Subjects: HYDROELECTRIC power plants; BIOTIC communities; RIVERSBRAZIL
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Subjects: LIMNOLOGY; RIVER channels; HABITATSBRAZIL
Subjects: PARASITISM; CHARACIFORMES; RESERVOIRSPARANA River (Goias, Brazil); BRAZIL
Subjects: WASTE disposal in rivers, lakes, etc.; RIVERS; WATER pollutionNOVO Hamburgo (Brazil); BRAZIL
Subjects: SEWAGE purification; POLYOMAVIRUSES; SEWAGE disposal plantsBRAZIL
Subjects: WATER quality; BIOINDICATORS; INDICATORS & test-papersBRAZIL
Subjects: AEGLA; CRUSTACEAN populations; RIVERSBRAZIL
Subjects: SPECIES diversity; LEGUMES; RIVERSBRAZIL
Subjects: RHIPIDOCOTYLE; RIVERS; EJACULATIONBRAZIL
Subjects: WATER quality monitoring; RIVERS; ENTEROBACTERIACEAEBRAZIL