>
Siluriformes (Catfishes) >
Clariidae (Airbreathing catfishes)
Etymology: Clarias: Greek, chlaros = lively, in reference to the ability of the fish to live for a long time out of water.
More on author: Castelnau.
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce; saumâtre démersal; potamodrome (Ref. 51243). Tropical; 11°S - 27°S
Africa: Quanza, Cunene, Okavango, Chobe, Lake Ngami, upper Zambezi (above Victoria Falls), Kafue, Lake Malawi, upper Lualaba, Luapula, Lakes Moero and Bangweulu, Pungwe, Buzi, Save, Limpopo, Incomati, lower Pongolo and lower Sabi/Lundi system (Ref. 248). Also reported from the lower Shire (Ref. 7248, 52193)
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 73.0 cm TL mâle / non sexé; (Ref. 52193); poids max. publié: 4.0 kg (Ref. 52193)
Épines dorsales (Total) : 0; Rayons mous dorsaux (Total) : 56 - 62; Épines anales: 0; Rayons mous anaux: 50 - 58; Vertèbres: 56 - 60. Diagnosis: Characterized by a relatively long vomerine tooth plate (5.9-14.4% of head length) and by a relatively short adipose fin (5.9-12.5% of standard length), the length of which is a specific character of Clarias ngamensis; head oval to rectangular in dorsal outline; frontal fontanelle long and narrow (`knife-shaped'); occipital fontanelle small and oval-shaped; pectoral spine robust and slightly curved; the suprabranchial organ consists of well developed arborescent structures (Ref. 248). It is distinguished from Clarias gariepinus by having a short adipose fin behind the rayed dorsal and an ovoid vomerine toothplate with granular or blunt teeth (Ref. 52193).
Facultative air-breathing (Ref. 126274); The species seems to be nowhere especially abundant but is fairly common in some areas such as weed beds, permanent swamps, quieter waters and muddy bottoms (Ref. 248, 5595). Prefers vegetated habitats. Feeding habits overlap considerably with the sharptooth catfish. Important foods are mollusks, terrestrial and aquatic insects, insect larvae, shrimps, grain, crabs and fish (Ref. 4967, 78218). Feeds on snails (Ref. 5595). Hard-shelled foods such as mussels are crushed before they are swallowed. Breeds during the summer rainy season. May live for 5-6 years (Ref. 7248). Also caught with drawnets (Ref. 4967).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves
Breeding is reportedly flood dependent and similar to that of C. gariepinus.
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)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: commercial; Aquaculture: commercial; pêche sportive: oui; Aquarium: Commercial
Outils
Articles particuliers
Télécharger en XML
Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00759 (0.00389 - 0.01479), b=2.99 (2.82 - 3.16), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 4.3 ±0.5 se; based on diet studies.
Résilience (Ref.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.22-0.41).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (36 of 100).
Nutrients (Ref.
124155): Calcium = 29.1 [14.5, 133.1] mg/100g; Iron = 1.04 [0.62, 1.87] mg/100g; Protein = 17.2 [16.1, 18.2] %; Omega3 = 0.137 [0.066, 0.309] g/100g; Selenium = 90.7 [37.8, 217.9] μg/100g; VitaminA = 15.2 [5.6, 41.2] μg/100g; Zinc = 0.547 [0.403, 0.741] mg/100g (wet weight);
