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Modelling the range expansion of the Tiger mosquito in a Mediterranean Island accounting for imperfect detection

AutorTavecchia, Giacomo ; Miranda, Miguel-Angel; Borrás, David; Bengoa, Mikel; Barceló, Carlos ; Paredes-Esquivel, Claudia; Schwarz, Carl
Palabras claveSite-occupancy model
Population dynamics
Tiger mosquito
Range expansion
Invasion
Fecha de publicación2017
EditorBioMed Central
CitaciónFrontiers in Zoology 14: 39 (2017)
Resumen[Backgrounds]: Aedes albopictus (Diptera; Culicidae) is a highly invasive mosquito species and a competent vector of several arboviral diseases that have spread rapidly throughout the world. Prevalence and patterns of dispersal of the mosquito are of central importance for an effective control of the species. We used site-occupancy models accounting for false negative detections to estimate the prevalence, the turnover, the movement pattern and the growth rate in the number of sites occupied by the mosquito in 17 localities throughout Mallorca Island. [Results]: Site-occupancy probability increased from 0.35 in the 2012, year of first reported observation of the species, to 0.89 in 2015. Despite a steady increase in mosquito presence, the extinction probability was generally high indicating a high turnover in the occupied sites. We considered two site-dependent covariates, namely the distance from the point of first observation and the estimated yearly occupancy rate in the neighborhood, as predicted by diffusion models. Results suggested that mosquito distribution during the first year was consistent with what predicted by simple diffusion models, but was not consistent with the diffusion model in subsequent years when it was similar to those expected from leapfrog dispersal events. [Conclusions]: Assuming a single initial colonization event, the spread of Ae. albopictus in Mallorca followed two distinct phases, an early one consistent with diffusion movements and a second consistent with long distance, 'leapfrog', movements. The colonization of the island was fast, with ~90% of the sites estimated to be occupied 3 years after the colonization. The fast spread was likely to have occurred through vectors related to human mobility such as cars or other vehicles. Surveillance and management actions near the introduction point would only be effective during the early steps of the colonization.
Versión del editorhttps://doi.org/10.1186/s12983-017-0217-x
URIhttp://hdl.handle.net/10261/161224
Identificadoresdoi: 10.1186/s12983-017-0217-x
e-issn: 1742-9994
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