Overview
Comprehensive Description
Biology
Maximum TL was recorded at 50 cm. Prefers flowing water over rocky bottoms (Ref. 7094). Feeds on vegetation and periphyton (Ref. 28714).
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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
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Distribution
Africa: Niger (downstream of Bamako), Volta, Ogun, Cross, Chad basin, Wouri and Nile. Also known from Senegal (Ref. 7094).
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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
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Range Description
This species is patchily distributed from Guinea to Ethiopia.
Central Africa:In Lower Guinea, Distichodus engycephalus occurs in the Cross River basin, Cameroon.
Northern Africa: This species used to be caught from the Nile at Cairo, but is now Regionally Extinct.
Northeast Africa: It is found in the Jebel system, White Nile, Sudan, as well as Baro River, Ethiopia.
Western Africa: It is known from the Niger, Volta, Ogun, Cross and Chad basins, also known from Sénégal (Daget and Gosse 1984).
Central Africa:In Lower Guinea, Distichodus engycephalus occurs in the Cross River basin, Cameroon.
Northern Africa: This species used to be caught from the Nile at Cairo, but is now Regionally Extinct.
Northeast Africa: It is found in the Jebel system, White Nile, Sudan, as well as Baro River, Ethiopia.
Western Africa: It is known from the Niger, Volta, Ogun, Cross and Chad basins, also known from Sénégal (Daget and Gosse 1984).
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Physical Description
Morphology
Dorsal soft rays (total): 22 - 27; Analsoft rays: 13 - 16
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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
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Size
Max. size
40.0 cm SL (male/unsexed; (Ref. 2936)); max. published weight: 1,500 g (Ref. 3799)
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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
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Ita, E.O. 1984 Kainji (Nigeria). p. 43-103. In J.M. Kapetsky and T. Petr (eds.) Status of African reservoir fisheries. CIFA Tech. Pap. 10:326 p. (Ref. 3799)
http://www.fishbase.org/references/FBRefSummary.php?id=3799&speccode=376
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Diagnostic Description
Body depth 2.6-3.4x, head length 4-5.4x SL. Caudal peduncle length
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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
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
Distichodus engycephalus is a demersal species which prefers flowing water over rocky bottoms. Distichodus engycephalusfeeds on diatoms, filamentous algae, insects and plant material.
Systems
- Freshwater
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Trophic Strategy
Prefers flowing water over rocky bottoms. Feeds on vegetation and peripython.
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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
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Molecular Biology and Genetics
Molecular Biology
Barcode data: Distichodus engycephalus
The following is a representative barcode sequence, the centroid of all available sequences for this species.

There are 3 barcode sequences available from BOLD and GenBank. Below is a 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 and other sequences.
Download FASTA File
There are 3 barcode sequences available from BOLD and GenBank. Below is a 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 and other sequences.
CCTTTATATCGTATTCGGTGCTTGAGCCGGAATAGTTGGAACCGCTTTGAGCCTTTTAATCCGAGCGGAACTTGGCCAACCCGGATCCTTATTAGAAGACGACCAAATCTACAATGTACTTGTCACTGCACACGCTTTTGTGATAATCTTCTTTATAGTAATGCCAATTATGATCGGAGGATTTGGAAACTGACTAATTCCCCTAATAATTGGTGCCCCAGACATAGCATTCCCTCGAATAAATAATATAAGCTTCTGACTTTTACCACCTTCCTTTCTCCTCCTGCTAGCCTCTTCAGGGGTTGAACAAGGAGCAGGGACAGGCTGAACCGTGTATCCCCCTCTTGCAGGAAATCTAGCTCACGCAGGTGCATCCGTAGATTTAACAATTTTCTCCCTACACCTAGCAGGGGTGTCCTCAATTTTAGGTGCAATCAACTTCATCACAACAATTATTAATATAAAACCGCCCGCAATTTCTCAATACCAAACACCATTATTTGTTTGAGCCGTTTTAGTAACGGCCGTACTTCTACTCCTATCCCTACCTGTCCTTGCTGCAGGAATTACAATGCTTTTAACAGATCGAAATTTAAACACCACATTCTTTGATCCCGCAGGAGGAGGAGACCCAATCCTCTACCAACACTTA
-- end --
-- end --
Download FASTA File
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Statistics of barcoding coverage: Distichodus engycephalus
Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 4
Species With Barcodes: 1
Public Records: 4
Specimens with Barcodes: 4
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. & Moelants, T.
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. The species used to be found in the lower Nile and was caught at Cairo. It is now Regionally Extinct in north Africa, most likely due to the construction of the Aswan High Dam (completed 1970) which has changed the flow regime of the Nile. There is no immigration from outside the region. It is estimated that less than 5 % of the species is found in the central Africa region and it is therefore categorised as Not Applicable.
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Trends
Population
Population
Population Trend
No information available.
Population Trend
Unknown
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Threats
Least Concern (LC)
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IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
http://www.fishbase.org/references/FBRefSummary.php?id=57073
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Major Threats
In certain regions, overfishing, drought, dam construction and aquatic weeds have a large impact on the species. In Ghana this is a commercially harvested food fish, and thus overfishing is a potential threat. Deforestation and bad agricultural practices may pose potential threats to the habitats of this species. Increasing farming activities in these northern basins may also result in increasing levels of pesticides and other agrochemicals that leach into the water bodies and pose threats to the health of the fish. These two threats are especially relevant in the Black Volta. Another threat is pollution of the water bodies from inadequately treated human waste, for in many of these areas, water bodies are ultimately the receptacles for domestic waste. In the Oti, one major threat is aquatic weeds, which alter the habitat of the fish and may affect all sorts of things such as oxygen levels. In extreme cases, excessive proliferation of aquatic weeds may lead to massive fish kills. In the White Volta, effluents from mining activities may also pose a threat to this fish species. Increasing farming activities may also result in increasing levels of pesticides and other agrochemicals that leach into the water bodies and pose threats to the health of the fish. Another major threat is pollution of the water bodies by inadequately treated human waste and by domestic discharges arising from increasing residential developments (Entsua-Mensah 1996).
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Management
Conservation Actions
Conservation Actions
None known. Policy-based actions are required for this species, along with population trend monitoring and habitat maintenance.
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