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We studied the influence of climatic parameters in the daily haematophagic activity of Cerqueirellum argentiscutum from September/1999 to August/2000. The bite activity observed was different according to the annual rain precipitation (dry and rainy seasons). Humidity and temperature were the factors that most influenced it in both periods. During the dry season, it was greater in the beginning of the morning, showing a positive association with the humidity. However, during the rainy season, it was negatively related to that same factor. When wind speed was higher than 10 Km.h-1, it was reduced abruptly. Light intensity, atmospheric pressure and cloudiness seemed to act as secondary factors in the daily abundance of C. argentiscutum. Foi estudada a influência dos parâmetros climáticos na atividade hematofágica diária de Cerqueirellum argentiscutum durante setembro/1999 a agosto/2000. Foi observado que a atividade foi diferente conforme as estações (seca e chuvosa). A umidade e a temperatura foram os fatores que mais influenciaram na atividade em ambas as estações. Na estação seca foi maior no início da manhã apresentando uma associação positiva com a umidade. Porém na estação chuvosa se mostrou negativamente relacionada com este mesmo fator. Quando a velocidade do vento foi superior a 10 Km.h-1 diminuiu bruscamente. A luminosidade, pressão atmosférica e nebulosidade parecem atuar como fatores secundários na abundância diária de C. argentiscutum

acta amazonica

The influence of climatic parameters in the haematophagic daily activity of Cerqueirellum argentiscutum (Shelley &amp; Luna Dias) (Diptera: Simuliidae) in Amazonas, Brazil