| General information |
|
Gymnotus carapo Linnaeus, 1758 |
|
| |
|
| Common name | Banded knifefish |
| Synonyms |
Gymnotus fasciatus Pallas, 1769 Gymnotum fasciatum Pallas, 1769 Gymnotus albus Pallas, 1769 Gymnotum album Pallas, 1769 Gymnotus brachiurus Bloch, 1786 Gymnotus putaol Lacepede, 1800 Carapus macrourus Cuvier, 1870 Sternopygus carapus Gunther, 1870 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Gymnotiformes; Gymnotoidei; Gymnotidae. |
| Geographical distribution |
Mexico; Brazil; Argentina; Peru; Venezuela; Ecuador; Uruguay; Suriname; French Guiana; Guatemala; Trinidad and Tobago |
| Occurrence |
native: Mexico; native: Brazil; native: Argentina; native: Peru; native: Venezuela; native: Ecuador; native: Uruguay; native: Suriname; native: French Guiana; native: Guatemala; native: Trinidad and Tobago |
| Importance |
Food/Ornamental |
| Karyological information |
| Record 1 |
| Geographical area of study |
Parana - Plata river basin, Argentina |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
Not reported |
| Diploid chromosome number |
54 |
| Karyotype formula |
Not reported |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
|
| Reference |
Fenocchio AS, Pastori MC, Roncati HA, Filho OM, Bertollo LAC (2003). A Cytogenetic Survey of the Fish Fauna from Argentina. Caryologia, 56(2): 197-204. |
| Record 2 |
| Geographical area of study |
Miranda - Pantanal-MS River, Brazil |
| Source of chromosomes |
Not reported |
| Number of specimens with sex |
05 |
| Diploid chromosome number |
54 |
| Karyotype formula |
38m+12sm+4st |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
The C-banding technique revealed centromeric marks in all chromosomes. NORs were localised on first chromosome pair, as revealed by silver staining and hybridization with 18S rDNA probes. The 5S rDNA probes revealed signals on fifteen pairs. |
| Reference |
Scacchetti PC, Pansonato-Alves JC, Utsunomia R, Oliveira C, Foresti F (2011). Karyotypic diversity in four species of the genus Gymnotus Linnaeus, 1758 (Teleostei, Gymnotiformes, Gymnotidae): physical mapping of ribosomal genes and telomeric sequences. Comparative Cytogenetics, 5(3): 223–235. |
| Record 3 |
| Geographical area of study |
Feijão and Pântano stream, São Carlos, São Paulo state, Brazil |
| Source of chromosomes |
Anterior kidney |
| Number of specimens with sex |
Twenty specimens (11 males and 9 females) |
| Diploid chromosome number |
54 |
| Karyotype formula |
44m+8sm+2st/a |
| Fundamental arm number |
106 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
C-bands on centromeric/pericentromeric region of all chromosomes. The NORs and 18S rDNA positive FISH sites were localized on short arm of the first pair of metacentric chromosomes. The 5S rDNA positive FISH sites were located in pericentromeric region of all chromosomes. |
| Reference |
Neto MF, de Oliveira C, Foresti F, Nogaroto V, de Almeida MC, Artoni RF, Vicari MR, Moreira-Filho O, (2010). Comparative cytogenetic study among three fish species: an analysis from a water divide region. Publication UEPG Ciencias Biologicas E Da Saúde, 16 (1): 19-28. |
| Cross Link |