| General information |
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Astyanax abramis (Jenyns, 1842) |
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| Common name | Acará-pixuma |
| Synonyms |
Tetragonopterus abramis Jenyns, 1842 |
| 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; Argentina; Peru; Uruguay |
| Occurrence |
native: Brazil; native: Argentina; native: Peru; native: Uruguay |
| Importance |
Food |
| Karyological information |
| Record 1 |
| Geographical area of study |
Bento Gomes river in Mato Grosso state (MT), Brazil |
| Source of chromosomes |
Not reported |
| Number of specimens with sex |
3 |
| Diploid chromosome number |
50 |
| Karyotype formula |
12m+28sm+6st+4a |
| Fundamental arm number |
96 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
Heterochromatic regions were observed mainly in pericentromeric regions; Ag-NORs, GC-rich regions, and 18S rDNA sites were also observed in the secondary constriction of pair 21;5S rDNA sequences were located in the pericentromeric region on the long arms of pairs 2 and 23 |
| Reference |
Piscor D,Alves AL, Parise-Maltempi PP (2015).Chromosomal Microstructure Diversity in Three Astyanax (Characiformes, Characidae) Species: Comparative Analysis of the Chromosomal Locations of the 18S and 5S rDNAs.Zebrafish, 12(1):81-90. |
| Record 2 |
| Geographical area of study |
Miranda river (Corumbá, Mato Grosso do Sul), Brazil. |
| Source of chromosomes |
Kidney and gill cells. |
| Number of specimens with sex |
4 (2 male, 2 female) |
| Diploid chromosome number |
50 |
| Karyotype formula |
|
| Fundamental arm number |
|
| Chromosome length |
|
| Sex chromosome |
|
| Chromosome staining/banding/FISH |
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| Reference |
Carvalho ML, Oliveira C, Navarrete MC, Froehlich O, Foresti F (2002). Nuclear DNA content determination in Characiformes fish (Teleostei, Ostariophysi) from the Neotropical region. Genetics and Molecular Biology, 25(1): 49-55. |
| Cross Link |