| General information |
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Geophagus brasiliensis (Quoy & Gaimard, 1824) |
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| Common name | Pearl cichlid |
| Synonyms |
Crenicichla johanna strigata Gunther, 1862 Chromis brasiliensis Quoy & Gaimard, 1824 Chromys unimaculata Castelnau, 1855 Acara gymnopoma Gunther, 1862 Geophagus brasiliensis Kner, 1865 Acara minuta Hensel, 1870 Geophagus tuberosus Gosse, 1976 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Euteleostei; Neoteleostei; Acanthomorpha; Acanthopterygii; Percomorpha; Perciformes; Cichlidae. |
| Geographical distribution |
Taiwan; Brazil; Uruguay |
| Occurrence |
introduced: Taiwan; native: Brazil; native: Uruguay |
| Importance |
Food/ornamental |
| Karyological information |
| Record 1 |
| Geographical area of study |
Olaria stream, Poloni, Sao Paulo, Brazil, Araqua stream, Botucatu, Sao Paulo Brazil, Bonito river, Barra Bonita, Sao Paulo, Brazil, Paraitinguinha river, Salesopolis, Sao Paulo, Brazil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
7 |
| Diploid chromosome number |
48 |
| Karyotype formula |
2m/sm+46st/a |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not detected |
| Chromosome staining/banding/FISH |
Nil |
| Reference |
Poletto AB, Ferreira IA, Cabral-de-Mello DC, Nakajima RT, Mazzuchelli J, Ribeiro HB, Venere PC, Nirchio M, Kocher TD, Martins C (2010). Chromosome differentiation Patterns During Cichlid Fish Evolution. BMC Genetics, 11: 50. |
| Karyology remarks |
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| Record 2 |
| Geographical area of study |
Brotas SP, Sao Carlos-SP, Pirassununga SP, Registro-SP, Brazil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
38 ( 27 males; 11 females) |
| Diploid chromosome number |
48 |
| Karyotype formula |
2m/sm+46st/a |
| Fundamental arm number |
50 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Not reported |
| Reference |
Thompson KW (1979). Cytotaxonomy of 41 species of Neotropical Cichlidae. 4:679-691. |
| Record 3 |
| Geographical area of study |
Not reported |
| Source of chromosomes |
Gill |
| Number of specimens with sex |
16 (08 males; 08 females) |
| Diploid chromosome number |
48 |
| Karyotype formula |
4msm+44stt |
| Fundamental arm number |
52 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
|
| Reference |
Thompson KW (1979). Cytotaxonomy of 41 species of Neotropical Cichlidae. 4:679-691. |
| Record 4 |
| Geographical area of study |
Itabapoana River, Southeast Brazil |
| Source of chromosomes |
Kidney, gills and/or spleen |
| Number of specimens with sex |
1 |
| Diploid chromosome number |
48 |
| Karyotype formula |
- |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
- |
| Reference |
Netto MR de Ca´scia B, Pauls E, Roberto P, Affonso PRA de Mello (2007). A standard protocol for obtaining fish chromosomes under post-mortem conditions. Micron, 38: 214–217. |
| Record 5 |
| Geographical area of study |
Feijão and Pântano stream, São Carlos, São Paulo state, Brazil |
| Source of chromosomes |
Anterior kidney |
| Number of specimens with sex |
18 (7 males and 11 females) |
| Diploid chromosome number |
48 |
| Karyotype formula |
6sm+42st/a |
| Fundamental arm number |
54 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
C-positive bands located in centromeric/pericentromeric regions. The Ag-NORs and 18S rDNA sites were located in the telomeric region of the short arm of st/a pair 6. 5S rDNA sites were located in the interstitial region of the long arm of st/a pair |
| Reference |
Neto MF, de Oliveira C, Foresti F, Nogaroto V, de Almeida MC, Artoni RF, Vicari MR, Moreira-Filho O, (2010). Comparative cytogenetic study among three fish species: an analysis from a water divide region. Publication UEPG Ciencias Biologicas E Da Saúde, 16 (1): 19-28. |
| Cross Link |