Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce benthopélagique. Tropical
Africa: Ntem basin (Ref. 81636) and Dja River (middle Congo River basin) (Ref. 89136) in Cameroon, Mbini River in Equatorial Guinea (Ref. 42020), and Louetsi (=Ngounié, Ogooué tributary), Nyanga and Mouvanga Creek in Gabon (Ref. 81636). Also reported from the Itimbiri and Aruwimi (middle Congo River basin)(Ref. 106290) and the Lualaba (upper Congo River basin)(Ref. 41590) in Democratic Republic of the Congo, but these are considered questionable in Ref. 81636.
Taille / Poids / Âge
Maturity: Lm ? range ? - ? cm
Max length : 9.2 cm SL mâle / non sexé; (Ref. 81636)
Description synthétique
Morphologie | Morphométrie
Épines dorsales (Total): 0; Rayons mous dorsaux (Total): 9-11; Épines anales 0; Rayons mous anaux: 8 - 10; Vertèbres: 39. Diagnosis: body a little depressed in front (Ref. 1878), elongate, fusiform (Ref. 81636), its depth 5.66 (Ref. 41590) - 9.1 (Ref. 1878) times in TL, 8.5-9.1 times in SL (Ref. 89112, 89136), 10.8-14.5% SL, with greatest depth at or slightly anterior to dorsal fin origin (Ref. 81636). Head broader than deep, about 1.5 times as long as broad, its length 4.5-5 times in TL (Ref. 1878), 17.2-21.7% SL (Ref. 81636). Snout rounded, about as long as postorbital part of head (Ref. 1878, 89136), 2.35-2.8 times in HL (Ref. 89136). Eye superolateral, 3.75 (Ref. 41590) - 5.75 (Ref. 89136) times in HL, 1.3-1.75 times in interorbital distance, 1.65-2.45 times in snout length (Ref. 89136). Interorbital width 28.6-45.1% HL (Ref. 81636), 3.2-3.55 times in HL (Ref. 89136). Dorsal fin 1.2-1.3 times further from snout tip than from caudal fin origin (Ref. 89136), at equal distance from eye and root of caudal (Ref. 1878). Anal fin origin 2 (Ref. 1878) - 2.4 (Ref. 89136) times as distant from root of pelvics as from root of caudal. Pectoral fin paddle shaped (Ref. 81636), very large, 4-4.75 times in SL, 0.95- 1.2 times in HL (Ref. 89136). Pelvic fin 4.85-6.25 times in SL, 1-1.35 times in HL (Ref. 89136). Caudal peduncle about 1.45 (Ref. 89136) - 1.66 (Ref. 1878) times as long as deep.
Microphagous feeder (Ref. 51193).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Poll, M., 1984. Kneriidae. p. 129-133. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3565)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Plus d'informations
Noms communsSynonymesMétabolismePrédateursÉcotoxicologieReproductionMaturitéFraiRassemblement de ponteFéconditéŒufsDéveloppement de l'œuf
Taille/ÂgeCroissanceLongueur-poidsLongueur-longueurFréquences de longueursMorphométrieMorphologieLarvesDynamique des populations larvairesRecrutementAbondanceBRUVS
RéférencesAquacultureProfil d'aquacultureSouchesGénétiqueElectrophoresesHéritabilitéPathologiesTraitementNutrientsMass conversion
CollaborateursImagesStamps, Coins Misc.SonsCiguateraVitesseType de nageSurface branchialeOtolithesCerveauxVision
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Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
