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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Distribution

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
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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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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 64 - 92; Analsoft rays: 64 - 79; Vertebrae: 58 - 62
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Size

Maximum size: 230 mm SL
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Max. size

23.0 cm SL (male/unsexed; (Ref. 4967))
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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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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
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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Environment

demersal; freshwater
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Trophic Strategy

Inhabits marginal swamps (Ref. 4967). Feeds on plants and benthic invertebrates (Ref. 248).
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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
  • 2006
    Least Concern
    (IUCN 2006)
  • 2006
    Least Concern
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Population

Population
Population not known, but rather rare in fisheries catches.

Population Trend
Unknown
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Threats

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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Least Concern (LC)
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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

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