| General information |
|
Characidium gomesi Travassos, 1956 |
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| Common name | Canivete |
| Synonyms |
|
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Characiformes; Characoidei; Crenuchidae. |
| Geographical distribution |
Brazil |
| Occurrence |
native: Brazil |
| Importance |
Food |
| Karyological information |
| Record 1 |
| Geographical area of study |
Paiol Grande stream, Sao Bento of Sapucai, Brazil |
| Source of chromosomes |
Not reported |
| Number of specimens with sex |
27 (11 males; 16 females) |
| Diploid chromosome number |
50 |
| Karyotype formula |
31m+19sm (Females); 32+18sm (Males) |
| Fundamental arm number |
100 |
| Chromosome length |
Not reported |
| Sex chromosome |
Female karyotype shows a chromosome heteromorphism |
| Chromosome staining/banding/FISH |
NORs are located in the single homologous pair no.18; natural triploidy (2n=3x=75) was also verified in a female specimen showing two Z and one W chromosomes |
| Reference |
Centofante L, Bertollo LAC, Filho OM (2001). Comparative cytogenetics among sympatric species of Characidium (Pisces, Characiformes). Diversity analysis with the description of a ZW sex chromosome system and natural triploidy.Caryologia,54(3): 253-260. |
| Record 2 |
| Geographical area of study |
Pardo River, Brazil. |
| Source of chromosomes |
Renal tissue and gills |
| Number of specimens with sex |
- |
| Diploid chromosome number |
50 |
| Karyotype formula |
32m+18sm |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
Showed ZZ/ZW sex chromosome system. |
| Chromosome staining/banding/FISH |
W and B chromosomes contained completely darkly C-banded. Z chromosome showed a large pericentromeric C-band. Autosomes showed pericentromeric C-bands. |
| Reference |
Pansonato-Alves JC, Serrano E´A, Utsunomia R, Camacho JPM, Costa Silva GJd, et al. (2014). Single origin of sex chromosomes and multiple origins of B chromosomes in fish genus Characidium. PLoS ONE 9(9): e107169. doi:10.1371/journal.pone.0107169. |
| Cross Link |