Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique. Tropical; 24°C - 30°C (Ref. 1672)
South America: Amazon River basin, Rupununi and Oyapock Rivers.
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 90.0 cm TL mâle / non sexé; (Ref. 50892); poids max. publié: 6.0 kg (Ref. 72380)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Body covered with very big scales; dorsal and anal fins almost fused with the caudal fin; 2 barbels at the extremity of the lower jaw; adult silvery, juvenile with blue glints and a yellow-orange bar (Ref. 12225).
Body shape (shape guide): elongated; Cross section: oval.
Is an omnivore with a tendency to feed on fish at the surface. The superior position of the mouth allows it to capture its prey while swimming from below. Also jumps out of the water to feed on large insects (Coleoptera; Ref. 27548). It is capable of adapting to environments with low oxygen levels (Ref. 12225).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
The male carries eggs, larvae and early juveniles (alevinos) in his mouth (Ref. 1672), which lasts for nearly six weeks (Ref. 102836).
Ferraris, C.J. Jr., 2003. Osteoglossidae (Arowanas). p. 30. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 50892)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Pêcheries: commercial; pêche sportive: oui; Aquarium: Commercial
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.7656 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00417 (0.00227 - 0.00767), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Niveau trophique (Réf.
69278): 3.4 ±0.48 se; based on food items.
Résilience (Réf.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref.
59153): Low to moderate vulnerability (31 of 100).
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Nutriments (Ref.
124155): Calcium = 70.2 [37.0, 146.8] mg/100g; Iron = 0.941 [0.505, 1.975] mg/100g; Protein = 16.6 [14.7, 18.3] %; Omega3 = 0.284 [0.117, 0.703] g/100g; Selenium = 112 [37, 275] μg/100g; VitaminA = 31.4 [11.0, 83.9] μg/100g; Zinc = 1.38 [0.95, 2.04] mg/100g (wet weight);
