Growth, survival and bone alterations in Piaractus mesopotamicus larvae under different rearing protocols

HERNÁNDEZ, DAVID ROQUE; AGÜERO, CARLOS; SANTINÓN, JUAN JOSÉ; GONZÁLEZ, ALFREDO OSCAR; SÁNCHEZ, SEBASTIÁN

CIêNCIA RURAL

UNIV FEDERAL SANTA MARIA

Lugar: Santa María; Año: 2015 vol. 45 p. 1667 - 1673

0103-8478

The pacu (Piaractus mesopotamicus) is a neotropical freshwater fish. It is one of the most important species farmed in areas of the Parana and Paraguay Rivers basins. The effects of different rearing protocols on growth, survival and incidence of keletal malformations in pacu larvae were analyzed. A total of six experimental treatments were considered, consisting of: a semiintensive larviculture (LS) in ponds; intensive larviculture (LIn) in laboratory (both LS and LIn until 60 days of life); and mixed larviculture, with 20 days of semi-intensive larviculture into cages in ponds after 14 (L1), 21 (L2), 33 (L3) or 40 (L4) days of laboratory larviculture. At the end of the experimental period, LS larvae showed higher growth rate, with average weight values (2.28g) and total length (TL-48.20mm) statistically higher than the rest (P0.05), while LIn presented the lowest growth (P