Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/9765
Title: Stocking densities of juvenile Brycon orthotaenia: production parameters and economic benefits in net cages
Other Titles: Densidades de estocagem de juvenis de Brycon orthotaenia: parâmetros produtivos e benefícios econômicos em tanques-rede
Keywords: Aquaculture
Intensive system
Survival
Profitability
São Francisco river
Aquicultura
Sistema intensivo
Sobrevivência
Rentabilidade
Rio São Francisco
Issue Date: 10-Apr-2014
Publisher: Editora da Universidade Estadual de Maringá
Citation: LAGO, A. A. et al. Stocking densities of juvenile Brycon orthotaenia: production parameters and economic benefits in net cages. Acta Scientiarum. Zootechny, Maringá, v. 36, n. 3, p. 253-258, Jul./ Sept. 2014.
Abstract: Developing a rearing technology requires the determination of the optimum stocking density. This study aimed to determine the best stocking density for Brycon orthotaenia juveniles grown in net cages, during the rearing phase. The research was conducted at the Experimental Farm of EPAMIG, in Felixlândia, Minas Gerais State, in the Três Marias Reservoir. 9,000 fingerlings were distributed into 12 net cages, 2 m3 each, according to a completely randomized design with three replications and four different stocking densities (150, 300, 450, 600 fish m-3). Random samples were taken from each net cage, at the onset of the experiment and at 60 rearing days, to assess production parameters, specific growth rate and uniformity. We verified a positive linear relationship (p < 0.05) for final biomass (r2 = 0.88), weight gain (r2 = 0.87), productivity (r2 = 0.86), apparent feed conversion (r2 = 0.96) and economic viability (r2 = 0.96). For survival (r2 = 0.98), the relationship was negative (p < 0.05). There were no significant differences between treatments (p > 0.05) for growth parameters, uniformity and final weight. It can be concluded that the density of 300 fish m-3 is the most suitable, because it provides higher net revenue, survival, and a good feed conversion.
URI: http://repositorio.ufla.br/jspui/handle/1/9765
Appears in Collections:DCA - Artigos publicados em periódicos

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