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> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Polypterus:Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335); ansorgii:Named after Dr. W.J. Ansorge (Ref. 43036). Eponymy: Dr William John Ansorge (1850–1913) was an English explorer and collector who was active in Africa in the second half of the 19th century. [...] (Ref. 128868), visit book page. More on author: Boulenger.
Environment: milieu / climate zone / 深さの範囲 / distribution range 生態学
Africa: The species is described from the Corubal River in Guinea Bissau (Ref. 2835, 81263); and it has been reported recently from the Niger basin in Guinea and in lake Kainji and the Ogun River in Nigeria (Ref. 2835, 81263).
サイズ / 重さ / 年齢
成熟: Lm? range ? - ? cm Max length : 28.0 cm TL オス/雌雄の選別がない; (Ref. 81263)
背面の脊椎 (合計) : 13 - 15; 背鰭 (合計) : 0; 肛門の骨: 0; 臀鰭: 12 - 14. Diagnosis: Polypterus ansorgii is distinguished from other species of the genus by its two jaws of equal length and its dorsal fin set forward, only separated from the head by 11 to 13 scales (Ref. 2835, 81263).
Body shape (shape guide): elongated; Cross section: circular.
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)
Phylogenetic diversity index (参照 82804): PD50 = 0.5003 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00197 - 0.01063), 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 (参照 69278): 3.2 ±0.5 se; based on size and trophs of closest relatives
回復力 (参照 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): Low vulnerability (18 of 100). 🛈
