Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water pelagisch; pH range: 6.0 - 6.5; dH range: 4 - 18; potamodroom (Ref. 51243). Tropical; 24°C - 27°C (Ref. 13371)
Africa: Chad, Niger, Volta, Gambia, Senegal (Ref. 2880, 81279). Outside West Africa this species is found in Nile basin, including Lower Nile, White Nile, Blue Nile and Murchison Nile (Ref. 5331) and Lake Mobutu Sese Seko [=Lake Albert] and Omo-Lake Turkana system (Ref. 2880).
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturity: Lm ?, range 22 - ? cm
Max length : 55.0 cm TL mannelijk / geslacht onbekend; (Ref. 2880); max. gepubliceerd gewicht: 600.00 g (Ref. 3799); max. gerapporteerde leeftijd: 7 Jaren (Ref. 2758)
Anale stekels: 0; Anale zachte stralen: 21 - 26; Wervels: 45 - 48. Diagnosis: multicuspid teeth set in two rows and not overlapping the jaws when the mouth is closed; teeth stout, not compressed; eyes without or with weakly developed adipose lids; anal fin with 22-26 rays (Ref. 28714). At most 27 gill rakers on lower limb of first gill arch (18-27); 3 unbranched and 18-23 branched anal-fin rays; dorsal-fin origin distinctly behind level of pelvic-fin insertions (Ref. 2880, 81279). Scales small (Ref. 28714), 43-51 in lateral line (Ref. 2880, 81279).
Omnivorous, stomachs examined contained seeds, zooplankton, insects or fish fry (Ref. 28714). Two subspecies: Alestes dentex dentex in the Nile and Alestes dentex sethente (Valenciennes, 1849) in Sudanian basins of West Africa.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Up to 300 eggs are scattered on the bottom. Larvae hatch after about 6 days.
Paugy, D., 1990. Characidae. p. 195-236. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren et O.R.S.T.O.M., Paris, 384 p. (Ref. 2880)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-1)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: commercieel
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00454 - 0.01328), b=3.07 (2.93 - 3.21), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trofisch niveau (Ref.
69278): 2.9 ±0.37 se; based on food items.
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (tmax=7; tm=2; K=0.43-.075).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (31 of 100).
Nutrients (Ref.
124155): Calcium = 96.6 [36.9, 226.5] mg/100g; Iron = 1.87 [0.93, 4.50] mg/100g; Protein = 19.1 [17.1, 21.4] %; Omega3 = 0.469 [0.182, 1.290] g/100g; Selenium = 56.3 [23.4, 146.4] μg/100g; VitaminA = 25.4 [9.0, 69.1] μg/100g; Zinc = 1.74 [1.21, 2.54] mg/100g (wet weight);
