.05.007
• Languages: English
• ISSNs: 1471-4922

Abstract

Abstract : Tsetse flies are vectors of parasites that cause diseases responsible for significant economic losses and health issues in sub-Saharan Africa, including sleeping sickness in humans and nagana in domestic animals. Efficient vector-control campaigns require good knowledge of the demographic parameters of the targeted populations. In the last decade, population genetics emerged as a convenient way to measure population densities and dispersal in tsetse flies. Here, by revealing a strong negative density-dependent dispersal in two dimensions, we suggest that control campaigns might unleash dispersal from untreated areas. If confirmed by direct measurement of dispersal before and after control campaigns, area-wide and/or sequential treatments of neighboring sites will be necessary to prevent this issue. Highlights: A strongly negative density-dependent dispersal was found in tsetse fly populations. Reducing tsetse fly densities may unleash dispersal and recolonization from neighboring sites. The long-term benefits of control campaigns may be jeopardized as a result.