RiversSwimming PoolsRoss River virusFresh WaterWater MovementsWater Pollutants, ChemicalWater PollutionEnvironmental MonitoringFishesGene PoolWater MicrobiologySeasonsWater QualityGeologic SedimentsBrazilEcosystemPopulation DensityFloodsWater Pollution, ChemicalCatfishesGeographyBiodiversityCyprinidaePopulation DynamicsTrematode InfectionsOttersOnchocerciasis, OcularWater SupplySewageFish DiseasesSalmonPhylogenySimuliidaeDolphinsFisheriesAlphavirus InfectionsConservation of Natural ResourcesPhytoplanktonInvertebratesAnimal MigrationWetlands