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Polypterus weeksii Boulenger, 1898

Mottled bichir
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Image of Polypterus weeksii (Mottled bichir)
Polypterus weeksii
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Congo (Kinshasa) country information

Common names: Mokoi
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from Pool Malebo (Ref. 41585, 44796, 44842, 44985, 45486), the middle Congo River (Ref. 4910, 42907), Kasai (Ref. 42907), Ubangi (Ref. 41590, 45441), Uélé (Ref. 42907), Ruki (Ref. 42907, 93897) and Itimbiri (Ref. 106290). Type-locality of holotype of Polypterus weeksii: 'Monsembe, Upper Congo' (Ref. 3188, 45628). Type-locality of holotype of Polypterus schoutedeni: 'Fl. Congo à Mongende (Congo belge)' (Ref. 3188, 49956). Also Ref. 1878, 1879, 3188, 4537, 41591, 42033, 42855.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/cg.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Poll, M., 1941
National Database:

Common names from other countries

Classificação / Names Nomes comuns | Sinónimos | Catalog of Fishes(Género, Espécies) | ITIS | CoL | WoRMS | Cloffa

> Polypteriformes (Bichirs) > Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335);  weeksii: Named after Dr. Schouteden, collector of the type-specimens (Ref. 41591, Ref. 49956).
  More on author: Boulenger.

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

; Água doce demersal.   Tropical

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Africa: middle Congo River basin (Ref. 3188) in Republic of Congo (Ref. 44840) and Democratic Republic of the Congo (Ref. 42907).

Tamanho / Peso / Idade

Maturity: Lm ?  range ? - ? cm
Max length : 54.0 cm TL macho/indeterminado; (Ref. 3188)

Descrição breve Chaves de identificação | Morfologia | Morfometria

Espinhos dorsais (total) : 9 - 11; Espinhos anais: 10 - 14. Body more or less compressed (Ref. 42873, Ref. 42901, Ref. 42907). Body depth 6.5 to 9.5 times in standard length; head length 4.25 to 5.5 times in standard length (Ref. 42907). Upper jaw slightly prominent or of equal length with lower jaw (Ref. 1878, Ref. 42907). Number of dorsal finlets: 9-11 (Ref. 42908, Ref. 51884). Number of branched dorsal and caudal rays: 15 (Ref. 49956). Pectoral fin not reaching dorsal fin origin (Ref. 42873, Ref. 45628). Ganoid scales (Ref. 42904): 57-65 lateral line scales, 44-48 scales around body, 20-26 predorsal scales (Ref. 42908, Ref. 44840, Ref. 44985). Dorsal side olive-green to gray colored, ventral side yellowish; 7 or 8 blackish bars bifurcating on the lower parts of the flanks (Ref. 1878, Ref. 4904, Ref. 44985). Fins are spotted, marbled, or irregularly barred with black (Ref. 4904).

Biologia     Glossário (ex. epibenthic)

Facultative air-breathing (Ref. 126274)

Life cycle and mating behavior Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas

Referência principal Upload your references | Referências | Coordenador | Colaboradores

Gosse, J.-P., 1984. Polypteridae. p. 18-29. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). Volume I. ORSTOM, Paris and MRAC, Tervuren. 410 p. (Ref. 3188)

Categoria na Lista Vermelha da IUCN (Ref. 130435)

  Preocupação menor (LC) ; Date assessed: 16 February 2009

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

  Harmless




Utilização humana

FAO(Publication : search) | FishSource |

Mais informação

Trophic ecology
Itens alimentares
Diet compositions
Food consumptions
Food rations
Predadores
Ecology
Ecologia
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Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
Frequência de comprimento
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Physiology
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Tipo de natação
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Visual pigment(s)
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Genetics
Genética
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Stamps, coins, misc.
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Referências

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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).
Nível Trófico (Ref. 69278):  3.3   ±0.5 se; based on size and trophs of closest relatives
Resiliência (Ref. 120179):  Elevada, tempo mínimo de duplicação da população menor que 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (42 of 100).