Description of the karyotype of Geophagus cf. proximus (Perciformes, Cichlidae, Geophaginae) - doi: 10.4025/actascibiolsci.v35i1.11711

Carlos Alberto Machado da Rocha; Augusto César Paes de Souza; Ramayanna da Silva Rayol; Helem Ferreira Ribeiro

doi:10.4025/actascibiolsci.v35i1.11711

**Description of the karyotype of Geophagus cf. proximus (Perciformes, Cichlidae, Geophaginae)** - doi: 10.4025/actascibiolsci.v35i1.11711

Authors

Carlos Alberto Machado da Rocha Instituto Federal de Educação, Ciência e Tecnologia do Pará Author
Augusto César Paes de Souza Instituto Federal de Educação, Ciência e Tecnologia do Pará Author
Ramayanna da Silva Rayol Instituto Federal de Educação, Ciência e Tecnologia do Pará Author
Helem Ferreira Ribeiro Instituto Federal de Educação, Ciência e Tecnologia do Pará Author

DOI:

https://doi.org/10.4025/actascibiolsci.v35i1.11711

Keywords:

cytogenetic, C-banding, Ag-NOR technique, Geophagus

Abstract

This study described the karyotype of Geophagus cf. proximus. Specimens were collected in Ãgua Preta Lake, Parque Ambiental de Belém, Pará State, Brazil. The karyotype were 2n = 48 chromosomes (FN = 60: 12M/SM+36ST/A) and no sexual chromosome differentiation. C-banding showed centromeric staining in all chromosomes. The first chromosome pair, besides centromeric coloration, presented a totally heterochromatic long arm. The nucleolus organizer regions (NORs) were studied by means of AgNO₃. NORs were located at the short arm of the second chromosome pair.

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Author Biographies

Carlos Alberto Machado da Rocha, Instituto Federal de Educação, Ciência e Tecnologia do Pará

Biólogo, com mestrado em Genética e Biologia Molecular e Doutorado em Biologia Celular, lotado na Coordenação de Recursos Pesqueiros e Agronegócio do IFPa.
Augusto César Paes de Souza, Instituto Federal de Educação, Ciência e Tecnologia do Pará

Biólogo, com mestrado em Zoologia, lotado na Coordenação de Recursos Pesqueiros e Agronegócio do IFPa.
Ramayanna da Silva Rayol, Instituto Federal de Educação, Ciência e Tecnologia do Pará

Bióloga, licenciada pelo Instituto Federal de Educação, Ciência e Tecnologia do Pará.
Helem Ferreira Ribeiro, Instituto Federal de Educação, Ciência e Tecnologia do Pará

Bióloga, com Mestrado em Genética e Biologia Molecular pela Universidade Federal do Pará

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Published

2012-08-28

Issue

Vol. 35 No. 1 (2013)

Section

Genetics

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How to Cite

Description of the karyotype of Geophagus cf. proximus (Perciformes, Cichlidae, Geophaginae) - doi: 10.4025/actascibiolsci.v35i1.11711. (2012). Acta Scientiarum. Biological Sciences, 35(1), 83-87. https://doi.org/10.4025/actascibiolsci.v35i1.11711