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Polypterus bichir Lacepède, 1803

Nile bichir
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Polypterus bichir
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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 生態学

; 新鮮な水 底生の; potamodromous (Ref. 51243). Tropical

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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).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 74.0 cm TL オス/雌雄の選別がない; (Ref. 81263); 最大公表体重: 2.7 kg (Ref. 367)

簡単な記述 検索表 | 形態学 | 形態計測学

背面の脊椎 (合計) : 13 - 18; 背鰭 (合計) : 0; 肛門の骨: 0; 臀鰭: 13 - 16; 脊つい: 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).

生物学     用語集 (例 epibenthic)

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 | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

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)

IUCNのレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 01 January 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 商業
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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
栄養段階 (Ref. 69278):  4.5   ±0.80 se; based on food items.
回復力 (Ref. 120179):  高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (50 of 100).
価格帯 (Ref. 80766):   Unknown.