| General information |
|
Gymnotus arapaima Albert & Crampton, 2001 |
|
| |
|
| Valid name |
Gymnotus arapaima Albert & Crampton, 2001 |
| Synonyms |
- |
| 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 |
Brazil |
| Occurrence |
native: Brazil |
| Remarks |
|
| Karyological information |
| Geographical area of study |
Floodplain channels and lakes in the Mamiraua´ Sustainable Development Reserve (Mamiraua´ Reserve), Amazonas, Brazil |
| Source of chromosomes |
kidney |
| Number of specimens with sex |
12 (10 males and 2 females) |
| Diploid chromosome number |
44 |
| Karyotype formula |
24 m/sm+20st/a |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not reported |
| Chromosome staining/banding/FISH |
The constitutive heterochromatin was present in the pericentromeric regions of the majority of the chromosome pairs. The Ag-NORs, CMA3 positive sites and 18S rDNA sites were located on the short arms of pair 19. |
| Reference |
Milhomem SSR, Crampton WGR, Pieczarka JC, Silva DDS, Cardoso AL, da Silva PC, de Oliveira JA, Nagamachi CY (2012). Chromosomal and electric signal diversity in three sympatric electric knifefish species (Gymnotus, Gymnotidae) from the Central Amazon Floodplain. Reviews in Fish Biology and Fisheries, 22: 485–497. |
| Cross Link |