Table of Contents
Overview
Comprehensive Description
Biology
Found in lakes and rivers. Feeds mainly on insects, consisting of larval and adult aquatic Coleoptera, terrestrial insects, chironomid larvae and larvae of Povilla, culicines and hydroptilids. Also feeds on ostracods, gastropods, plants, copepods and Hydracarina (Ref. 248).
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Teugels, G.G. 1986 A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)
http://www.fishbase.org/references/FBRefSummary.php?id=248&speccode=237
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Distribution
East central Africa: Lakes Victoria, Kioga, Edward and Tanganyika and upper Nile River
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Africa: Lakes Victoria, Kyoga, Edward and Tanganyika. Reported from Bahr el Jebel in Sudan (Ref. 28714).
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Teugels, G.G. 1986 Clariidae. p. 66-101. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels, MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 3820)
http://www.fishbase.org/references/FBRefSummary.php?id=3820&speccode=8366
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Range Description
This species is found from Sudan to Tanzania.
Eastern Africa: This species is known from Lakes Victoria, Kyoga, Edward and George. It is also present in Victoria Nile and their affluent streams and rivers such as Nabugabo, Kachera, Nakivali and Kijanebarola. Also in Malagarasi river (De Vos et al. 2001) and Rusizi River.
Northeast Africa: It is found in Bahr el Jebel, Sudan
Eastern Africa: This species is known from Lakes Victoria, Kyoga, Edward and George. It is also present in Victoria Nile and their affluent streams and rivers such as Nabugabo, Kachera, Nakivali and Kijanebarola. Also in Malagarasi river (De Vos et al. 2001) and Rusizi River.
Northeast Africa: It is found in Bahr el Jebel, Sudan
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Physical Description
Morphology
Dorsal spines (total): 0; Dorsal soft rays (total): 64 - 92; Analsoft rays: 64 - 79; Vertebrae: 58 - 62
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Teugels, G.G. 1986 A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)
http://www.fishbase.org/references/FBRefSummary.php?id=248&speccode=237
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Size
Max. size
23.0 cm SL (male/unsexed; (Ref. 4967))
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Eccles, D.H. 1992 FAO species identification sheets for fishery purposes. Field guide to the freshwater fishes of Tanzania. Prepared and published with the support of the United Nations Development Programme (project URT/87/016). FAO, Rome. 145 p. (Ref. 4967)
http://www.fishbase.org/references/FBRefSummary.php?id=4967&speccode=11098
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Diagnostic Description
Pectoral fin spine serrated on both inner and outer sides (Ref. 34290). Head pointed in dorsal outline; snout short and slightly rounded; eyes more dorsally located. Frontal fontanelle short and squat (`sole-shaped') or intermediate between `sole-shaped' and `knife-shaped'; occipital fontanelle long and oval-shaped. The `dermosphenotic' and supraorbital joined. Tooth plates small. gill rakers long, slender and distantly set. Suprabranchial organ well developed. Openings of secondary canals regularly arranged along flanks.
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Teugels, G.G. 1986 A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)
http://www.fishbase.org/references/FBRefSummary.php?id=248&speccode=237
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Ecology
Habitat
Habitat and Ecology
Habitat and Ecology
Systems
This species inhabits lakes and rivers (Teugels 1986), marginal swamps marginal grass areas and papyrus swamps (Eccles 1992). It is mainly insectivorous (larval and adult aquatic Coleptera, terrestrial insects, Povilla, chironomid larvae). Other food items included ostracoda, gastropods, plants, copepoda and Hydracarina (Teugels 1986).
Systems
- Freshwater
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Trophic Strategy
Inhabits marginal swamps (Ref. 4967). Feeds on plants and benthic invertebrates (Ref. 248).
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Teugels, G.G. 1986 A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)
http://www.fishbase.org/references/FBRefSummary.php?id=248&speccode=237
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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
Getahun, A. & Hanssens, M.
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 enough distribution, with no known major widespread threats to qualify as Least Concern. It has also been assessed regionally as Least Concern for eastern Africa. Due to limited information on this species distribution, abundance and threats, it has been categorised as Data Deficient in northeast Africa.
History
- 2006Least Concern(IUCN 2006)
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Trends
Population
Population
Population Trend
Population not known, but rather rare in fisheries catches.
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
Loss of swamps and other wetlands around lakes and rivers due to farming extension is a threat to this species in eastern Africa. Further threats are unknown.
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Management
Conservation Actions
Conservation Actions
No information available. Population trends need monitoring, and habitat maintenance and conservation my be required.
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Wikipedia
Werner's catfish
Werner's catfish (Clarias werneri) is a species of airbreathing catfish. It is found in Burundi and Tanzania. Its natural habitats are rivers and freshwater lakes. It is threatened by habitat loss. This species reaches a length of 23.0 cm (9.1 inches) SL.
References
- Hanssens, M. 2005. Clarias werneri. 2006 IUCN Red List of Threatened Species. Downloaded on 4 August 2007.
- Froese, Rainer, and Daniel Pauly, eds. (2011). "Clarias werneri" in FishBase. December 2011 version.
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