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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
экология
; пресноводный пелагический; мигрирует в реке (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 / Вес / Возраст
Maturity: Lm 20.0, range 21 - ? cm
Max length : 78.0 cm SL самец/пол неопределен; (Ref. 2880); наибольший вес (опубликованные данные): 15.5 kg (Ref. 13337); наибольший возраст (опубликованны данные): 4 годы (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
половая зрелость | размножение | нерест | икра | Fecundity | личинки
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)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-2)
Угроза для людей
Harmless
Использование человеком
рыболовство: коммерческий; объект спортивного рыболовства: да
дополнительная информация
инструменты
Специальные отчеты
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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.
устойчивость к внешним воздействиям (Ref.
120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (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);
