Produção Nacional
Desempenho produtivo e viabilidade econômica de juvenis de tilápia-do-Nilo cultivados na região oeste do Paraná sob diferentes densidades de estocagem
2008; UNIVERSIDADE FEDERAL DA BAHIA; Volume: 9; Issue: 2 Linguagem: Inglês
ISSN
1519-9940
AutoresNilton Garcia Marengoni, Guilherme Wolff Bueno, Affonso Celso Gonçalves, Ana Alix Mendes de Almeida Oliveira,
Tópico(s)Aquaculture disease management and microbiota
ResumoIt was aimed at with this work to evaluate the effect of the stocking density on the performance parameters, survival and economic viability of the production of juvenile of Nile tilapia (Oreochromis niloticus), Chitralada strain in half-intensive system, using twelve tank nurseries. 2700 juvenile sexually reverted with initial average weight of 0.65 g were distributed in an entirely randomized experimental design with four treatments (different stocking densities: 1, 2, 3, 4 peixes/m3) and three repetitions. During the tracking of the physical-chemical variables of the water, the pH (6.6 to 7.1) and the conductivity (24 μS/cm) had presented satisfactory average values. However, the transparency (47 to 87 cm), the dissolved oxygen (3.09 to 4.60 mg/L) and the temperature (19 to 24oC) had been outside of the normal standards recommended for the tropical fish culture. At the of the 84 days of culture the average daily mean weight (0.61 to 1.02 g/day) and the specific growth (5.22 to 5.82%) of the juveniles had presented a negative linear relationship (p<0.05) and the alimentary conversion (0.98 to 1.84) a quadratic relationship (p<0.01) in function to the stocking density. It was concluded that, in the conditions where these studies had been carried through, the stocking densities had influenced in the productive performance the juvenile of Nile tilapia, providing an increase in the ration consumption and consequently in the production cost. Through an economical analysis of the production the best economical viability is verified when used a density of up to 3 fish/m3.
Referência(s)