Bibliographic citations
Zapata, K., (2020). Cultivo experimental de alevines de Tilapia (Oreochromis niloticus) en sistemas con recambio de agua y con tecnología Biofloc [Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/4464
Zapata, K., Cultivo experimental de alevines de Tilapia (Oreochromis niloticus) en sistemas con recambio de agua y con tecnología Biofloc []. PE: Universidad Nacional Agraria La Molina; 2020. https://hdl.handle.net/20.500.12996/4464
@misc{sunedu/3161795,
title = "Cultivo experimental de alevines de Tilapia (Oreochromis niloticus) en sistemas con recambio de agua y con tecnología Biofloc",
author = "Zapata Lovera, Katherine Patricia",
publisher = "Universidad Nacional Agraria La Molina",
year = "2020"
}
This study evaluated the experimental rearing of Oreochromis niloticus fingerling into two systems: (i) without water exchange and biofloc technology (SBF), and (ii) with 20% water exchange (control), during the sexual inversion (400 fish per tank average weight: 0.012 ± 0.001 g) and precría phase (100 fish per tank average weight: 0.128 ± 0.001 g), in 28 and 35 days respectively. For this, a completely randomized design was used with two treatments (Control and SBF) of four replicates each one, distributed in eight tanks of 0.03 m3 . It was fed a commercial diet of 46.5% protein at food rates of 30% (phase I) and 15% (phase II), likewise, molasses (organic carbon) and sodium bicarbonate (carbonates) were added at the beginning of each phase. Weekly, were monitored the productive parameters of the fish, as well as parameters of the water quality. In phase I, the tilapia fry reared in the SBF treatment obtained the best productive values (survival: 67.25%, biomass: 34.540 g, T.C.: 0.004 g.day -1 , T.C.E.: 8.501 %.day-1 , lower feed conversion rate: 3.082) due to the production of sedimentable solids (up to 24 ml.l-1 ), which, through the bioactive compounds of the biofloc, conferred resistance to fish against variations of total alkalinity and toxic nitrogen compounds. On the contrary, in phase II, tilapia fry reared in the control treatment obtained better productive values (survival: 94.67%, biomass: 442.700 g, T.C.: 0.130 g.day1 , T.C.E.: 10.203 %.day-1 ), as a result of daily water changes that decreased concentrations of toxic nitrogen compounds, which favored the growth of fish. During both phases, the SBF treatment maintained a low C:N ratio (6.72), causing the heterotrophic bacteria not to properly assimilate the TAN, which is evidenced by the decreasing production of the floc
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