Oreochromis karongae

Oreochromis karongae
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cichliformes
Family: Cichlidae
Genus: Oreochromis
Species:
O. karongae
Binomial name
Oreochromis karongae
(Trewavas, 1941)
Synonyms
  • Tilapia karongae Trewavas, 1941
  • Sarotherodon karongae (Trewavas, 1941)

Oreochromis karongae is a critically endangered species of cichlid that is endemic to Lake Malawi, Lake Malombe, and upper and middle Shire River in Malawi, Mozambique, and Tanzania.[1] This species is important to local commercial fisheries,[2] but has declined drastically due to overfishing.[1]

It can reach a total length of 42 centimetres (17 in).[2] Breeding males are black with white edges to the fins and are extremely similar to breeding male O. lidole, while females are more yellowish-brown than females of O. lidole and O. squamipinnis.[3][4]

It is part of the subgenus Nyasalapia, which are known as chambo. A taxonomic review recommended that O. saka should be considered a synonym of O. karongae (the two only differ by pharyngeal bones and teeth),[5] but at present both are considered valid by FishBase.[6]

The breeding males of chambo have long genital tassels that somewhat resemble fish eggs. During breeding, the female attempts to pick them up with her mouth and this helps the male in fertilizing the female's eggs, already in her mouth.[3][4] O. karongae mainly feeds on phytoplankton, including diatoms.[3]

The lepidophagous cichlid Corematodus shiranus is an aggressive mimic of chambo in both color pattern and swimming mode. It is, therefore, able to approach unsuspecting schools of chambo and rapidly take a mouthful of scales or fin.[3][7]

References

  1. ^ a b c Kanyerere, G.Z.; Phiri, T.B.; Shechonge, A. (2018). "Oreochromis karongae". IUCN Red List of Threatened Species. 2018: e.T61293A148647939. doi:10.2305/IUCN.UK.2018-2.RLTS.T61293A148647939.en.
  2. ^ a b Froese, Rainer; Pauly, Daniel (eds.). "Oreochromis karongae". FishBase. April 2017 version.
  3. ^ a b c d Konings, Ad (1990). Ad Konings' Book of Cichlids and all the other Fishes of Lake Malawi, pp. 90 & 343. ISBN 978-0866225274.
  4. ^ a b Oliver, M.K. (29 August 2016). Oreochromis (Nyasalapia) karongae. MalawiCichlids. Retrieved 13 April 2017.
  5. ^ Turner, G.F.; and R.L. Robinson (1991). Ecology, morphology and taxonomy of the Lake Malawi Oreochromis (Nyasalapia) species flock. Annales de la Musée royal de l'Afrique Centrale (Tervuren) 262: 23-28.
  6. ^ Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Oreochromis". FishBase. April 2017 version.
  7. ^ Oliver, M.K. (16 November 2000). Corematodus shiranus. MalawiCichlids. Retrieved 13 April 2017.


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