Bibliographic citations
Zapata, K., (2016). Retención proteica y lipídica corporal de juveniles de tilapia gris (Oreochromis niloticus) cultivados en sistemas biofloc a diferentes relaciones C:N [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2753
Zapata, K., Retención proteica y lipídica corporal de juveniles de tilapia gris (Oreochromis niloticus) cultivados en sistemas biofloc a diferentes relaciones C:N [Tesis]. : Universidad Nacional Agraria La Molina; 2016. https://hdl.handle.net/20.500.12996/2753
@mastersthesis{renati/249224,
title = "Retención proteica y lipídica corporal de juveniles de tilapia gris (Oreochromis niloticus) cultivados en sistemas biofloc a diferentes relaciones C:N",
author = "Zapata Lovera, Katherine Patricia",
publisher = "Universidad Nacional Agraria La Molina",
year = "2016"
}
The study evaluated the effect of three carbon:nitrogen (C:N) ratios in biofloc system (BFT) on the body protein and lipid retention of juvenile Oreochromis niloticus, productivity and water quality parameters, for 58 days. Using a complete randomized design (CRD) with four treatments and three replications: control (CL) and three BFT with C:N ratios of 10:1, 15:1 and 20:1, divided into twelve 0.04m3 tanks, with 30 fish each one (average weight: 1.55±0.01g). A commercial diet (40 percent of protein and 9 percent of lipids) was proportioned at food rate of 10 percent (first 30 days) and 7 percent (next 28 days). Weekly, physics-chemical parameters of water quality and productivity parameters were evaluated; also, molasses was added as a source of organic carbon and calcium hydroxide as carbonate source. At the end of the experiment significant differences was found between the protein retention of fish in CL versus BFT (p <0.05), due to the presence of microbial communities in BFT. The protein productive value (PPV) in BFT treatments, indicate that unutilized nitrogen was used to the formation of microbial protein, incrementing the body protein retention up to 50 percent. The lipid retention showed no significant different between treatments (p> 0.05). The interaction between water quality and productivity parameters in the treatment C:N 10:1 favored in lower the production of settleable solids (38.61±0.54ml.l-1) achieving a higher final load (15.50±0.81Kg.m-3), however the control achieved rapid growth (22.35±0.26g) with less survival rate (61.11±5.09 percent). In short, the C: N ratio of 10:1 gives greater body protein retention, high survival and final load, and low feed conversion ratio in the cultivation of juvenile Oreochromis niloticus.
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