| chromosomal analysis of astyanax fasciatus (pisces, characidae) from the araguari river, uberlândia, mg, brazil. | the genus astyanax is one of the most numerous of the family characidae, comprising a large number of similar-shaped species, but displaying innumerable karyotypic variations in its chromosome number and/or structure. the literature describes a. fasciatus populations with diploid chromosome numbers varying from 2n = 45 to 2n = 48. in this study, a. fasciatus specimens captured in the araguari river (alto paraná basin) were cytogenetically characterized, revealing a diploid chromosome number of 2 ... | 2006 | 16680319 |