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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: Günther.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal; potamodroom (Ref. 51243). Tropical; 9°N - 3°N
Africa: Ouémé, Ogun, Oshun, the Niger delta, Niger River up to Lake Kainji and the rivers Benue and Cross, in Benin and Nigeria (Ref. 57129). Also reported from the Ofin River (Pra basin) in Ghana (Ref. 248, 272).
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 31.6 cm TL mannelijk / geslacht onbekend; (Ref. 57129)
Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 74 - 87; Anale zachte stralen: 57 - 67; Wervels: 60 - 62. Diagnosis: tooth plates extremely narrow (Ref. 248, 57129). Vomerine tooth plate very long (Ref. 248), its length almost twice that of the premaxillary plate (Ref. 57129). Width of premaxillary plate 21.5-26.2% of head length, width of vomerine plate 19.0-22.8% of head length, length of vomerine plate 5.2-8.6% of head length (Ref. 57129). Head short and rounded in dorsal outline; eyes relatively large and dorsally located; frontal fontanelle very small, short and squat (`sole-shaped'); occipital fontanelle small and oval-shaped; "dermosphenotic" and supraorbital bones joined by a common suture, except in a specimen of 27 mm SL; pectoral spine robust and slightly curved; openings of secondary canals along lateral line appear as irregular white spots on body (Ref. 248).
Coloration: no information on colour in life (Ref. 57129). Preserved specimens show 2 types of colouration: uniform, with back and sides dark brown and belly lighter; and marbled, with irregular brownish spots against a light background on back and sides, and belly whitish (Ref. 57129). Dorsal and anal fins white-edged (Ref. 57129).
Facultative air-breathing (Ref. 126274); No information is available on the biology of the species (Ref. 78218).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00366 - 0.01249), b=3.03 (2.87 - 3.19), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (22 of 100).
