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Teleostei (teleosts) > Siluriformes (Catfishes) > Claroteidae (Claroteid catfishes) > Auchenoglanidinae
Etymology: Auchenoglanis: Greek, auchen = neck + Greek, glanis = a fish that can eat the bait without touching the hook; a cat fish (Ref. 45335).
More on author: Valenciennes.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal; pH range: 6.5 - 7.8; dH range: ? - 28; potamodromous (Ref. 51243). Tropical; 21°C - 25°C (Ref. 2060)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: most rivers of West Africa (Ref. 57126, 78218), Chad basin (Ref. 3236, 57126), Congo River drainage (Ref. 3236, 78218), Lake Tanganyika (Ref. 78218), Nile system in Ethiopia and Sudan (Ref. 28714, 58460), Lake Turkana drainage, including Omo River (Ref. 3236, 52331, 58460), and Shabeelle (Ref. 3236, 58460).

Length at first maturity / Size / Weight / Age

Maturity: L_m ?, range 39 - ? cm
Max length : 70.0 cm SL male/unsexed; (Ref. 4967)

Short description Morphology | Morphometrics

Dorsal spines (total): 2; Dorsal soft rays (total): 7-8; Anal spines: 3-4; Anal soft rays: 6 - 8. Diagnosis: head width usually less than 2/3 of standard length (Ref. 57126). Snout long and pointed, generally greater than half the head length in adults (Ref. 28714), length more than 0.9 times the head width in adults (less in juveniles) (Ref. 57126). Hind margin of adipose fin rounded; premaxillary dentition forming (in adults) two close-set oval plates (Ref. 57126). Maxillary barbel often blackish and only rarely reaching to anterior margin of opercula (Ref. 57126), usually not reaching beyond eye and much shorter than outer mandibular barbel (Ref. 28714, 81642). 8-12 (usually 10 or 11) gill rakers on lower limb of first gill arch; palatine membrane with multiple invaginations, 1-4 of them forming longer lobes; dorsal margin of cleithral process ending in a point (visible only in adults)(Ref. 57126).

Inhabits lakes and large rivers (Ref. 4967). Has never been observed in large quantities in forested areas (Ref. 57126) but does occur in floodplain swamps (Ref. 28714). Occurs in shallow water with muddy bottom. Omnivore, feeds on plankton, mollusks, seeds, detritus (Ref. 13868), insect larvae, worms and small Crustacea (Ref. 28714). Oviparous (Ref. 205). Nested eggs are guarded by the male parent (Ref. 47642). Furthermore, the male plays host to eggs and young of Dinotopterus cunningtoni which takes advantage of the already prepared nest and feed on the host brood (Ref. 49546). An example of interspecific brood care.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Eggs are brooded and guarded by the male parent (Ref. 47642).

Main reference Upload your references | References | Coordinator | Collaborators

Risch, L.M., 2003. Claroteidae. p. 60-96 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57126)

IUCN Red List Status (Ref. 126983)

Least Concern (LC) ; Date assessed: 30 April 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO - Publication: search | FishSource |

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References
Aquaculture
Aquaculture profile for Auchenoglanis occidentalis' title='Aquaculture profile for Auchenoglanis occidentalis' target='_blank'>Aquaculture profile
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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01023 (0.00556 - 0.01882), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 2.9 ±0.33 se; based on food items.

Generation time: 3.7 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.3).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (38 of 100).

Price category (Ref. 80766): Unknown.

Nutrients (Ref. 124155): Calcium = 95.6 [51.8, 186.1] mg/100g ; Iron = 1.43 [0.86, 2.46] mg/100g ; Protein = 17.2 [16.0, 18.2] % ; Omega3 = 0.402 [0.159, 1.013] g/100g ; Selenium = 77.5 [35.5, 168.4] μg/100g ; VitaminA = 22 [8, 53] μg/100g ; Zinc = 1.46 [0.98, 2.09] mg/100g (wet weight);

Auchenoglanis occidentalis (Valenciennes, 1840)