Cytogenetic Studies in Hemiodidae (Ostariophysi, Characiformes) Fishes from the Central Amazon

Jorge Ivan Rebelo Porto; Eliana Feldberg; José das Neves Falcão; Celeste Mutuko Nakayama

doi:10.1508/cytologia.58.397

Jorge Ivan Rebelo Porto, Eliana Feldberg, José das Neves Falcão, Celeste Mutuko Nakayama

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JOURNAL FREE ACCESS

1993 Volume 58 Issue 4 Pages 397-402

DOI https://doi.org/10.1508/cytologia.58.397

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Abstract

Karyotypes of seven hemiodid fish species have a similar macrostructure, with 2n=54 and FN=108. The chromosome types range from 24 to 25 M-SM chromosome pairs and from 2 to 3 ST chromosome pairs. The species differ in the karyotypic formulae and the NORs are located on a single pair of ST or SM chromosomes. The results are compared with other characiforms, especially those with a similar karyotypic macrostructures, in order to evaluate the possible derivations of the chromosomal patterns of the group.

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