Skip to Main content Skip to Navigation
Journal articles

Dispersal in heterogeneous environments drives population dynamics and control of tsetse flies

Abstract : Spatio-temporally heterogeneous environments may lead to unexpected population dynamics. Knowledge is needed on local properties favouring population resilience at large scale. For pathogen vectors, such as tsetse flies transmitting human and animal African trypanosomosis, this is crucial to target management strategies. We developed a mechanistic spatio-temporal model of the age-structured population dynamics of tsetse flies, parametrized with field and laboratory data. It accounts for density- and temperature-dependence. The studied environment is heterogeneous, fragmented and dispersal is suitability-driven. We confirmed that temperature and adult mortality have a strong impact on tsetse populations. When homogeneously increasing adult mortality, control was less effective and induced faster population recovery in the coldest and temperature-stable locations, creating refuges. To optimally select locations to control, we assessed the potential impact of treating them and their contribution to the whole population. This heterogeneous control induced a similar population decrease, with more dispersed individuals. Control efficacy was no longer related to temperature. Dispersal was responsible for refuges at the interface between controlled and uncontrolled zones, where resurgence after control was very high. The early identification of refuges, which could jeopardize control efforts, is crucial. We recommend baseline data collection to characterize the ecosystem before implementing any measures.
Document type :
Journal articles
Complete list of metadata
Contributor : Jérémy Bouyer <>
Submitted on : Wednesday, February 3, 2021 - 11:32:55 AM
Last modification on : Thursday, February 11, 2021 - 3:00:03 PM


Publication funded by an institution


Distributed under a Creative Commons Attribution 4.0 International License




Hélène Cecilia, Sandie Arnoux, Sébastien Picault, Ahmadou Dicko, Momar Seck, et al.. Dispersal in heterogeneous environments drives population dynamics and control of tsetse flies. Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2021, 288 (1944), pp.20202810. ⟨10.1098/rspb.2020.2810⟩. ⟨hal-03130014⟩



Record views


Files downloads