Gene mapping of 18S and 5S rDNA genes in the karyotype of the three-spot Gourami Trichogaster trichopterus (Perciformes, Osphronemidae) - Pazza, Rubens; Kavalco, Karine Frehner; Penteado, Pierre Rafael; Kavalco, Sydney Antonio Frehner; Almeida-Toledo, Lurdes Foresti de (Zebrafish, 2009)