Matrinxã Brycon orthotaenia rearing in floating cage in different stocking densities - DOI: 10.4025/actascibiolsci.v32i1.3687

• Autor(a) principal: Pedreira, Marcelo Mattos
• Data de Publicação: 2009
• Outros Autores: Sampaio, Edson Vieira, Santos, José Cláudio Epaminondas dos, Luz, Ronald Kennedy
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum Biological Sciences
• Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/3687
• topic: São Francisco river; Characidae; floating Cage; neotropical fish; matrinxã; rio São Francisco; Characidae; tanques-rede; espécie neotropical; matrinxã; 5.06.03.00-0

This experiment evaluated the development and survival of matrinxã Brycon orthotaenia juveniles reared during a 197-day experiment, in a 4 m3 floating cage, in three stocking densities: 20, 40 and 60 fish m-3. Juveniles with 19.9 ± 0.3 cm of total length and 90.0 ± 0.15 g of weight were used. The animals were fed with floating pellets (commercial diet with 36% crude protein). The total length, and weight were higher (p < 0.05) in the density of 20 fish m-3. The density of 40 and 60 fish m-3 showed intermediary and low values, respectively. Survival and Fulton condition factor were similar (p > 0.05) among the different densities; however, the produced biomass was higher (p < 0.05) in densities of 40 and 60 fish m-3. The increased stocking density showed a more homogeneous growth. The increase in stocking density for B. orthotaenia juveniles presented a higher biomass, homogeneity of fishes, lesser growth, but had no effect in survival.