Teleostei (teleosts) > Characiformes
(Characins) > Serrasalmidae
(Piranhas and pacus) > Colossomatinae
Etymology: Mylossoma: Greek, mylo = mill + Greek, soma = body (Ref. 45335).
More on author: Cuvier.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; benthopelagic; pH range: 5.0 - 7.8; dH range: ? - 20; potamodromous (Ref. 51243). Tropical; 22°C - 28°C (Ref. 1672)
South America: rio Paraguai, lower Paraná and lower Uruguai rivers basins.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 17 - ? cm
Max length : 25.0 cm SL male/unsexed; (Ref. 39031); max. published weight: 1.0 kg (Ref. )
Vertebrae: 35 - 36. This species differs from M. aureum by having the last abdominal spine reaching the anal-fin origin or almost so (vs. last abdominal spine clearly separated from the anal-fin origin), vertebrae 35-36 (vs. 38-39), and a conspicuous black blotch on opercle (vs. no black blotch or inconspicuous); differs from M. albiscopum by anal-fin with branched rays 26-32 (vs. 31-38); differs from M. unimaculatum by having circumpeduncular scales 30-34 (vs. 34-40), perforated scales on lateral line 74-98 (vs. 95-110) and vertebrae 35-36 (vs. 37) (Ref. 117280).
Reported to be an herbivore fish, which is highly dependent from the floodplains and of great economic importance for both commercial and sport fisheries (Ref. 117280).
Mateussi, N.T.B., C. Oliveira and C.S. Pavanelli, 2018. Taxonomic revision of the Cis-Andean species of Mylossoma Eigenmann & Kennedy, 1903 (Teleostei: Characiformes: Serrasalmidae). Zootaxa 4387(2):275-309. (Ref. 117280)
IUCN Red List Status (Ref. 126983)
Threat to humans
Fisheries: commercial; aquarium: commercial
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02512 (0.01329 - 0.04746), b=3.02 (2.85 - 3.19), in cm total length, based on LWR estimates for species & Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 2.8 ±0.36 se; based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (21 of 100).
Nutrients (Ref. 124155
): Calcium = 110 [51, 257] mg/100g ; Iron = 1.53 [0.77, 3.44] mg/100g ; Protein = 17.7 [15.7, 19.8] % ; Omega3 = 0.393 [0.149, 1.113] g/100g ; Selenium = 89.5 [34.0, 207.2] μg/100g ; VitaminA = 28.6 [9.3, 83.5] μg/100g ; Zinc = 1.84 [1.23, 2.68] mg/100g (wet weight); based on nutrient studies.