Densidade de estocagem no crescimento, composição e perfil lipídico corporal do jundiá Stocking density in growth, composition and body lipid profile of jundiá

Abstract

O objetivo do trabalho foi avaliar o crescimento, a composição e o perfil lipídico corporal de jundiás criados em diferentes densidades de estocagem (DE: 4,2; 6,4; 8,6 e 10,8kg m-3) em sistema com recirculação de água. Durante 120 dias, 420 peixes (peso inicial=182,95±2,96g) foram alimentados uma vez ao dia, até a saciedade aparente, com dieta peletizada formulada. Observou-se que, quanto maior a DE utilizada, menor é o peso individual dos peixes, entretanto a biomassa por tanque aumentou (PThe aim of this research was to evaluate growth and body composition of jundiá farmed at different stocking densities (SD: 4.2, 6.4, 8.6 and 10.8kg m-3) in a water re-use system. During 120 days, 420 fish were fed near to satiation once a day. It was observed that in the highest SD, the individual fish weight was lower, however the biomass per tank increased (P<0.05). The best feed conversion ratio (1.69) and intraperitoneal fat (3.92%) were observed in fish subjected to density of 4.2kg m-3. The body protein was affected by SD. Saturated fatty acids decreased and unsaturated fatty acids increased according to the increase of SD. It was concluded that stocking density influences the final size and yield per volume of jundiá.

Keywords

• ácidos graxos
• biomassa
• criação
• Rhamdia quelen
• sistema de recirculação
• fatty acids
• biomass
• rearing
• Rhamdia quelen
• water re-use system