| General information |
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Astyanax scabripinnis L. Jenyns, 1842 |
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| Common name | Piaba |
| Synonyms |
Tetragonopterus scabripinnis Jenyns, 1842 Astyanax scabripinnis scabripinnis (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 |
| Occurrence |
native: Brazil; native: Argentina |
| Remarks |
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| Karyological information |
| Record 1 |
| Geographical area of study |
Paranapanema River, Botucatu, Sao Paulo,Brazil. |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
Not reported |
| Diploid chromosome number |
50 |
| Karyotype formula |
8M+18SM+10ST+14A |
| Fundamental arm number |
76 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
C-banding showed heterochromatin blocks on the long arms of chr. 14, 15,17 & 19-25. |
| Reference |
Daniel-Silva MFZ, Almeida Toledo LFD (2001). Chromosome R-banding pattern and conservation of a marker chromosome in four species, genus Astyanax (Characidae, Tetragonopterinae), Caryologia, 54 (3): 209-215. |
| Record 2 |
| Geographical area of study |
Teite River, Brazil |
| Source of chromosomes |
Kidney and gills |
| Number of specimens with sex |
1 female |
| Diploid chromosome number |
50 |
| Karyotype formula |
36 m/sm+ 14st/a |
| Fundamental arm number |
86 |
| Chromosome length |
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| Sex chromosome |
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| Chromosome staining/banding/FISH |
Ag NORs location: distal portion of the short arm of 2 A; 5S probe hybridization: pericentromeric region of 2 M and 2 A; 28S probe hybridization: short arm of 2 A; co-localize in the pericentromeric region of 2 M and 2 A. |
| 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 3 |
| Geographical area of study |
Canta Gala brook, Itirapina SaoPaulo State, Brazil |
| Source of chromosomes |
Short term culture of kidney, gill and intestine. |
| Number of specimens with sex |
38 males annd 43 female |
| Diploid chromosome number |
50 |
| Karyotype formula |
4m+26sm+4st+16t |
| Fundamental arm number |
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| Chromosome length |
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| Sex chromosome |
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| Chromosome staining/banding/FISH |
A close relationship was observed between large telomeric heterochromatic segments and GC-specific fluorochrome bands; FISH analysis indicates that rDNA clusters are not always located on CMA+ (or MM+) bands |
| Reference |
Souza IL, Galian J, De La Rua P, Bertollo LAC, Moreira-Filho O (2001). Non-random Distribution of the GC-rich heterochromatin and nucleolar rDNA sites on Astyanax scabripinnis chromosomes. Cytologia, 66: 85-91.
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