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Fauna de Aedes (Ochlerotatus) scapularis e as alterações ambientais provocadas pela construção das barragens das usinas hidrelétricas Capim Branco I e Capim Branco II, no Rio Araguari, no Município de Uberlândia, Minas Gerais - Brasil

by da Silva, Glaucimar Soares

Abstract (Summary)
With the construction of two hydroelectric power plants in the lower level of Araguari river ?Capim Branco I and Capim Branco II ?, we had the opportunity to study the fauna of Ae.(Och.) scapularis in those areas, before and after the environmental alterations provoked bythe construction. The study was carried out from May 2003 to April 2005, at the same time inthe two areas. In the area of construction of the barrage of Capim Branco I the environmentalalterations began in May 2004, while in Capim Branco II they occurred in March 2005. Fourfixed points were chosen for capture of the insects being two in the area of construction of thebarrage of Capim Branco I (one to the edge of Araguari river and the other 184m further upon a higher topographical position) and two in Capim Branco II (one to the edge of Araguaririver and the other 584m up on a higher topographical position). This work has for objectivethe study of the fauna of Ae. (Och.) scapularis being taken into consideration thephysiographical characteristics of the areas. There have been a total of 96 field collectionsbeing 64 of 3:00 hours each and 32 of 12:00 hours each. Shannon traps were used and in thecaptures of 12:00 hours with three CDC-type traps being used. However these last ones werenot well succeeded. An ecological profile for each area was elaborated in order to study anddescribe their environment. A total of 61 samples of Ae. (Och.) scapularis were captured inthe two areas. In the first stage 90.57% of the insects were captured in the area of constructionof the barrage of Capim Branco II and 9.43% in the area of Capim Branco I. During thesecond stage 87.50% were captured in the area of construction of the barrage of CapimBranco I and 12.50% in the area of Capim Branco II. With the obtained data it was observedthat the area of construction of the barrage of Capim Branco II is more favorable to the faunaof Ae. (Och.) scapularis than Capim Branco I. The environmental alterations provoked by theconstruction of the barrages of Capim Branco I and Capim Branco II were related to thesuppression of vegetation, the great circulation of vehicles and machinery, intense noise, dustand workers' presence in the work place. We consider that there was no alteration in the faunaof Ae. (Och.) scapularis during the research before and during the environmental alteration, inthe area of construction of the barrage of Capim Branco I. In what regards the area ofconstruction of the barrage of Capim Branco II we are not able to reach to a conclusion oncethe research was held during only two months ? period of the construction of the barrage.
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Julio Cesar de Lima Ramires; Samuel do Carmo Lima; Delsio Natal

School:Universidade Federal de Uberlândia

School Location:Brazil

Source Type:Master's Thesis

Keywords:Ae. (Och.) scapularis

ISBN:

Date of Publication:05/28/2007

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