Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin; eau douce; saumâtre démersal; catadrome (Ref. 138280). 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).
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 150 cm TL mâle / non sexé; (Ref. 3506); 120.0 cm SL (female); poids max. publié: 5.7 kg (Ref. 52193); poids max. publié: 5.7 kg; âge max. reporté: 20 années (Ref. 48660)
Épines dorsales (Total) : 0; Épines anales: 0.
Body shape (shape guide): eel-like; Cross section: circular.
Migratory species, which breeds in the ocean (Ref. 52331). Adults iInhabit 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).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Semelparous.
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)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: commercial; Aquaculture: commercial; pêche sportive: oui
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf. 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00089 (0.00051 - 0.00156), b=3.20 (3.05 - 3.35), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Niveau trophique (Réf. 69278) |
3.3 ±0.55 se; based on food items. |
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Generation time |
26.8 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies. |
Résilience (Réf. 120179) |
Très faible, temps minimum de doublement de population supérieur à 14 ans (K=0.04). |
Vulnérabilité de la pêche (Ref. 59153) |
Very high vulnerability (81 of 100). 🛈 |
Catégorie de prix (Ref. 80766) |
Unknown.
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