Polypterus retropinnis, West African bichir

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Polypterus retropinnis Vaillant, 1899

West African bichir
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Polypterus retropinnis
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Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335).
More on author: Vaillant.

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

; sötvatten bottenlevande. Tropical

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Africa: Ogowe and Congo River basins in Central Africa (Ref. 3188, 56367, 81628). Reports from West Africa (Ref. 4537) refer to Polypterus retropinnis lowei, which is now a synonym of Polypterus palmas (Ref. 122071).

Size / Vikt / Age

Maturity: Lm ?  range ? - ? cm
Max length : 34.0 cm SL hane/ej könsbestämd; (Ref. 51884)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 7 - 9; Taggstrålar i analfenan 12-15; Ryggkotor: 55 - 58. Diagnosis: Polypterus retropinnis is distinguished from all other species of Polypterus except P. mokelembembe, P. ornatipinnis, P. teugelsi, P. polli and P. palmas in having a high predorsal-scale count: 26-34 vs. 11-25 (Ref. 56367). It differs from P. ornatipinnis, P. teugelsi and P. polli in having 56-59 lateral-line scales vs. 61-65 in P. ornatipinnis and P. teugelsi and 52-55 in P. polli; from P. palmas by having a single large black blotch on the pectoral-fin base vs. numerous small spots on posterior part of base; and from P. mokelembembe by having a narrower first dorsal-fin spine being 4,6-6,1% of head length vs. 6,4-8,1%, a greater internostril distance being 14,3-18,0% of head length vs. 11,6-13,7%, and more pectoral-fin rays, 30-34 vs. 23-29 (Ref. 56367). Jaws mostly about the same length, the upper jaw sometimes a little longer than lower jaw; pectoral fin not reaching dorsal-fin origin (Ref. 43035, 46852). In addition, living specimens of Polypterus retropinnis differ from all congeners in their iris coloration, which consists of creamy white areas and black dots alternating with each other around the iris; however, this character state is rarely visible in preserved specimens (Ref. 56367).

Biologi     Ordlista (t.ex. epibenthic)

Facultative air-breathing (Ref. 126274); Mostly found in little rivers, swamps and flooded zones (Ref. 4910, 41580, 46852). Carnivorous (Ref. 41580).

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

Main reference Upload your references | referenser | Koordinator | Medarbetare

Britz, R., 2007. Polypteridae. p. 168-173. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 81628)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 07 June 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fiskeri: saknar intresse
FAO - Publication: search | FishSource |

Ytterligare information

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Internet-källor

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | Offentliga akvarier | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoobank | Zoological Record

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):  2.6   ±0.26 se; based on food items.
Resiliens (Ref. 120179):  Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (31 of 100).