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By: De Rosa, LVS - Foresti, Fausto - Martins, C. - Oliveira, C. - Sobrinho, PE. - Pinto Wasko, AdrianeType: ArticleIn: Instituto Internacional de EcologiaVolume:Series:Issue:Date: 2007-05-01Page Range:Publication Info: Instituto Internacional de Ecologia 2007-05-01Subjects: constitutive heterochromatin Cyphocharax modestus Fish NOR Steindachnerina insculpta