Environment: milieu / climate zone / depth range / distribution range
पारिस्थितिकी
; स्वच्छ जल, अलवण जल बेनथोपिलाजिक; पोटामोड़िरोमस (Ref. 51243). Subtropical; 24°S - 30°S
Africa: Orange-Vaal River system.
Length at first maturity / आकार / वज़न / Age
Maturity: Lm 51.8, range 7 - ? cm
Max length : 82.5 cm FL पुल्लिंग / अलिंग; (Ref. 7248); अधिकतम प्रकाशित वज़न: 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)
Life cycle and mating behavior
Maturities | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा
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 Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
जलीयकृषि: प्रयोगात्मक; आखेट मत्स्य: हां
साधन
Special reports
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इंटरनेट स्रोत
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=0.00912 (0.00487 - 0.01708), b=3.06 (2.90 - 3.22), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (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.
लौटाव (Ref.
120179): बहुत नीचे, न्यूनतम जनसंख्या दुगनी समय अवलागत 14 महीने। (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (67 of 100).
Nutrients (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);