Estudo da fauna de mosquitos (Diptera: Culicidae) em reservatórios de contenção de cheias em área metropolina da cidade de São Paulo, SP / Study of mosquitoes fauna (Diptera: Culicidae) in the reservoirs for the contention of food waters in São Paulo city metropolitan area, SP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Introduction. The City of São Paulo has been adopting highly measures to enable it to face up to the problem of flooding, among them being the construction of Reservoirs for the Containment of Flood Waters, known as "piscinões". In the dry season, after the occasional rains, these reservoirs, especially their hydraulic machinery, serve as breeding places for the Culicidae. Objectives. The assessment of the ecological aspects of the Culicidae fauna in the Reservoirs for the Containment of Flood Waters at Caguaçu and Inhumas to establish their diversity, dominance, similarity and species richness and, further, to correlate a-biotic factors with the numerical abundance of the mosquitoes. Materials and Methods: Monthly collections of Culicidae were undertaken during the period from March 2006 to February 2007, using the shell and battery aspirator methods. Results. A total of 8,917 Culicidae specimens were collected, 7,750 of which were larvae and pupae and 1,167 adults. The specimens were identified as belonging to 4 genera and 13 species. Culex quinquefasciatus, accounting for 98% of the specimens collected in the Inhumas Reservoir and 92% of those collected in Caguaçu, was the dominant species. The greatest frequency of mosquitoes was registered in the Inhumas Reservoir (6,378 larvae and 930 adults) and the greatest species richness in the Caguaçu Reservoir (11 species). A positive correlation was found as between the temperature and the numerical abundance of immature forms of the two areas and a positive correlation in Caguaçu and a negative correlation in Inhumas between the rainfall the and numerical abundance of immature forms. The analyses demonstrated that the a-biotic factors analyzed exercised little influence on the adult population. Conclusions. The species Culex quinquefasciatus was the dominant and most frequent species in both environments. Methods for the control of the species in the Reservoirs studied are necessary in view of their epidemiological potential in terms of the transmission of pathogenic agents.

ASSUNTO(S)

culex quinquefasciatus reservoirs for flood control urbanization culicidae vectors culicidae flooding reservatórios para controle das cheias vetores inundações urbanização

ACESSO AO ARTIGO

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