How does fragmentation by small dams affect stream ichthyofauna in the upper Paraná River basin? - Salvador, Gilberto Nepomuceno; Alves, Carlos Bernardo Mascarenhas; de Carvalho, Débora Reis; Pompeu, Paulo Santos; Leal, Cecília Gontijo; Formagio, Paulo Sérgio; Hughes, Robert Mason; Sulzbacher, Rosalva; Leitão, Rafael Pereira (Neotropical Ichthyology, 2025)