Presença de mosquitos (Diptera: Culicidae) em piscinões na zona leste de São Paulo

Abstract

Introduction:Alterations in the environment contribute to changes in weather patterns, which cause an increase in rainfall, which causes flooding. Flooding has been addressed by building reservoirs, called piscinões, to contain the excess rain. In this report, we evaluated the Culicidae fauna of epidemiological importance in the reservoirs of Caguaçu and Inhumas. Methods: Monthly collections were performed in both reservoirs, which are situated in the Eastern section of the City of São Paulo. Monthly collections of Culicidae were undertaken using the entomological scoop method and a battery aspirator during the period between March 2006 and February 2007. Descriptive statistical and simple linear regression analyses of the data were carried out. Results: A total of 8,917 Culicidae mosquitoes were collected. The majority of the insects captured were of Culex (Culex) quinquefasciatus, representing 98.9% of the specimens identified in the Inhumas and 95.2% of those identified in Caguaçu. In the Caguaçu reservoir, the greatest frequency of immature mosquitoes was observed in the spillway (61%). In the Inhumas reservoir, the greatest occurrence of immature Culicidae was detected in the channel (42.6%). The linear regression analysis showed that 87% of the larvae in the third and fourth stages and 60% of the pupae were collected during periods of rainfall. In the Inhumas reservoir, 36% of the larvae and 18% of the pupae were collected during periods of rainfall. Conclusions: Culex quinquefasciatus, a vector for agents of filariasis and arbovirus diseases and a nuisance to the human population, was frequent in both environments. Methods of control of the species in the studied dams are necessary to reduce their epidemiological potential.

Biodiversidade de mosquitos (Diptera: Culicidae) nos parques da cidade de São Paulo I

“…(Cux. ) nigripalpus Theobald 1901, dentre outros (Forattini et al 1973, Urbinatti et al 2001, Taipe-Lagos & Natal 2003, Montes 2005, Laporta et al 2006, Silvério & Urbinatti 2011.…”

Avaliação do potencial de aplicação de técnicas compensatórias em áreas urbanas consolidadas

“…Nascimento et al, (1999) apontaram falhas de gerenciamento e operação como causa principal da decadência destes reservatórios brasileiros, que acabam se tornando ineficientes com o passar do tempo por acúmulo de resíduos sólidos e sedimentos, causando o assoreamento de seus leitos e diminuindo a capacidade de armazenamento dos mesmos, o que, somado a ineficiências hidráulicas devido à falta de manutenção, anularam o objetivo destes reservatórios, tornando-os mais um problema urbano a ser gerenciado. Além disso, estes reservatórios também são responsáveis por alguns problemas de saúde pública, aumentando a propagação de doenças de veiculação hídrica e degradando a qualidade das águas, pois recebem e acumulam altas cargas de esgotos e resíduos sólidos provenientes da drenagem (ALVES FILHO & RIBEIRO, 2006;SILVÉRIO & URBINATTI, 2011).…”