General information
Astyanax lacustris (Lutken, 1875)  
   
Common nameTambiú
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
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
Sex chromosome
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.
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
Acknowledgment | Contact us | Disclaimer| FisOmics
Copyright © 2014 ICAR-National Bureau of Fish Genetic Resources, Lucknow.