Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien; zoet water; brak water demersaal; katadroom (Ref. 46888). Subtropical; 16°S - 36°S
Southeast Atlantic: South African coastal waters from Walfish Bay to Natal.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturity: Lm 25.0 range ? - ? cm
Max length : 40.5 cm TL mannelijk / geslacht onbekend; (Ref. 3573); common length : 30.0 cm TL mannelijk / geslacht onbekend; (Ref. 2830)
Dorsale stekels (totaal) : 5; Dorsale zachte stralen (totaal) : 8 - 9; Anale stekels: 3; Anale zachte stralen: 9.
Found in coastal waters, mainly off rocky points and sandy beaches; may enter estuaries which serve as nursery areas (Ref. 27121). Feed mainly on diatoms and detritus, but also on planktonic crustaceans (Ref. 27121). Oviparous, eggs are pelagic and non-adhesive (Ref. 205). A primary target species of the inshore net fishery and much of it is sold salted and dried and known as 'bokkoms'. It is also an important exhibit species in public aquaria in South Africa. It is parasitised by the monogenean Gyrodactylus molweni on the external body surface (Ref. 124050).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Smith, M.M. and J.L.B. Smith, 1986. Mugilidae. p. 714-720. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 4393)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: commercieel; Aquarium: Publieke aquaria
Tools
Speciale rapporten
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Estimates based on models
Preferred temperature (Ref.
123201): 14.8 - 27, mean 24.8 °C (based on 56 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00602 - 0.01998), b=2.95 (2.80 - 3.10), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 2.4 ±0.16 se; based on food items.
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (31 of 100).
Nutrients (Ref.
124155): Calcium = 53.2 [14.2, 311.9] mg/100g; Iron = 0.741 [0.382, 1.308] mg/100g; Protein = 18.2 [16.8, 19.7] %; Omega3 = 0.681 [0.307, 1.551] g/100g; Selenium = 7.2 [3.0, 17.9] μg/100g; VitaminA = 11.3 [3.4, 37.6] μg/100g; Zinc = 0.691 [0.433, 1.097] mg/100g (wet weight);
