Qualidade da água em canais de abastecimento com cultivo de Colossoma macropomum (Cuvier, 1816)

Abstract

The activity of creation of aquatic organisms in the country is hopeful and caring for the environment provide the best quality production. The objective this study was to evaluate water quality in supply channels with cultured tambaqui (Colossoma macropomum). We used a supply channel 35 meters long, which has a trapezoidal shape, cut with wire mesh and PVC coated zinc. Two studies, the initial experiment determined the rates of stocking density on tambaqui culture system (duration of 40 days), then the characterization of the effluent arising from the cultivation of tambaqui in channels using biofilters containing E. crassipes lasting 60 days. In both experiments, were monitored physico-chemical water. In the first experiment, the analysis performed by an ANOVA and Tukey test (p <0.05) showed that water quality in the supply channels were not influenced by planting densities, so little tangible changes have occurred in the parameters of fish in different treatments of the study. While the second experiment fori significant differences (p <0.05) between ammonia, alkalinity and hardness of the effluent treatment systems of the two, however it was proven the efficiency of water hyacinth in the removal of nutrients such as phosphorus, which recommended the its use in farming systems.