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Hydrocynus vittatus in Botswana
Tiger fish

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Hydrocynus vittatus   Castelnau, 1861
Family:	Alestidae (African tetras)			picture (Hyvit_u3.jpg) by Seegers, L.
Order:	Characiformes  (characins)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Tiger fish
Max. size:	105 cm FL (male/unsexed; Ref. 40637); 70 cm FL (female); max. published weight: 28.0 kg (Ref. 40637); max. reported age: 8 years
Environment:	demersal; potamodromous
Climate:	tropical; 22 - 28°C
Global Importance:	fisheries: commercial
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (K=0.20-0.30; tmax=11)
Distribution:	Africa: Niger/Bénoué, Ouémé, Senegal, Nile, Omo, Congo, Lufira, Lualaba, Luapula, Zambeze, Limpopo, Rovuma, Shore, Rufiji , Ruaha, Wami, and Ruvu. Lakes - Bangwéolo, Moéro, Tanganyika, Upemba, Rukwa and Malagarazi. Also Okavango and lower reaches of coastal systems south to Pongolo (Ref. 7248). Also found in Lake Kariba (Ref. 27602).
Diagnosis:	Dorsal spines (total): 2-2; Dorsal soft rays (total): 8-8; Anal spines: 3-3; Anal soft rays: 12-12. Body profile less slender than H. forskalii. Eye < 70% of interorbital space. Long gill rakers. Tips of adipose and dorsal fins black. Forked edge of caudal fin black.
Biology:	Prefers warm, well-oxygenated water, mainly larger rivers and lakes. All but the largest form roving schools of like-sized fish; aptly described as fierce and voracious. Feeds on whatever prey is most abundant but Brycinus, Micralestes, Barbus, and Limnothrissa are favored (Ref. 7248). Useful food fish in some areas (Ref. 4967)
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Paugy, D.. 1990. (Ref. 2880)
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Botswana country information
Common names:	[ No common name ]		Ref:
Status:	native		Ref:  Paugy, D., 1990
Salinity:	freshwater
Uses:	no uses
Comments:	Known from the Okavango Delta in the Nxaraga Lagoon, Xakanixa Lagoon, Magwexana Lagoon, mainstream channel and Dungu Lagoon. Also Ref. 2880.
Country Information:	www.cia.gov/cia/publications/factbook/geos/bc.html
Occurrences:	Occurrences    Point map
Main Ref:	Merron, G.S. and M.N. Bruton, 1995
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More information:	Countries FAO areas Occurrences Introductions Ecosystem Ecology Diet Food items Food consumption Ration Predators Ciguatera Fish loss Common names Synonyms Pictures Sounds Reproduction Maturity Spawning Eggs Egg dev. Larvae Larval dynamics References Growth L-W relationship L-L relationship Length frequencies Recruitment Max. age & size Metabolism Morphology Morphometrics Gill area Brains Vision Collaborators Genetics Allele frequencies Heritability Strains Aquaculture Aquaculture profile Diseases Ecotoxicology Processing Speed Swim. type Stamps
	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Identification keys | Length-frequency Wizard | Life-history tool | Point map |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | PubMed | Recipes | Scirus | Public aquariums | Tree of Life | Zoological Record Other web sites |
	Note: use the Back button of your browser to return to FishBase.
	Modified:  Torres, Armi G.	Entered:  Palomares, Maria Lourdes D.

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
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Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07