Dispersal of Aedes aegypti: Field study in temperate areas using a novel method
Paula E Bergero1, Carlos A Ruggerio2, Ruben Lombardo3, Nicolás J Schweigmann4, Hernán G Solari1
1 Departamento de Física FCEN-UBA and IFIBA-CONICET, Pabellón I, Ciudad Universitaria (1428) - Ciudad Autonoma de Buenos Aires, Argentina
2 Área de Ecología, ICO-UNGS, Calle Juan Maria Gutierrez 1150, (B1613GSX) - Los Polvorines, Provincia de Buenos Aires, Argentina
3 Área de Ecología, ICO-UNGS, Calle Juan Maria Gutierrez 1150, (B1613GSX) - Los Polvorines; Departamento de Ecología, Genética y Evolución, FCEN-UBA, Pabellón II, Ciudad Universitaria (C1428EHA) - Ciudad Autónoma de Buenos Aires, Argentina
4 Departamento de Ecología, Genética y Evolución, FCEN-UBA, Pabellón II, Ciudad Universitaria (C1428EHA) - Ciudad Autónoma de Buenos Aires, Argentina
Paula E Bergero
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Diagonal 113 y calle 64, c.c. 16 suc. 4 Postal Code: 1900. La Plata
Source of Support: None, Conflict of Interest: None
Background & objectives: Since Aedes aegypti was identified as vector of yellow fever and dengue, its dispersal is relevant for disease control. We studied the dispersal of Ae. aegypti in temperate areas of Argentina during egglaying, using the existing population and egg traps.
Methods: Two independent replicas of a unique experimental design involving mosquitoes dispersing from an urbanized area to adjacent non-urbanized locations were carried out and analyzed in statistical terms.
Results: We found relationship between stochastic variables related to the egg-laying mosquito activity (ELMA), useful to assess dispersal probabilities, despite the lack of knowledge of the total number of ovipositions in the zone. We propose to evaluate the egg-laying activity as minus the logarithm of the fraction of negative ovitraps at different distances from the buildings.
Interpretation & conclusion: Three zones with different oviposition activity were determined, a corridor surrounding the urbanization, a second region between 10 and 25 m and the third region extending from 30 to 45 m from the urbanization. The landscape (plant cover) and the human activity in the area appear to have an influence in the dispersal of Ae. aegypti. The proposed method worked consistently in two different replicas.