Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
; Γλυκού νερού βενθικό(ς). Tropical
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).
Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ? range ? - ? cm
Max length : 34.0 cm SL αρσενικό/απροσδιόριστο; (Ref. 51884)
Ραχιαίες άκανθες (συνολικά) : 7 - 9; Εδρικές άκανθες: 12 - 15; Σπόνδυλοι: 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).
Body shape (shape guide): elongated; Cross section: circular.
Facultative air-breathing (Ref. 126274); Mostly found in little rivers, swamps and flooded zones (Ref. 4910, 41580, 46852). Carnivorous (Ref. 41580).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
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)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
αλιεία: χωρίς ενδιαφέρον
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Δείκτης φυλογενετικής ποικιλότητας (Αναφ.
82804): PD
50 = 0.5003 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00457 (0.00194 - 0.01077), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 2.6 ±0.26 se; based on food items.
Ελαστικότητα (Αναφ.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Ευπάθεια στην αλιεία (Ref.
59153): Low to moderate vulnerability (31 of 100).
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