Oreochromis

Oreochromis squamipinnis

Oreochromis (from gr óreios " mountain dweller ", and chromis, an old generic names of different fish, in Cuvier were the names of cichlids " Chromides ") is a genus of fish belonging to the family of cichlids ( Cichlidae ). Until very recently, Oreochromis as well as the Sarotherodon species for the genus Tilapia.

Occurrence

Oreochromis species occur in lakes and rivers in Western and Eastern Africa. Meanwhile, they are found worldwide in aquaculture systems and suspended in warm subtropical lakes and rivers, where they displace the native fish in part.

Features

They reach lengths of five centimeters to half a meter and are of quite different shape. From the closely related genus Tilapia they differ by a larger number of gill rakers on the lower limb of the first gill arch and other skull and jaw features. All Oreochromis species are ovophile mouth brooders, meaning one parent takes the fertilized eggs in her mouth and carries it around with him. The clutch consists of mostly 60 to 80, with some species also contain up to 1000 eggs. They are in most cases a mother's family ( the male does not participate in brood care ), a rare parent family ( the male participates in brood care ).

Etymology

Günther, who suggested the name Oreochromis, created the name for the new species O. hunteri, he had received from the Kilimanjaro region. He saw the similarity to the known at this time other cichlid genera Chromis and Hemichromis, but put four hard jets in the anal fin Determine why he proposed a new generic name because of the occurrence area of the new species, which translates as " mountain -chromis" is ( of gr óreios " mountain dweller ", and chromis ). That most of today counted to Oreochromis species not necessarily occur in mountainous areas, is insignificant for the naming.

System

  • Genus Oreochromis ( Hilgendorf, 1905), more than 30 types: Oreochromis amphimelas ( Günther, 1894)
  • Oreochromis andersonii ( Castelnau, 1861)
  • Oreochromis angolensis ( Trewavas, 1973)
  • Oreochromis aureus ( Steindachner, 1864)
  • Oreochromis chungruruensis ( Ahl, 1924)
  • Oreochromis esculentus (Graham, 1928)
  • Oreochromis hunteri ( Günther, 1889)
  • Oreochromis ismailiaensis ( Mekkawy, 1995)
  • Oreochromis karomo (Poll, 1948)
  • Karongae Oreochromis ( Trewavas, 1941)
  • Oreochromis Lepidurus ( Boulenger, 1899)
  • Leucostictus Oreochromis ( Trewavas, 1933)
  • Lidole Oreochromis ( Trewavas, 1941)
  • Oreochromis macrochir ( Boulenger, 1912)
  • Malagarasi Oreochromis ( Trewavas, 1983)
  • Mortimeri Oreochromis ( Trewavas, 1983)
  • Mozambique tilapia ( Oreochromis mossambicus ) (Peters, 1852)
  • Mweruensis Oreochromis ( Trewavas, 1983)
  • Nile tilapia ( Oreochromis niloticus ) (Linnaeus, 1758)
  • Placidus Oreochromis ( Trewavas, 1941)
  • Oreochromis rukwaensis ( Hilgendorf & Pappenheim, 1903)
  • Oreochromis salinicola (Poll, 1948)
  • Oreochromis schwebischi ( Sauvage, 1884)
  • Oreochromis shiranus ( Boulenger, 1897)
  • Oreochromis spilurus ( Günther, 1894)
  • Oreochromis squamipinnis ( Günther, 1864)
  • Oreochromis tanganicae ( Günther, 1894)
  • Oreochromis upembae ( Thys van den Audenaerde, 1964)
  • Oreochromis urolepis (Norman, 1922)
  • Victoria Tilapia ( Oreochromis variabilis ) ( Boulenger, 1906)
Tilapia (genus) Ethelwynn Trewavas FishBase
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