AVALIAÇÃO DA QUALIDADE DO MEIO AQUÁTICO UTILIZANDO UM ÍNDICE BASEADO NA ASSEMBLEIA DE PEIXES, ALTO RIO PARANÁ, GOIÁS, BRASIL CENTRAL

Abstract

The purpose of this work is to evaluate the quality of water evironment of the hydrographic basin of river Piracanjuba, river Meia Ponte stream Santa Maria. Appendages of alto Paraná river basin, making used index based in fishes developed by Fialho (2009). For that then it was considered 14 describes: Globals ( Diversity simpson s rate e equitability), taxonomic (abundance and rich resourse of the species of those families Callichthyidae, Genere Incertae Sedis in Characidae (GISC), Curimatidae and Gymnotidae and trofic group of detritivory and abundance of Sternopygidae family and the rich specie of the Heptapteridae family. In this work the sampling was maden on the dry weater (from may to September of 2009). In 27 sampling sites 14 afluents streams of river Piracanjuba, 7 afluentes of river Meia Ponte and 6 of stream Santa Maria the collect icthyofauna it was maden by the electrofishing method. Witch in on single passing in on part of 100 m located amount and others low waters. The results show that 27 stream reaches only the sampling sites P03, P11, and P21 had a bigger escores value but it was not considered as preserved as IBP protocol prosposed by Fialho (2009). For other wise 10 sampling sites (P01,P07,P08,P09,P12,P16,P18,P19,P22 and P25) showed values igual 0, then it is considered with higher degree of anthropogenic desarrengement. With tthis comes with the conclusion all the sampling site are anthropogenic that can be explained by the intense cattle raising activity in that place.