Zootechnical performance of Imperial Gift Tilapia reared in a Biofloc system under different densities
Keywords:Bioflocs; Densification; Tilapia; Biomass.
The BFT system is one of the technology options available to aquaculture producers to intensify and reduce the environmental impacts caused by the emission of effluents rich in organic matter. The principle of this technology is to recycle nutrients through a high carbon/nitrogen ratio in the water, supplementing the cultivated organisms. Therefore, the objective of the present study is to evaluate the zootechnical performance of Tilapia Imperial Gift under different densities in a BFT system. The experiment was carried out in the urban center of Redenção - Pará, with 500 Tilapia Imperial Gift fingerlings sexually coated with males. Scales and ruler were used to evaluate the fish's zootechnical performance, measuring final average weight, survival, apparent feed conversion, average size and total biomass. The use of BFT technology in the nursery stage proved to be an alternative option for rural producers, with good feed conversion rates due to the presence of microbial aggregates. The juvenile stage with a density of 66 fish/m3 with an average final weight of 200g fed with 36% CP showed good zootechnical indices, allowing to minimize the fish culture time.
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