Overview

Comprehensive Description

Biology

Maximum TL was recorded at 70 cm (Ref. 7094). Prefers flowing water. Feeds on vegetation and periphyton (Ref. 28714).
  • Gosse, J.-P. and E.J. Coenen 1990 Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)   http://www.fishbase.org/references/FBRefSummary.php?id=2936&speccode=5254 External link.
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Distribution

Range Description

This is a wide ranging species from Senegal to Ethiopia.

Northeast Africa: It is known from the White Nile and Lake Roseires, Sudan, as well as the Blue Nile and Baro River, Ethiopia.

Western Africa: It occurs in the basins of the Senegal, Gambia, Niger (down-river from Bamako), Volta, as well as in the Chad. Unlike D. rostratus, its distribution area does not include the lower course of the Volta and other coastal basins located between Gambia and the Niger.
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Africa: Sudanian species - Senegal, Gambia, Niger (downstream from Bamako), Volta, Chad. Unlike Distichodus rostratus, it is not found in the lower basins of the Volta and other coastal basins between Gambia and Niger. Also found in the White Nile.
  • Gosse, J.-P. and E.J. Coenen 1990 Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)   http://www.fishbase.org/references/FBRefSummary.php?id=2936&speccode=5254 External link.
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Africa.
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Physical Description

Morphology

Dorsal soft rays (total): 19 - 24; Analsoft rays: 13 - 16
  • Gosse, J.-P. and E.J. Coenen 1990 Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)   http://www.fishbase.org/references/FBRefSummary.php?id=2936&speccode=5254 External link.
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Size

Maximum size: 590 mm SL
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Max. size

59.0 cm SL (male/unsexed; (Ref. 2936)); max. published weight: 6,000 g (Ref. 7094)
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Diagnostic Description

Body depth 2.2-3.6x, head length 3.2-4.7x SL. Caudal peduncle 0.7-0.9x longer than wide. Snout round. Eye diameter 3.6-6.7x head length. Scaly caudal fin with round lobes. Gray body, dark back, light sides and whitish belly. Eye reddish. Black inter-radial membranes of dorsal fin forming irregularly aligned patterns. Young with round or vertically elongated spots irregularly scattered on sides; orange spot on chin.
  • Gosse, J.-P. and E.J. Coenen 1990 Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)   http://www.fishbase.org/references/FBRefSummary.php?id=2936&speccode=5254 External link.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species prefers flowing water, and feeds on vegetation and periphyton (Holden and Reed 1972)

Systems
  • Freshwater
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Environment

demersal; freshwater
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Trophic Strategy

Prefers flowing water. Feeds on vegetation and periphyton.
  • Gosse, J.-P. and E.J. Coenen 1990 Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)   http://www.fishbase.org/references/FBRefSummary.php?id=2936&speccode=5254 External link.
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Entsua-Mensah, M., Getahun, A. & Lalèyè, P.

Reviewer/s
Snoeks, J., Tweddle, D., Getahun, A., Lalèyè, P., Paugy, D., Zaiss, R., Fishar, M.R.A & Brooks, E.

Contributor/s

Justification
This species has a wide distribution, with no known major widespread threats. It is therefore listed as Least Concern. It has also been assessed regionally as Least Concern for western Africa, but nevertheless locally threatened by oil spills in Nigeria, aquatic weeds in the Volta basin and possible dam construction in the Senegal and Niger basins. Insufficient information is known on the species distribution in north eastern Africa, and it has been categorized as Data Deficient.
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Population

Population
No information available.

Population Trend
Unknown
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Threats

Major Threats
Threats to this fish species may stem from deforestation and bad agricultural practices in the areas of these northern basins, and the resultant increases in sediment loads. Heavy fishing practices and oil drilling may also affect some populations.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There is a conservation policy in place in Ghana (Inland fisheries policy; Wetlands Management Strategy). More policy-based action should be put in place, as well as population trend monitoring, and the maintenance of this species habitats.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial
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