Dispersal in heterogeneous environments drives population dynamics and control of tsetse flies - Agropolis Accéder directement au contenu
Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2021

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

Résumé

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.
hôtes-vecteurs-parasites-environnement dans les maladies tropicales négligées dues aux trypanosomatides', Cirad,
Fichier principal
Vignette du fichier
Cecilia_2021_ProcB_SpatioTempModelTsetse.pdf (889.33 Ko) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03130014 , version 1 (03-02-2021)

Licence

Paternité

Identifiants

Citer

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

Altmetric

Partager

Gmail Facebook X LinkedIn More