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Piaractus mesopotamicus, the small-scaled pacu, Paraná River pacu or simply pacu (a name shared with other species), is a South American ray-finned fish that is native to the Paraguay-Paraná River basin,[2][3] but it has been introduced by aquaculture activities in a wider area.[4] In its native range it is also known as the pacú chato, pez chato ("flat fish") or mbiraí-piraí.[5]

Piaractus mesopotamicus
A group near Bonito, Brazil
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Characiformes
Family:	Serrasalmidae
Genus:	Piaractus
Species:	P. mesopotamicus
Binomial name
Piaractus mesopotamicus (Holmberg, 1887)[1]
Synonyms
Myletes edulis Myletes mesopotamicus Colossoma mitrei Colossoma canterai Colossoma mesopotamicus

Piaractus mesopotamicus is a robust fish, with ovoid shape, flattened laterally. Its colour is dark grey to silver, with a white belly and a yellow breast.[2] It reaches up to 62 cm (2.03 ft) in length[4] and 20 kg (44 lb) in weight.[2] The other member of its genus, P. brachypomus, can be distinguished by its larger scale-size[6] and the lower number of lateral scales (less than 110).[7]

Piaractus mesopotamicus is an omnivore.[4] Young individuals usually feed on micro-crustaceans, while adults feed on plant material and insects.[4] Main food items for adults are nuts and seeds that fall from trees in flooded forests.[2] It tolerates water temperatures between 15 and 35 °C (59–95 °F), but stops feeding when it falls below 18 °C (64 °F).[4]

References

• El Pato Web: Especies del Paraná (in Spanish)

На других языках

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- [en] Piaractus mesopotamicus

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[es] Piaractus mesopotamicus

El pacú blanco (Piaractus mesopotamicus) también llamado gambitana, morocoto, cachama blanca, o mbiraí pitaí es un pez de agua dulce de la familia Serrasalmidae (subfamilia Colossominae), nativo de la cuenca de los ríos Paraguay y Paraná.

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