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

Abstract

The diptera of the Simuliidae family are widely distributed in the world and are of great medical and veterinary importance. In order to provide more subsidies to the knowledge of simulids, this work aims to survey the species of simulids from rivers and streams tributary to the Guamá and Acará rivers, near Belém (during two seasons of the year), and also to study the seasonal age and biology of the most important species, Finally, it aims to characterize the aquatic environments, breeding grounds for simulids, based on water velocity, temperature, flow, electrical conductivity, pH, dissolved oxygen, salts and transparency. Periodic excursions will be made to the study area to survey the species. The collected material is firstly put into plastic bags with plenty of air, then into thermal containers (Styrofoam) containing ice for the transportation of immatures from the field to the laboratory. Live pupae will be reared in test tubes containing moist paper, recognition code, and sealed with absorbent cotton pads until the adults emerge. The adult collections will be performed with human and equine bait and the identification of the material will be done with the support of Dr. V. Py-Daniel (INPA-AM). A total of 289 simulids relevant to this project were collected and studied. The field collection was established manually and correlated to certain substrates and the amount of immatures, with roots being the most important. In the laboratory, the collected material was duly observed, analyzed, drawn and measured with the help of stereoscopic microscopes and bacteriological microscopes for identification down to the species. It was possible to determine that the specimens collected at the headwaters of Água Preta Lagoon are of the species Simulium perflavum Roubaud, 1906. The collected material is organized in a collection with a log book, collection codes for pupae, larvae and adults. An exuberant breeding of S. perjlavum was observed in shaded conditions, without the species which are normally associated: S. inaequale and S. incrustatum.