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Characiformes (Characins) >
Alestidae (African tetras)
Etymology: Hydrocynus: Greek, hydr = water + Greek, kyon = dog (Ref. 45335).
Eponymy: Dr Peter Forsskål (1732–1763) was a Swedish explorer, orientalist, naturalist and a student of Linnaeus. [...] (Ref. 128868), visit book page.
More on author: Cuvier.
Issue
Affinities: H. vittatus (Ref. 2880, 80290).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce pelagico; potamodromo (Ref. 51243). Tropical (Ref. 5331)
Africa: Cross, Wouri and Sanaga basin in Lower Guinea ichthyofaunal province (Ref. 80290). Also in Chad, Niger, Ogun, Ouémé, Mono, Volta, Comoé, Bandama, Sassandra, Nipoué, St. Paul, Mano, Little Scarcies, Gambia and Senegal basins in West Africa (Ref. 2880, 80290, 81279); Nile River, including Lake Albert (Ref. 4903, 5331); Lake Turkana and Omo River (Ref. 2880, 5331, 80290); and Congo River basin (Ref. 2880, 80290).
Length at first maturity / Size / Peso / Age
Maturity: Lm 20.0, range 21 - ? cm
Max length : 78.0 cm SL maschio/sesso non determinato; (Ref. 2880); peso massimo pubblicato: 15.5 kg (Ref. 13337); Età massima riportata: 4 anni (Ref. 2757)
Diagnosis: 2 scale rows between lateral line and scaly process at pelvic-fin bases; eye <70% of interorbital space (Ref. 2880, 81279). Dorsal-fin uniformly greyish and its origin in front of pelvic fins; adipose fin greyish; caudal fin without black edge (Ref. 80290, 81279).
Forms shoals; an open water predator often found near the water surface; feeds on fishes, preferring long bodied fish as they are easier to swallow and also takes insects, grass and snails; cannibalistic; preyed upon by fish eagle Haliaeetus vocifer; breeding migrations have been reported up several tributaries of Lake Kariba during the rains (Ref. 13337).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Paugy, D. and S.A. Schaefer, 2007. Alestidae. p. 347-411. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) Poissons d'eaux douces et saumâtres de basse Guinée, ouest de l'Afrique centrale/The fresh and brackish water fishes of Lower Guinea, west-central Africa. Vol. 1. Coll. Faune et Flore tropicales 42. Istitut de recherche pour le développement, Paris, France, Muséum nationale d'histoire naturelle, Paris, France and Musée royale de l'Afrique centrale, Tervuren, Belgique. 800 p. (Ref. 80290)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Pesca: commerciale; Pesce da pesca sportiva: si
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00631 (0.00441 - 0.00903), b=3.11 (3.01 - 3.21), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Ref.
69278): 4.0 ±0.75 se; based on food items.
Resilienza (Ref.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.17-0.45; tmax=4).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (39 of 100).
Nutrients (Ref.
124155): Calcium = 77.7 [34.3, 189.1] mg/100g; Iron = 1.64 [0.88, 3.93] mg/100g; Protein = 19 [17, 21] %; Omega3 = 0.309 [0.128, 0.777] g/100g; Selenium = 60.1 [24.5, 148.2] μg/100g; VitaminA = 40.5 [14.9, 108.0] μg/100g; Zinc = 1.2 [0.8, 1.7] mg/100g (wet weight);
