Ciência Animal Brasileira (Jun 2014)

EFEITO DO FOTOPERÍODO SOBRE A COMPOSIÇÃO DO FILÉ DE JUVENIS DE TILÁPIA DO NILO

  • Galileu Crovatto Veras,
  • Luis David Solis Murgas,
  • Marcio Gilberto Zangeronimo,
  • Priscila Vieira Rosa,
  • José Rafael Miranda,
  • Marcos Ferreira Brabo

DOI
https://doi.org/10.1590/1809-6891v15i22238
Journal volume & issue
Vol. 15, no. 2
pp. 168 – 173

Abstract

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This study aimed to evaluate the effect of the photoperiod on the fillet composition of Nile tilapia juveniles. We employed a completely randomized design with five treatments (0L:24D, 6L:18D, 12L:12D, 18L:6D, 24L:0D) and four replications. We used 160 Nile tilapia juveniles, distributed in 20 tanks containing 20 liters of water, in a recirculation systems, at controlled temperature of 27 °C and density of eight fish per tank. Fish were fed twice a day with commercial extruded feed containing 40% crude protein. Samples of the fillet at the end of 75 days were collected and stored in a freezer at -80 °C for subsequent analysis of chemical composition. There was no effect of photoperiod on moisture and ash content of the fillet (P>0.05). The period 18L:6D showed higher amounts of protein in the fillet, as well as lower amounts of fat (P<0.05). Therefore, it can be concluded that the photoperiod can alter Nile tilapia body composition, and the photoperiod 18L:6D contributed to the higher concentration of crude protein and lower fat deposition in Nile tilapia fillets.

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