Oreochromis

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Oreochromis
O. tanganicae
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Tribe: Oreochromini
Genus: Oreochromis
Günther
, 1889
Type species
Oreochromis hunteri

Günther, 1889

Oreochromis is a large

hypersaline conditions with a salinity that far surpasses that of seawater.[1] In addition to overfishing and habitat loss, some of the more localized species are threatened by the introduction of other, more widespread Oreochromis species into their ranges. This is because they—in addition to competing for the local resources—often are able to hybridize.[1]

Oreochromis are fairly robust fish, and medium–small to very large cichlids that can reach up to 9.4–61 cm (4–24 in) in total length depending on the exact species.[2]

Taxonomy

Species in this genus, as well as those in several other oreochromine and tilapiine genera, share the common name "tilapia" and historically most were included in the genus Tilapia.[1]

Oreochromis contains more than 30

paraphyletic. For example, two Oreochromis species (O. amphimelas and O. esculentus) appear closer to Alcolapia than the remaining Oreochromis, and five other Oreochromis species (O. angolensis, O. lepidurus, O. niloticus, O. schwebischi and O. upembae) appear to be as distant from the "core" Oreochromis as they are from Alcolapia.[1] A potential solution is to merge Alcolapia into Oreochromis,[1] as done by Catalog of Fishes.[4]

Species

The 37 recognized species in this genus are:[2][5]

O. malagarasi
O. placidus
O. saka
O. schwebischi
O. shiranus

Gallery

  • Oreochromis amphimelas of lakes, often saline, in north–central Tanzania
    Oreochromis amphimelas of lakes, often saline, in north–central Tanzania
  • Oreochromis andersonii, a threatened species of south–central Africa
    Oreochromis andersonii, a threatened species of south–central Africa
  • Oreochromis leucostictus of Albertine Rift Valley lakes and introduced elsewhere
    Oreochromis leucostictus of Albertine Rift Valley lakes and introduced elsewhere
  • Oreochromis lidole, a possibly extinct species of the Lake Malawi basin
    Oreochromis lidole, a possibly extinct species of the Lake Malawi basin
  • Oreochromis macrochir, a threatened species of south–central Africa
    Oreochromis macrochir, a threatened species of south–central Africa
  • Oreochromis mossambicus, a widespread species that also is introduced outside its native range
    Oreochromis mossambicus, a widespread species that also is introduced outside its native range
  • Oreochromis niloticus, a very widespread species that also is introduced outside its native range
    Oreochromis niloticus, a very widespread species that also is introduced outside its native range
  • Oreochromis squamipinnis, a threatened species of the Lake Malawi basin
    Oreochromis squamipinnis, a threatened species of the Lake Malawi basin
  • Oreochromis variabilis, a threatened species of the Lake Victoria basin
    Oreochromis variabilis, a threatened species of the Lake Victoria basin
  • Oreochromis alcalica, formerly allocated to Alcolapia
    Oreochromis alcalica, formerly allocated to Alcolapia

Media related to Oreochromis at Wikimedia Commons

References

  1. ^
    PMID 30974200
    .
  2. ^ a b Froese, Rainer and Pauly, Daniel, eds. (2019). Species of Oreochromis in FishBase. September 2019 version.
  3. doi:10.1006/mpev.2001.0979
  4. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Oreochromis". Catalog of Fishes. California Academy of Sciences. Retrieved 11 December 2019.
  5. ^ "Oreochromis". Integrated Taxonomic Information System.
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