Estudo de simuliidae (diptera) e seus criadouros em igarapés afluentes baixos dos rios Guamá e Acará.

Abstract

This work aims to survey the simulid species of rivers and streams tributary to the Guamá and Acará rivers, near Belém, to study the seasonality and biology of the most important species, of greater abundance or that are attacking humans in search of blood, to characterize the physical-chemical aquatic environments, simulid breeding sites, based on velocity, temperature, flow, electrical conductivity, pH, dissolved oxygen, salts and transparency. Simulium perflavum Roubaud, 1906 breeding sites were found in the headwaters of Água Preta Lagoon (Belém), Santa Izabel, Road to Bujaru, São Francisco Road (Americano) and Castanhal. S. perflavum breeding sites were observed in shaded and sunny conditions, on substrates: dark and yellowish rock, green and old leaves, roots, aquatic plants, branches. At depths 4cm to 52 at velocities of 4 cm/s to 15 cm/s, water temperature 21°C to 28°C, no evidence of association with S. inaequale and S. incrustatum species. Other species were found, at depths of 12 in to 37 in velocities from 4cm/s to 13cm/s, temperature from 25°C to 26°C, as S. quadrifidum, S. goeldii evidenced in São Francisco (Americano) road, associated with each other and with S. perflavum. S. aequifurcatum was found in igarapé do cipó (Castanhal) biting man and horse, these species breeding in similar environments of shading and substrates. S. goeldii had its distribution expanded, since it was not reported in Pará State. The females of S. perflavum were observed ovipositing in the breeding sites; this is an important observation because only pupae were known to be raised, thus allowing studies of its biological cycle for comparison with other studies already developed. The collected material is organized in a collection with a log book, collection codes for pupae, larvae and adults, expanding the Simuliidae collection at MPEG.