Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser benthopelagisch; potamodrom (Ref. 51243). Subtropical; 24°S - 30°S
Africa: Orange-Vaal River system.
Länge bei der ersten Reifung / Größe / Gewicht / Alter
Geschlechtsreife: Lm 51.8, range 7 - ? cm
Max length : 82.5 cm FL Männchen/unbestimmt; (Ref. 7248); max. veröff. Gewicht: 22.2 kg (Ref. 7248)
Is the largest scale-bearing indigenous fish species in southern Africa. Adults prefer flowing water in deep channels or below rapids, but the species does well in dams. Mainly a predator, initially taking insects and small crustaceans but piscivore above 30 cm FL. Breeds in mid-summer to late summer over gravel beds in running water. May live for 12 or more years (Ref. 7248). Imported for food in US and Canadian markets (Ref. 4537)
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Lévêque, C. and J. Daget, 1984. Cyprinidae. p. 217-342. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 2801)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: kleinfischerei; Aquakultur: experimental; Sportfisch: ja
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00485 - 0.01716), b=3.06 (2.90 - 3.22), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophische Ebene (Ref.
69278): 3.6 ±0.54 se; based on food items.
Generation time: 15.7 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Widerstandsfähigkeit (Ref.
120179): sehr niedrig, Verdopplung der Population dauert mehr als 14 Jahre. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei (Ref.
59153): High to very high vulnerability (67 of 100).
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Nährstoffe (Ref.
124155): Calcium = 60.1 [37.7, 105.4] mg/100g; Iron = 1.35 [0.85, 2.10] mg/100g; Protein = 18.2 [17.3, 19.1] %; Omega3 = 0.613 [0.265, 1.474] g/100g; Selenium = 30.7 [13.0, 75.2] μg/100g; VitaminA = 60.4 [19.6, 206.0] μg/100g; Zinc = 0.978 [0.706, 1.381] mg/100g (wet weight);