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By: Paes, Thécia Alfenas Silva Valente - Paes, José Mauro Valente - Rojas, Nilton Eduardo Torres - Rocha, Odete - dos Santos-Wisniewski, Maria JoséType: ArticleIn: Acta Limnologica BrasiliensiaVolume:Series:Issue:Date: 2011-12-01Page Range:Publication Info:Subjects: