“…This problem can be overcome by means of 5-bromodeoxyuridine (BrdU) treatment. Replication banding patterns can be induced in species that do not show euchromatic bands (Sumner, 1990), including fishes (Almeida Toledo et al, 1998;Giles, Thode & Alvarez, 1988;Hellmer, Voiculescu & Schempp, 1991;Amores, Bejar & Alvarez, 1995;Daga, Thode & Almores, 1996).…”