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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).
More on author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range Ekologi

; sötvatten bottenlevande. Tropical

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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).

Size / Vikt / Age

Maturity: L_m ? range ? - ? cm
Max length : 28.0 cm TL hane/ej könsbestämd; (Ref. 81263)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 13 - 15; Mjukstrålar i ryggfenan (totalt): 0; Taggstrålar i analfenan 0; Mjukstrålar i analfenan: 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).

Facultative air-breathing (Ref. 126274)

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

Main reference Upload your references | referenser | Koordinator | Medarbetare

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 Red List Status (Ref. 130435)

Least Concern (LC) ; Date assessed: 23 April 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri:

FAO - Publication: search | FishSource |

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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).

Trofisk nivå (Ref. 69278): 3.2 ±0.5 se; based on size and trophs of closest relatives

Resiliens (Ref. 120179): Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (18 of 100).

Price category (Ref. 80766): Unknown.

Polypterus ansorgii Boulenger, 1910