Astyanax paranae ';
General information
 
Astyanax paranae (Eigenmann, 1914)
 
 
Common nameAlambari
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 Capivara River, Tieteˆ River basin, Botucatu, Sao Paulo, Brazil.
Source of chromosomes
Kidney tissue, gills.
Number of specimens with sex
50 (18 male, 32 female)
Diploid chromosome number
50
Karyotype formula
8m+12sm+14st+16a
Fundamental arm number
84
Chromosome length
-
Sex chromosome
-
Chromosome staining/banding/FISH
Faint C bands present in some A and in B chromosomes, while strong bands present in terminal region of long arms of acrocentric pairs 18–22. Ag-NORs showed intra-population variation with pair No. 12 showed principal NOR, and pair No. 2 sometimes Ag-NOR positive. No Ag-NORs observed in B chromosomes. 18S rDNA signal present on short arm of chromosome pair No. 12. 5S rDNA located in pericentromeric region of pair nos. 2 and 20.
Reference(s)
Silva DMZdA, Pansonato-Alves JC, Utsunomia R, Araya-Jaime C, Ruiz-Ruano FJ, et al. (2014) Delimiting the origin of a B Chromosome by FISH mapping, chromosome painting and DNA sequence analysis in Astyanax paranae (Teleostei, Characiformes). PLoS ONE 9(4): e94896
Karyotype /Metaphase complement image