>
Characiformes (Characins) >
Hepsetidae (African pikes)
Etymology: Hepsetus: Greek, epsetas, -e, -on = boiled, but there is the following sentence: "oí epsetoi" = certain fishes, and also could be related to "psetta" = grouper (Ref. 45335); odoe: The specific name refers to the local names in the Adangme language of Hepsetus specimens in Ghana: 'Akawo nyagbe', which means 'dog-like teeth' and 'akawo' which means 'attacker' or 'predator' (Ref. 88135).
More on author: Bloch.
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce démersal; pH range: 6.0 - 7.5; dH range: ? - 18; potamodrome (Ref. 51243). Tropical; 26°C - 28°C (Ref. 2060)
Africa: easternmost part of West Africa, from the Sassandra River, Ivory Coast, in the west to the Shari River, Central African Republic, in the east; and southwards up to the Kribi River in Cameroon (Ref. 88135). Reports from outside this area refer to other species of Hepsetus (Ref. 88135, 93279, 93907, 108775).
Length at first maturity / Taille / Poids / Âge
Maturity: Lm 14.0 range ? - ? cm
Max length : 44.2 cm SL mâle / non sexé; (Ref. 83624)
Épines dorsales (Total): 0; Rayons mous dorsaux (Total): 9; Épines anales 0; Rayons mous anaux: 12; Vertèbres: 45 - 49. Diagnosis: This species is distinguished from all other Hepsetus species by the following unique combination of characters: number of lateral line scales low, 43–51; nostril-lower jaw distance short, 36.6–42.1% of head length; number of gill rakers high, 17–23; number of scales between dorsal fin and lateral line 7.5-9.5; number of scales between adipose fin and lateral line 4.5-6.5; head width broad, 32.8–42.3% of head length; and internasal distance high, 21.9–28.3% of head length (Ref. 88135).
This species seems to prefer upper river courses or small rivers where Hydrocynus species are absent or scarce (Ref. 81278).
Builds a free-floating bubblenest.
Decru, E., E. Vreven and J. Snoeks, 2012. A revision of the West African Hepsetus (Characiformes: Hepsetidae) with a description of Hepsetus akawo sp. nov. and a redescription of Hepsetus odoe (Bloch, 1794). J. Nat. Hist. 46(1-2):1-23. (Ref. 88135)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: pêcheries vivrières; Aquarium: Commercial
Plus d'informations
RéférencesAquacultureProfil d'aquacultureSouchesGénétiqueElectrophoresesHéritabilitéPathologiesTraitementNutrientsMass conversion
CollaborateursImagesStamps, Coins Misc.SonsCiguateraVitesseType de nageSurface branchialeOtolithesCerveauxVision
Outils
Articles particuliers
Télécharger en XML
Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00411 - 0.00735), b=3.13 (3.05 - 3.21), in cm total length, based on LWR estimates for this species (Ref.
93245).
Niveau trophique (Ref.
69278): 4.1 ±0.71 se; based on food items.
Generation time: 0.8 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Résilience (Ref.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.27-0.59; tmax=5; Fec < 10,000).
Fishing Vulnerability (Ref.
59153): Low vulnerability (21 of 100).
Nutrients (Ref.
124155): Calcium = 164 [63, 392] mg/100g; Iron = 2.04 [1.02, 4.59] mg/100g; Protein = 18.9 [16.8, 21.2] %; Omega3 = 0.362 [0.132, 0.962] g/100g; Selenium = 120 [47, 340] μg/100g; VitaminA = 14.6 [5.4, 40.0] μg/100g; Zinc = 1.47 [0.99, 2.21] mg/100g (wet weight);
