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Characiformes (Characins) >
Serrasalmidae (Piranhas and pacus) > Colossomatinae
Etymology: Piaractus: Greek, piar = fat, the side with grease of a body + Greek, aktos , ago = to carry.
Taxonomic Remarks
See Géry (1986: 102) for more detail.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce démersal; potamodrome (Ref. 138143). Subtropical; 15°S - 38°S, 66°W - 42°W
South America: Paraguay-Paraná River basin.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 50.0 cm SL mâle / non sexé; (Ref. 81048); poids max. publié: 20.0 kg (Ref. 32894)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Dark grey to silver dorsally and laterally and white ventrally with a yellow breast.
Body shape (shape guide): short and / or deep.
Adults invade the flooded forests to feed on nuts and seeds which fall from trees (Ref. 32894). Reaches around 50.0 cm SL (Ref. 81048).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Assuming standard characid reproduction. Replace ASAP.
Lovshin, L.L., 1995. The colossomids. p. 153-159. In C.E. Nash and A.J. Novotny (eds.) World animal science: production of aquatic animals: fishes. Elsevier Science, Amsterdam, The Netherlands. (Ref. 32894)
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; Aquaculture: commercial; pêche sportive: oui
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02455 (0.01075 - 0.05606), b=3.00 (2.80 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Réf.
69278): 2.0 ±0.00 se; based on food items.
Résilience (Réf.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (Preliminary K or Fecundity.).
Vulnérabilité de la pêche (Ref.
59153): Moderate vulnerability (44 of 100).
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Nutriments (Ref.
124155): Calcium = 76.1 [25.1, 186.6] mg/100g; Iron = 1.76 [0.87, 4.38] mg/100g; Protein = 18.7 [16.6, 21.0] %; Omega3 = 0.522 [0.209, 1.343] g/100g; Selenium = 42.4 [16.5, 105.7] μg/100g; VitaminA = 8.7 [2.3, 31.5] μg/100g; Zinc = 1.13 [0.75, 1.83] mg/100g (wet weight);