EFFECT OF PHOTOPERIOD ON FILET COMPOSITION OF NILE TILAPIA JUVENILES

Authors

  • Galileu Crovatto Veras Universidade Federal do Pará (UFPA), Bragança, Pará, Brasil
  • Luis David Solis Murgas Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil
  • Marcio Gilberto Zangeronimo Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil
  • Priscila Vieira Rosa Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil
  • José Rafael Miranda Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil
  • Marcos Ferreira Brabo Universidade Federal do Pará (UFPA), Bragança, Pará, Brasil

DOI:

https://doi.org/10.1590/1809-6891v15i22238

Keywords:

Aquaculture

Abstract

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.

KEYWORDS: composition, nutrient retention, Oreochromis niloticus.

 

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Author Biographies

  • Luis David Solis Murgas, Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil

     

     

  • Marcio Gilberto Zangeronimo, Universidade Federal de Lavras (UFLA), Lavras, Minas Gerais, Brasil

     

     

     

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Published

2014-06-29

Issue

Vol. 15 No. 2 (2014)

Section

Animal Production

License

Copyright (c) 2014 Brazilian Animal Science/ Ciência Animal Brasileira

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How to Cite

VERAS, G. C. et al. EFFECT OF PHOTOPERIOD ON FILET COMPOSITION OF NILE TILAPIA JUVENILES. Brazilian Animal Science/ Ciência Animal Brasileira, v. 15, n. 2, p. 168–173, 29 Jun.2014.