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Polypteriformes (Bichirs) >
Polypteridae (Bichirs)
Etymology: Polypterus: Greek, poly = a lot of + Greek, pteron = wing, fin (Ref. 45335); palmas: From its origin: 'Cape Palmas' (Ref. 46516).
More on author: Ayres.
Environment: milieu / climate zone / profondeur / distribution range
Écologie
; eau douce démersal; pH range: ? - 7.0; dH range: ? - 10. Tropical; 26°C - 28°C (Ref. 2060); 7°N - 10°S
Africa: coastal rivers of the Gulf of Guinea, from Guinea Bissau to Liberia and upper Cavally River in Côte d'Ivoire; also in upper Casamance River in Senegal (Ref. 28149, 81263). Reports from the Congo River basin (Ref. 44840, 51193) and Democratic Republic of the Congo (Ref. 4537) probably refer to Polypterus polli, previously a subspecies of Polypterus palmas, and only known from the Congo River basin (Ref. 28149).
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 35.3 cm SL mâle / non sexé; (Ref. 28149)
Épines dorsales (Total) : 7 - 10; Épines anales: 12 - 14; Vertèbres: 56 - 59. Diagnosis: Polypterus palmas is distinguished from other species of the genus by the upper jaw longer than lower jaw, pectoral fin not reaching the level of the first dorsal fin ray and 27-32 scales between occiput and first dorsal fin ray (Ref. 2835, 28149, 42908, 81263).
Body shape (shape guide): elongated; Cross section: circular.
Facultative air-breathing (Ref. 126274)
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Hanssens, M.M., G.G. Teugels and D.F.E. Thys Van Den Audenaerde, 1995. Subspecies in the Polypterus palmas complex (Brachiopterygii; Polypteridae) from West and Central Africa. Copeia 1995(3):694-705. (Ref. 28149)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-1)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: sans intérêt; Aquarium: Commercial
Outils
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Sources Internet
Estimates based on models
Phylogenetic diversity index (Réf.
82804): PD
50 = 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).
Niveau trophique (Réf.
69278): 2.9 ±0.43 se; based on food items.
Résilience (Réf.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec=5 observed in Aquatium is probably too low; assuming > 10 fecundity (RF)).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (33 of 100).
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