The recent occurrence, establishment and potential impact of Geophagus proximus (Cichlidae: Perciformes) in the Tietê River reservoirs: an Amazonian fish species introduced in the Paraná Basin (Brazil) - Moretto, Evandro Mateus; Marciano, Fernanda Teixeira e; Velludo, Marcela Roquetti; Fenerich-Verani, Nelsy; Espíndola, Evaldo Luiz Gaeta; Rocha, O (Biodiversity and Conservation, 2008)