Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
marien; zoet water; brak water demersaal; katadroom (Ref. 51243). Tropical; 25°N - 35°S
Western Indian Ocean: east coast rivers of Africa from Kenya south to Cape Agulhas, also in Madagascar and other western Indian Ocean islands (Ref. 7248, 52193). Reported from New Caledonia (Ref. 11889).
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 150 cm TL mannelijk / geslacht onbekend; (Ref. 3506); 120.0 cm SL (female); max. gepubliceerd gewicht: 5.7 kg (Ref. 52193); max. gepubliceerd gewicht: 5.7 kg; max. gerapporteerde leeftijd: 20 Jaren (Ref. 48660)
Dorsale stekels (totaal) : 0; Anale stekels: 0.
Body shape (shape guide): eel-like; Cross section: circular.
Migratory species, which breeds in the ocean (Ref. 52331). Inhabits both quiet and fast flowing water (Ref. 13337). Elvers ascend rivers mainly at night and overcome waterfalls and walls of dams with great determination. Adults usually sedentary. Females can attain 120 cm SL and are generally longer and heavier than males (Ref. 48660). Carnivorous, eats dead or living prey but especially fish and crabs. After feeding in fresh water for ten years or more, adults assume a silver breeding dress, the eyes become enlarged and they return to sea to breed. Considered to breed east of Madagascar, but thought to move south of that island on its way to the Mozambique coast and South African rivers (Ref. 13337). Flesh fatty but highly esteemed as smoked or jellied eel (Ref. 5214). Caught with various types of nets (Ref. 4967).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Castle, P.H.J., 1984. Anguillidae. p. 34-37. 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. 3506)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: commercieel; Aquacultuur: commercieel; sportvis: ja
Tools
Speciale rapporten
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Internetbronnen
Estimates based on models
Preferred temperature (Ref.
123201): 19.6 - 27.5, mean 26.4 °C (based on 98 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00091 (0.00052 - 0.00160), b=3.20 (3.05 - 3.35), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.3 ±0.55 se; based on food items.
Generation time: 26.8 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Weerstandsvermogen (Ref.
120179): Zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (K=0.04).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (81 of 100).
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