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By: Garavello, Julio Cesar - Garavello, J. P. - Oliveira, AK.Type: ArticleIn: Instituto Internacional de EcologiaVolume:Series:Issue:Date: 2010-08-01Page Range:Publication Info: Instituto Internacional de Ecologia 2010-08-01Subjects: Brazil fishery and fishermen Freshwater fishes Maranhão Neotropical Tocantins