| General information |
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Trachydoras paraguayensis (Eigenmann & Ward, 1907) |
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| Common name | Rique-rique |
| Synonyms |
Hemidoras paraguayensis Eigenmann & Ward, 1907 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Doradidae. |
| Geographical distribution |
Brazil; Argentina |
| Occurrence |
native: Brazil; native: Argentina |
| Importance |
Food |
| 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 |
56 |
| Karyotype formula |
32M+20SM+4ST |
| Fundamental arm number |
108 |
| 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 |
Iguaçu River (downstream Iguaçu falls), Middle Paraná River basin, Brazil. |
| Source of chromosomes |
- |
| Number of specimens with sex |
16 (7 male, 9 female) |
| Diploid chromosome number |
56 |
| Karyotype formula |
36m+16sm+4st |
| Fundamental arm number |
112 |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Pale heterochromatic blocks found mainly in telomeric regions of some chromosomes. Additional interstitial C-band observed in p-arm of metacentric pair 8 and q-arm of metacentric pair 11, submetacentric pair 19, and subtelocentric pair 27. One pair NORs located interstitially in q-arm of metacentric pair 11 that corresponds to C-band positive block and 18S rDNA probe signals. 5S rDNA showed 2 syntenic signals in pericentromeric region of p-arm and interstitial-medial region of q-arm of pair 22. |
| Reference |
Baumgärtner L, Paiz LM, Margarido VP, Portela-Castro ALB (2016). Cytogenetics of the thorny catfish Trachydoras paraguayensis (Eigenmann & Ward, 1907), (Siluriformes, Doradidae): Evidence of pericentric inversions and chromosomal fusion. Cytogenet. Genome Res.,149: 201-206. |
| Cross Link |