INFLUENCE OF AHEMERAL PHOTOPERIOD ON BROMATOLOGICAL CHARACTERISTICS OF CARCASSES OF TAMBAQUI (Colossoma macropomum) JUVENILES

Authors

  • Pedro Pierro Mendonça Universidade Estadual do Norte Fluminense
  • Monique V. Barbosa dos Santos Fundação Instituto de Pesca do Estado do Rio de Janeiro
  • Manuel V. Vidal Junior Universidade Estadual do Norte Fluminense
  • Dalcio Ricardo de Andrade Universidade estadual do Norte Fluminense

DOI:

https://doi.org/10.5216/cab.v12i2.4917

Keywords:

Bioclimatology

Abstract

The aim of this study was to evaluate the influence of ahemeral photoperiod on the chemical composition of the carcasses of tambaqui (Colossoma macropomum). The experiment was conducted using 190 fish with average weight of 11.01± 2.08g and total lenght of 7.8± 0.18cm, stored in sixteen bowls of 56 liters of water with daily renewal of 40-times volume. The water temperarature was maintained at 29.1± 0.41°C and the stocking rate was equivalent to 2.75g/L. All tanks had constant aeration. Ahemeral photoperiods were maintained with the aid of timers. The following treatments were used: T1= 6 hours of light, T2= 12 hours of light, T3= 18 hours of light and T4= 24 hours of light with four replications each. The juveniles were fed twice a day with commercial extruded feed (28% crude protein). The experiment lasted 64 days and the chemical composition of eviscerated and shedded carcasses were analysed at the beginning, at 32 days and at the end of it for the evaluation of crude protein, ether extract, ash and non nitrogenous extract in dry matter and in natural matter. Statistical analysis of variables was performed with the aid of SAEG application, version 9.1. For performing analysis of variance, Pearson correlations and regressions were used. There was no effect of ahemeral photoperiods (p<0.05) in variables.

KEYWORDS: Acquaculture; Bioclimatology; Native fish.

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Published

2011-06-24

How to Cite

MENDONÇA, P. P.; DOS SANTOS, M. V. B.; VIDAL JUNIOR, M. V.; DE ANDRADE, D. R. INFLUENCE OF AHEMERAL PHOTOPERIOD ON BROMATOLOGICAL CHARACTERISTICS OF CARCASSES OF TAMBAQUI (Colossoma macropomum) JUVENILES. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 12, n. 2, p. 213–220, 2011. DOI: 10.5216/cab.v12i2.4917. Disponível em: https://revistas.ufg.br/vet/article/view/4917. Acesso em: 25 nov. 2024.

Issue

Vol. 12 No. 2 (2011)

Section

Animal Production

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