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Hippopotamyrus discorhynchus in Botswana
Zambezi parrotfish

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Hippopotamyrus discorhynchus   (Peters, 1852)
Family:	Mormyridae (Elephantfishes)			picture (Hidis_u0.jpg) by Seegers, L.
Order:	Osteoglossiformes  (bony tongues)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Zambezi parrotfish
Max. size:	31.0 cm SL (male/unsexed; Ref. 4967); max. published weight: 1,100 g (Ref. 7248)
Environment:	demersal
Climate:	tropical; 22 - 24°C; 11°S - 21°S
Global Importance:	fisheries: minor commercial; aquarium: commercial
Resilience:	Medium, minimum population doubling time 1.4 - 4.4 years (K=0.16)
Distribution:	Africa: Upper Congo basin, Lakes Tanganyika, and Malawi, Zambezi and Cubango Rivers (Ref. 3203). Also found in the Cunene, Okavango, Buzi and Pungwe rivers. Occurs also in Lake Bangweulu, Lake Mweru and Save river (Ref. 13337). Absent from the Kafue River (Ref. 7248).
Diagnosis:	Dorsal spines (total): 0-0; Dorsal soft rays (total): 30-36; Anal spines: 0-0; Anal soft rays: 23-27. Chin with fleshy bulge, snout rounded, in front of mouth, eye well above mouth (Ref. 4967). Male develops concavity to the margin of the anal fin, whereas that of female is straight. The high back, with the dorsal fin approximately one third of the total length of the fish, serves to separate it satisfactorily from other mormyrids in Zimbabwe (Ref. 13337).
Biology:	Nocturnal shoaling species; favors large river channels with a soft bottom and fringing vegetation (Ref. 7248). Found mainly in sheltered bays, lagoons and swampy areas. Occurs also in typical sandy or rocky rivers (Ref. 13337). Feeds on insect larvae at night (Ref. 5595). Known to migrate up tributary rivers of Lake Kariba during rainy season, though it is not yet clear whether this is a breeding migration (Ref. 13337). Breeds during the rainy season; females carry up to 5,000 eggs
Threatened:	Not Evaluated, see IUCN Red List  , (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Gosse, J.-P.. 1984. (Ref. 3203)
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Botswana country information
Common names:	[ No common name ]		Ref:
Status:	native		Ref:
Salinity:	freshwater
Regulations:	no regulations		Ref:
Uses:	no uses
Comments:	Found in the Boteti River, Thamalakane River, Nxaraga Lagoon, Xakanixa Lagoon and mainstream channel of the Okavango Delta.
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 | Bio-Quiz | 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 | Tree of Life | Zoological Record Other web sites |
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	Entered:  Torres, Armi G.

	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