Actinopteri (ray-finned fishes) > Characiformes
(Characins) > Serrasalmidae
(Piranhas and pacus) > Colossomatinae
Etymology: Piaractus: Greek, piar = fat, the side with grease of a body + Greek, aktos , ago = to carry. More on author: Cuvier.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; pelagic; pH range: 4.8 - 6.8; dH range: ? - 15; depth range - m (Ref. ), usually - m (Ref. ). Tropical; 23°C - 28°C (Ref. 2060); 23°N - 11°S
South America: Amazon and Orinoco River basins (Ref. 39031). Reported from Argentina (Ref. 9086).
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 52 - ? cm
Max length : 88.0 cm TL male/unsexed; (Ref. 40637); max. published weight: 25.0 kg (Ref. 2060); max. reported age: 28 years (Ref. 39139)
Juveniles mimic Serrasalmus nattereri. Feeds on insects and decaying plants (Ref. 32894). Possesses powerful dentition that can cause serious bites (Ref. 4537). An important foodfish (Ref. 12202).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Assuming standard charicid mode of reproduction. Replace ASAP.
Ortega, H. and R.P. Vari, 1986. Annotated checklist of the freshwater fishes of Peru. Smithson. Contrib. Zool. (437):1-25. (Ref. 6329)
IUCN Red List Status (Ref. 124695)
Threat to humans
Fisheries: minor commercial; aquaculture: commercial; aquarium: commercial
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.00995 - 0.03650), b=3.07 (2.89 - 3.25), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 2.5 ±0.22 se; based on food items.
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (tm=7; tmax=28).
Vulnerability (Ref. 59153
): High to very high vulnerability (66 of 100) .
Nutrients (Ref. 124155
): Calcium = 55.1 [16.6, 148.7] mg/100g ; Iron = 1.32 [0.72, 2.78] mg/100g ; Protein = 18.1 [15.9, 20.4] % ; Omega3 = 0.273 [0.117, 0.654] g/100g ; Selenium = 46.9 [19.9, 122.8] μg/100g ; VitaminA = 17.7 [4.8, 61.5] μg/100g ; Zinc = 1.53 [0.95, 2.45] mg/100g (wet weight);