General information |
||
| Astyanax paranae (Eigenmann, 1914) | ||
| Common name | Alambari | |
| 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 |
|
| Importance | ||
| Remarks | B chromosomes observed in 100% cells of 12 females and 01 male. No individual carried more than one B chromosome per cell. |
|
Karyological information |
||
| Geographical area of study | Pindorama and Lopei streams (upper Paraná river basin), Brazil. | |
| Source of chromosomes | Anterior kidney cells. |
|
| Number of specimens with sex | 26 (10 male, 16 female) |
|
| Diploid chromosome number | 48 |
|
| Karyotype formula | 8m+20sm+10st+10a |
|
| Fundamental arm number | - |
|
| Chromosome length | - |
|
| Sex chromosome | - |
|
| Chromosome staining/banding/FISH | In Pindorama stock, AgNORs present terminally in long arm of chromosomes pairs 3, 5, 18 and in pairs 15, 16, 19 and bitelomerics on pair 4. In Lopei stock, AgNORs found terminally on long arm of chromosome pairs 3, 14 and in short arm in chromosome pairs 15, 19 and in short arm in pair 16. C-bands observed as small centrometric marks in chromosome pairs 3, 4, 5, 8, 13, 15, 16, 18, 19 in Pindorama stock, and pairs 2, 3, 8, 9, 10, 15, 16 in Lopei stock, and associated with NORs in both stocks. |
|
| Reference(s) |
Yano CF, Filho OM, Margarido VP (2014). Interpopulational comparative cytogenetics analysis among three Astyanax (Characiformes: Incertae Sedis) species of two streams of upper Paraná River basin, Brazil. Biologia (Section Zoology), 69/6: 790—798. |
|