Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Otomorpha
Subcohors: Ostariophysi
Sectio: Otophysa
Ordo: Characiformes
Familia: Alestidae
Genus: Hydrocynus
Species: H. brevis – H. forskahlii – H. goliath – H. tanzaniae – H. vittatus
References
Hydrocynus species list in FishBase,
Froese, R. & Pauly, D. (eds.) 2022. FishBase. World Wide Web electronic publication, www.fishbase.org, version 08/2021.
Hydrocynus is a genus of large characin fish in the family Alestidae commonly called "tigerfish," native to the African continent. The genus name is derived from Ancient Greek ὕδωρ ("water"[1]) + κύων ("dog"[1]). (In fact, this fish is popularly referred to as poisson chien (dog fish) in French-speaking West Africa.) The genus contains five species,[2] all popularly known as "African tigerfish" for their fierce predatory behaviour and other characteristics that make them excellent game fish.[3] Hydrocynus are normally piscivorous,[4] but H. vittatus is the only freshwater fish proven to prey on birds in flight.[5]
Contents
1 Evolutionary history
2 Species
3 Economic importance
4 Notes and references
Evolutionary history
The earliest fossils which have been identified as belonging to Hydrocynus are dated as Late Miocene, and have been found from the Chad, Maronga, Turkana and Semliki basins of northern and eastern Africa, in all of which Hydrocynus species still occur.[2] The oldest lineage appears to be that of Hydrocynus goliath, while lineages of H. brevis and H. forskahlii diverged in the Late Miocene and Pliocene while the lineages which formed H. tanzaniae and the "vittatus complex" appear in the Pliocene.[2]
Species
Five species of Hydrocynus tigerfish are currently recognised.[6]
Hydrocynus brevis (Günther, 1864) (Tigerfish)
Hydrocynus forskahlii (G. Cuvier, 1819) (Elongate tigerfish)
Hydrocynus goliath Boulenger, 1898 (Giant tigerfish)
Hydrocynus tanzaniae B. Brewster, 1986 (Blue tigerfish)
Hydrocynus vittatus Castelnau, 1861 (Striped tigerfish)
However, recent molecular analysis indicates that there might be up to five more unidentified cryptic species, although more study of the ecology and behaviour is required. This study did not support the treatment of H. vittatus as a synonym of H. forskahlii.[2]
Economic importance
The different species tigerfish are among the most important and popular game fish species in Africa and as a result they are an important asset to the various tourist industries. They are also one of the most important components of commercial freshwater catches in Africa.[7]
Notes and references
Liddell, H.G. & Scott, R. (1940). A Greek-English Lexicon. revised and augmented throughout by Sir Henry Stuart Jones. with the assistance of. Roderick McKenzie. Oxford: Clarendon Press.
Sarah M. Goodier; Fenton P. D. Cotterill; Colleen O'Ryan; Paul H. Skelton & Maarten J. de Wit (2011). "Cryptic diversity of African tigerfish (genus Hydrocynus) reveals palaeogeographic signatures of linked Neogene geotectonic events". PLOS ONE. 6 (12): e28775. Bibcode:2011PLoSO...628775G. doi:10.1371/journal.pone.0028775. PMC 3237550. PMID 22194910.
"Hydrocynus", Encyclopædia Britannica
Kirk O. Winemiller & Leslie C. Kelso-Winemiller (1994). "Comparative ecology of the African pike, Hepsetus odoe, and tigerfish, Hydrocynus forskahlii, in the Zambezi River floodplain" (PDF). Journal of Fish Biology. 45 (2): 211–225. doi:10.1006/jfbi.1994.1121.
"African Tigerfish Recorded Catching Bird Prey in Mid-Flight For First Time Ever (VIDEO)", University Herald, January 13, 2014.
Froese, Rainer and Pauly, Daniel, eds. (2020). Species of Hydrocynus in FishBase. December 2020 version.
"tigerfish". International Game Fish Association. Retrieved 23 December 2016.
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