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Polypteriformes (Bichirs) >
Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335); bichir: Named after the local name for the fish (Ref. 43537).
More on author: Lacepède.
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный демерсальный; мигрирует в реке (Ref. 51243). Tropical
Africa: The subspecies Polypterus bichir bichir is known from the Chad basin, Nile River basin and Lake Turkana (Ref. 2835, 81263). Reports from Lake Turkana and the Ouémé are questionable as unsupported by photographs or museum specimens (Ref. 122071). The subspecies Polypterus bichir lapradei is known from the rivers Senegal, Gambia, Geba, Volta and Niger (Ref. 2835, 81263).
Size / Вес / Возраст
Maturity: Lm ? range ? - ? cm
Max length : 74.0 cm TL самец/пол неопределен; (Ref. 81263); наибольший вес (опубликованные данные): 2.7 kg (Ref. 367)
колючие лучи спинного плавника (общее число) : 13 - 18; членистые (мягкие) лучи спинного плавника (общее число) : 0; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 13 - 16; позвонки: 61 - 62. Diagnosis: Polypterus bichir is characterized by a lower jaw slightly longer than upper jaw and a pectoral fin reaching the first dorsal ray (Ref. 2835, 42908, 81263). The subspecies P. bichir bichir has 63 to 70 scales in lateral line, 14 to 18 dorsal fin rays and 11 to 13 pelvic fin rays (Ref. 367, 81263). The subspecies P. bichir lapradei has 58 to 68 scales in lateral line, 13 to 15 dorsal fin rays and 13 to 16 pelvic fin rays (Ref. 367, 81263).
Facultative air-breathing (Ref. 126274); Polypterus bichir bichir likes shallow water and will often lie basking fo hours near the surface, but when swimming the fish is very pliant, and can turn and twist like an eel (Ref. 4904). The eggs are deposited in weeds, where the adult fish guards the eggs and young (Ref. 36900). It feeds on bottom-feeding fish (Ref. 36900) and is essentially piscivorous (Ref. 367).
Life cycle and mating behavior
Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки
Gosse, J.P. and J. Daget, 2003. Polypteridae. p. 101-112. In D. Paugy, C. Lévêque and G.G Teugels (eds.) The fresh and brackish water fishes of West Africa Volume 1. Coll. faune et flore tropicales 40. Institut de recherche de développement, Paris, France, Muséum national d'histoire naturelle, Paris, France and Musée royal de l'Afrique Central, Tervuren, Belgium, 457p. (Ref. 81263)
Статус Красного Списка МСОП (Ref. 130435)
Угроза для людей
Harmless
Использование человеком
рыболовство: коммерческий
дополнительная информация
инструменты
Специальные отчеты
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00195 - 0.01073), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 4.5 ±0.80 se; based on food items.
устойчивость к внешним воздействиям (Ref.
120179): высокий, минимальное время удвоения популяции до 15 месяцев (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (50 of 100).
