Assessment of the influence of a net cage fish culture on the water quality in Furnas reservoir, Brazil

Aquaculture is growing rapidly around the world. In Brazil, fish farming in net tanks has high potential due its large number of reservoirs. However, cultivable areas with a density may be more susceptible to eutrophication compared other production systems, and impair ecosystem where they are installed. Therefore, attention needed this type system avoid environmental impacts. The objective study was evaluate influence on water quality Furnas reservoir, Brazil. For physical-chemical analysis, samples were collected monthly during two cycles. results limits proposed by legislation for bodies It noted that nitrite phosphate presented mean values higher than those allowed; however, these not associated farming, there no reservoir period. Water influenced activities developed basin, such as livestock intensive agriculture use many fertilizers, released into through runoff.