Cytogenetic studies in colossoma macropomum, colossoma mitrei and their interespecific hybrid - Almeida-Toledo, Lurdes Foresti de; Foresti, F; Toledo Filho, Sílvio de Almeida; Bernardino, G; Ferrari, W; Alcantara, R C G (Selection, Hybridization and Genetic Engineering in Aquaculture, 1987)