AVALIAÇÃO BIO-FÍSICO-QUÍMICA DA ÁGUA E INTERAÇÃO COM A ICTIOFAUNA EM SUB-BACIAS DO RIO PARANÁ, BRASIL CENTRAL.

Abstract

Changes in the aquatic environment with respect to water quality tends to generate an environmental imbalance that influences us dependent beings that environment. This study aims to evaluate and compare 31 streams belonging to the sub-basins of the Meia Ponte, Piracanjuba and Santa Maria the physicochemical characteristics (nitrate, phosphate, conductivity, pH, turbidity, temperature, dissolved oxygen), hydrological (water speed ) and biological components of water (algal biomass) by sub-basin evaluate the relationship between algal biomass, with the concentration of nitrate and phosphate, and finally to evaluate the relationship between the abundance of fish with nitrate, phosphate , conductivity, pH, turbidity, algal biomass, temperature, dissolved oxygen and water velocity, considering all the sampled sub-basins. In each stream was given a 100m stretch where were the measurements of water features using handheld devices, except for nitrate, phosphate and algal biomass (chlorophyll α) whose concentrations were determined in the laboratory from samples water through the spectrophotometry method. The results showed that there are significant differences in the pH (between the sub-basin of the river Santa Maria and this Piracanjuba and the Half Bridge) and turbidity (between sub-basins Santa Maria and Meia Ponte), but was not found no relationship between algal biomass with the physical, chemical and hydrological aspects, however, was shown a relative abundance of fish with pH and conductivity.