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Arquivo Brasileiro de Medicina Veterinária e Zootecnia

On-line version ISSN 1678-4162


POLESE, M.F et al. Effect of corn granulometry on performance of juvenile pacu, Piaractus mesopotamicus Holmberg, 1887. Arq. Bras. Med. Vet. Zootec. [online]. 2010, vol.62, n.6, pp.1469-1477. ISSN 1678-4162.

The effect of different particle size of corn ration on the performance of juvenile pacu, Piaractus mesopotamicus, was evaluated. A total of 120 juveniles with an initial weight of 8.42±0.89g, total length 7.03±0.20cm, standard length, 6.32±0.13cm, and height 3.21±0.11cm, were distributed into 20 tanks (300L), at a density of six fish per experimental unit (tank), in a completely randomized design with five treatments consisting of different particle sizes 850, 710, 500, 300, 150µm of corn in the ration composition. Each treatment had four replicates. Among all treatments, the best animal performance was achieved with the ration with corn particle size of 150µm, reaching a feed conversion ratio of 1.38, whereas for larger feed grain size, it was 1.61. Thus, the particle size of 150µm is recommended.

Keywords : Brazilian fishes; aquaculture; fish nutrition; rations.

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