Movement of dengue vectors between the human modified environment and an urban forest in Rio de Janeiro |
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Authors: | Maciel-de-Freitas Rafael Neto Roman Brocki Gonçalves Jaylei Monteiro Codeço Claudia Torres Lourenço-de-Oliveira Ricardo |
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Institution: | Funda??o Oswaldo Cruz, Instituto Oswaldo Cruz, Departamento de Entomologia, Laboratório de Transmissores de Hematozoários. Av. Brasil, 4365, Manguinhos, RJ 21045-900 Rio de Janeiro, Brazil. |
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Abstract: | The movement of Aedes aegypti (L.) and Aedes albopictus (Skuse) females between sylvatic and urban environments was investigated by marking, releasing, and recapturing adults and by identifying rubidium (Rb)-marked eggs of females that were released after taking a bloodmeal containing RbCI. When released in the forest, Ae. albopictus females flew as far as 1000 m and reached houses within 1 wk. When Ae. albopictus were released close to houses, most females were recaptured near the release point, and Rb-marked eggs were found 1000 m away in the forest only once, 35 d after the release. These differing patterns of movement may suggest a preference of Ae. albopictus for the human-modified environment. Ae. aegypti, however, showed low tendency to disperse into the forest. The capacity of Ae. albopictus females to disperse from a sylvatic into a human-modified environment suggests that this species may play a role in the dissemination of forest-restricted pathogens, such as yellow fever virus. |
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