General information |
Astyanax lacustris (Lutken, 1875) |
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Common name | Tambiú |
Synonyms |
- |
IUCN Red List status (2014) |
Not Reported |
Habitat |
Freshwater |
Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characidae. |
Geographical distribution |
Brazil |
Occurrence |
native: Brazil |
Remarks |
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Karyological information |
Record 1 |
Geographical area of study |
Sao Francisco River basin, MG, Brazil |
Source of chromosomes |
Kidney and gills |
Number of specimens with sex |
1 (sex non-determined) |
Diploid chromosome number |
50 |
Karyotype formula |
32m/sm+18st/a |
Fundamental arm number |
82 |
Chromosome length |
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Sex chromosome |
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Chromosome staining/banding/FISH |
Ag NORs location: distal end of the short arm of 2 A; 5S probe hybridization: pericentromeric region of 2 M; 28S probe hybridization: distal end of the short arm of 2 A, co-localized with the 5S in the pericentromeric region of 2 M. |
Reference |
Almeida-Toledo LF, Ozouf-Costaz C, Foresti F, Bonillo C, Porto-Foresti F, Daniel-Silvaa MFZ (2002). Conservation of the 5S-bearing chromosome pair and co-localization with major rDNA clusters in five species of Astyanax (Pisces, Characidae). Cytogenet. Genome Res., 97: 229–233.
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Record 2 |
Geographical area of study |
Instituto Chico Mendes de Conservação da Biodiversidade (CEPTA – ICMBIO/ Pirassununga, SP, Brazil. |
Source of chromosomes |
Kidney tissues. |
Number of specimens with sex |
- |
Diploid chromosome number |
50 |
Karyotype formula |
6m+12sm+14st+18a |
Fundamental arm number |
- |
Chromosome length |
- |
Sex chromosome |
- |
Chromosome staining/banding/FISH |
Displayed 18S rDNA signals on two chromosome pair. and 5S rDNA signal on one chromosome pair. |
Reference |
Goes CAG, Daniel SN, Piva LH, Yasui GS, Artoni RF, Hashimoto DT, Foresti F, Porto-Foresti F (2020). Cytogenetic markers as a tool for characterization of hybrids of Astyanax Baird & Girard, 1854 and Hyphessobrycon Eigenmann, 1907. Comp. Cytogen. 14(2): 231–242. |
Cross Link |