02438naa a2200349 a 450000100080000000500110000800800410001902400550006010000150011524501810013026000090031150001130032052012360043365000180166965000220168765000240170965000230173365000170175665000180177365000160179165000300180765000160183765000160185365000220186965000230189165000230191465300200193770000200195770000200197770000250199777300660202221239142022-06-10       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1080/10454438.2020.17159092DOI1 aHISANO, H.  aEffect of feeding frequency on water quality, growth, and hematological parameters of Nile tilapia Oreochromis niloticus reared using biofloc technology.h[electronic resource]  c2021  aArquivo com texto completo se refere à versão publicada on-line, sem atribuição de volume e paginação.  aAbstract: The aim of this study was to evaluate the effect of feeding frequency on water quality, growth performance, feed efficiency, and hematological parameters of Nile tilapia reared in biofloc technology (BFT) over a period of 45 days. Fish (n = 6,480; 5.36 ± 1.45 g) were randomly distributed in nine outdoor circular tanks (9,000 L) with individual air-water lift by supplementary aeration and hand-fed with commercial diet (32% crude protein) at 5-3% of biomass, following the respective feeding frequencies: two times per day, four times per day, and six times per day. The experimental design was completely randomized with three treatments and three replicates. Feeding frequency at four times per day decreased rotifer density and improved (P &lt .05) the weight gain and protein efficiency ratio. No significant differences were observed in hematological parameters. Water quality remained within recommended ranges for tilapia culture. Turbidity and floc volume showed significant differences (P &lt .05) among treatments, with the greatest concentrations at six times per day. Feeding frequency at four times per day promoted the best growth and feed efficiency responses in Nile tilapia (5 - 20 g) cultured in BFT.  aAnimal growth  aAquaculture feeds  aAquaculture systems  aBiofloc technology  aFish culture  aWater quality  aZooplankton  aAlimentação Suplementar  aCrescimento  aHematologia  aNutrição Animal  aQualidade da Água  aTilápia Nilótica  aFeed management1 aPINHEIRO, V. R.1 aLOSEKANN, M. E.1 aSILVA, M. S. G. M. e  tJournal of Applied Aquaculturegv. 33, n. 2, p. 96-110, 2021.