Overview

Comprehensive Description

Biology

Occurs in open water habitats. Piscivorous but may also eat Caridina and insects (Ref. 28714). Affinities: easily distinguished from two other species in West Africa from number of scale-rows below lateral line (3 instead of 2).
  • Paugy, D. 1990 Characidae. p. 195-236. 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 et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Distribution

Range Description

This is a wide-ranging species, found from Senegal to Ethiopia, and throughout the Nile.

Northern Africa: It is present but rare in this region. It used to be caught from Lower Egyptian Nile to Luxor, now restricted to Lake Nasser (also known as Lake Nubia).

Northeast Africa: It is found in the Ghazal and Jebel systems, Sudan, as well as Baro River, Ethiopia.

Western Africa: This species is known from Chad, Niger/Bénoué, Volta, Senegal and Gambia.
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Africa: Occurs only in sudano-sahalian basins - Nile, Chad, Niger/Bénoué, Volta, Senegal and Gambia.
  • Paugy, D. 1990 Characidae. p. 195-236. 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 et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Sudan.
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Physical Description

Size

Maximum size: 860 mm ---
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Max. size

86.0 cm TL (male/unsexed; (Ref. 3799)); max. published weight: 8,250 g (Ref. 2880)
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Diagnostic Description

Massive profile specially on anterior part. Eye
  • Paugy, D. 1990 Characidae. p. 195-236. 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 et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)   http://www.fishbase.org/references/FBRefSummary.php?id=2880&speccode=5229 External link.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This is a demersal species, occurring in open water habitats. It feeds mainly on fish, aquatic insects and shrimps.

Systems
  • Freshwater
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Environment

demersal; potamodromous (Ref. 51243); freshwater
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Migration

Potamodromous. Migrating within streams, migratory in rivers, e.g. Saliminus, Moxostoma, Labeo. Migrations should be cyclical and predictable and cover more than 100 km.
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Trophic Strategy

Occurs in open water habitats. Piscivorous but may also eat Caridina and insects (Ref. 28714).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Hydrocynus brevis

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There is 1 barcode sequence available from BOLD and GenBank.

Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen.

Other sequences that do not yet meet barcode criteria may also be available.

CTCTACCTCGTATTTGGTGCTTGAGCCGGCATGGTGGGGACTGCTCTTAGCCTCCTAATTCGAGCGGAACTGAGCCAACCGGGATCCCTCCTGGGAGACGACCAGATTTACAATGTTATTGTTACAGCACATGCATTCGTAATAATCTTTTTTATGGTCATGCCAATTATAATTGGCGGCTTCGGAAACTGACTGGTGCCCCTAATAATTGGTGCCCCCGATATAGCATTCCCGCGAATAAATAATATAAGCTTCTGACTCCTCCCGCCATCCTTCCTTCTTCTTTTAGCCTCTTCAGGGGTGGAAGCAGGGGCAGGAACAGGCTGGACAGTGTACCCCCCTCTCGCTGGGAACCTTGCCCACGCAGGGGCCTCCGTTGACCTAACCATCTTCTCGCTTCACCTTGCAGGAGTCTCTTCAATCCTGGGTGCAATTAACTTCATCACGACCATCATCAACATAAAACCCCCTGCCATCTCACAGTACCAGACCCCTTTGTTCGTGTGAGCCGTTTTAATTACAGCAGTTCTCCTATTGCTCTCCCTCCCTGTCCTAGCTGCAGGCATCACAATGCTTTTAACAGATCGTAACTTAAACACCACCTTCTTTGACCCTGCCGGCGGAGGAGACCCAATTCTTTACCAACACTTG
-- end --

Download FASTA File

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Statistics of barcoding coverage: Hydrocynus brevis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Specimens with Barcodes: 3
Species With Barcodes: 1
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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
Azeroual, A., 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 north eastern and western Africa. It used to be caught from Lower Egyptian Nile to Luxor, now restricted to Lake Nasser, where it is rare, which is outside the northern Africa region, and has therefore been assessed as Regionally Extinct.
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Population

Population
No information available.

Population Trend
Unknown
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Threats

Major Threats
One potential threat to this commercial harvested food fish is overfishing, as well as deforestation and pollution (mining and oil industry). In northern Africa, dams, water pollution (agriculture, domestic and commercial/industrial), groundwater extraction and drought pose possible threats.
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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 research is needed into population range and numbers for this species, as well as monitoring population trends. Habitat maintenance and restoration may also be required.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial
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Wikipedia

Hydrocynus brevis

Hydrocynus brevis, also known as the tigerfish, Nile tigerfish or Sahelian tigerfish, is a predatory freshwater fish distributed throughout Africa.

Appearance[edit]

The tigerfish is silver in colour when young, with thin black horizontal stripes and an elongated body that tapers at both ends. As the fish grows, it will develop a bronze coloration and the stripes will fade. The ventral and caudal fins have a slight red-orange tint, and the adipose fin is grey to black. It grows to a length of 86 centimetres (34 in) SL.[1]

Distribution[edit]

This species has a wide distribution. It is found from Senegal to Ethiopia, throughout the Nile. In Northeast Africa it is found in the Ghazal and Jebel systems, Sudan, as well as Baro River, Ethiopia. In Western Africa it is known from Chad, Niger/Bénoué, Volta, Senegal and Gambia.

Habitat and ecology[edit]

A demersal, potamodromous freshwater species, Hydrocynus brevis prefers open-water habitats. It feeds mainly on fish and shrimps, with smaller individuals consuming aquatic insects.

Population and conservation status[edit]

This species is rather common over most of its range, without any known widespread threats. There is, however, a conservation policy in place in Ghana, and one potential threat is overfishing, as well as deforestation and pollution. There currently is a lack of research regarding the population of the species and its range. Habitat maintenance and restoration may also be required.[2]

Head detail.

References[edit]

  1. ^ "Hydrocynus Brevis (Gunther, 1864)." FishBase. N.p., n.d. Web. 22 Dec. 2013.
  2. ^ "Hydrocynus Brevis." IUCN Red List of Threatened Species. N.p., n.d. Web. 22 Dec. 2013.


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