Nile Tilapia Nursery in a Biofloc System: Evaluation of Different Stocking Densities

Vicente, Luiz Rodrigo Mota; Owatari, Marco Shizuo; Mouriño, J.L.P.; Silva, Bruno Corrêa da; Vieira, Felipe do Nascimento; Aquicultura, Departamento de; Aquos, Laboratório de Saúde de Organismos Aquáticos; Lcm, Laboratório de Camarões Marinhos

doi:10.20950/1678-2305.2020.46.2.573

Cited by 12 publications

(12 citation statements)

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“…Silva et al ( 2020) also observed higher values of SS and TSS with higher feeding rates, having reportedmaximum values of 225 mL L -1 and 1,450 mg L -1 of solids throughout the rearing of tilapia juveniles when fed with 100% of the satiety. Tilapia nursery studies in a biofloc system demonstrated a wide variation in the values of SS (0.5 to 65 mL L -1 ) and TSS (200 to 1,600 mg L -1 ) (Martins et al, 2017, Lima et al, 2018, Martins et al, 2019, Correa et al, 2020, Durigon et al, 2020, Hisano et al, 2020, Vicente et al, 2020. In this study, the solids were managed to maintain mean values close to 30 mL L -1 and 600 mg L -1 .…”

Section: Resultsmentioning

confidence: 71%

Nile tilapia nursery feeding management in a biofloc system

et al. 2022

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Nile tilapia (Oreochromis niloticus) has an opportunistic omnivorous feeding behavior and studies have demonstrated the consumption of microorganisms by the species from bioflocs, especially in the early phases of life. One may thus assume that when reared in biofloc systems, there may be a reduction in the feeding rates in the Nile tilapia nursery system when compared to the ponds. This study evaluated the effects of different feeding management options in Nile tilapia nurseries in a biofloc system. A total of 700 fingerlings (2.37 ± 0.55 g) were stocked in 20 experimental units (100 L) and inoculated with mature biofloc for the evaluation of five different feeding management options. After 49 days, it was observed that the higher feed rates caused an increase in nitrogen compounds and solids in the water, worsening the feed conversion rate. Furthermore, the excess feed supplied to the tilapia in the biofloc caused a reduction in the utilization of protein nitrogen, an increase in the liver and visceral fat, in addition to an increase in the production of solids and consumption of alkalinizer by fish biomass. On the other hand, low feeding rates cause a decrease in the growth and uniformity of the tilapia juveniles. Taking the results into consideration, it is recommended to use the feed management option proposed in treatment TC (26% below the highest feed rate) in the tilapia nursery in the biofloc system.

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Section: Resultsmentioning

confidence: 71%

Nile tilapia nursery feeding management in a biofloc system

et al. 2022

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“…The increased oxygen‐carrying capacity of blood might be the response of fish against crowding chronic stress and high energy demand situations (Montero et al, 2001). In contrast, a higher level of haemoglobin was reported in Nile tilapia ( Oreochromis niloticus ) cultivated in biofloc system at 400 fish m −3 than 600 fish m −3 density; however, higher value of haemoglobin was not significantly differed with other lower density treatments, that is 200, 300 and 500 fish m −3 (Vicente et al, 2020).…”

Section: Discussionmentioning

confidence: 92%

Effect of stocking density on growth performance, plankton abundance, body composition and haematological parameters of Etroplus suratensis (Bloch, 1790)

Yadav

Chavan²,

Chadha

et al. 2021

Aquaculture Research

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A seed rearing experiment was attempted to evaluate the effects of stocking densities in the biofilm-based system reared with pearlspot, Etroplus suratensis on different aquaculture parameters. Pearlspot advanced fry of size (4.67 ± 0.04 cm/1.71 ± 0.03 g) stocked at four different stocking densities viz 50 fish (T 1 ); 100 fish (T 2 ); 150 fish (T 3 ) and 200 fish (T 4 ) m −3 in the biofilm-based rearing system and at the rate of 150 fish m −3 in the clear water fed (CWF) system tanks. The total ammonia nitrogen and dissolved oxygen levels in biofilm tanks with different stocking density were significantly lower than CWF. Diatom was found as dominant plankton in all biofilm treatment tanks in water as well as on substrate. The growth parameters were found to significantly decrease with increasing stocking density in the biofilm-based rearing system. The significant highest individual growth parameters and significantly lowest fish biomass were found in T 1 . Final fish biomass was found to increase with increasing stocking density up to 150 advanced fry m −3 and then reduced due to decreased survival. Body composition analysis of E. suratensis showed increased protein and decreased lipid levels in all biofilm-based rearing system treatments at different stocking densities compared with clear water fed system. The present investigation findings on plankton abundance, growth, body composition and blood parameters at different stocking densities will provide guidelines for selecting appropriate stocking density for pearlspot advanced fry to fingerling rearing in a low saline biofilm-based system without providing a supplementary diet.

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“…While experimenting with different stocking densities of the Nile tilapia and BFT, Haridas et al (2017) and Vicente et al (2020) also observed an increase in the amount of ammonia with increasing fish density. However, these studies did not report any significant relationship between the concentration of nitrite and nitrate in the water with stocking density, probably due to the use of organic carbon in their studies to regulate nitrogen in the bioflocs.…”

Section: Water and Solid Analysesmentioning

confidence: 89%

“…However, as per the heterotrophic route, one gram of ammonia generates 8.07 g of microbial biomass, indicating a much higher amount of solid generation, compared to the nitrification process (0.20 g) (Ebeling et al, 2006). Incidentally, Vicente et al (2020) also reported an excess amount of total solids (> 1000 mg L -1 ) at all stock densities (200 to 600 fish m -3 with weight ranging between 20 to 30 g per fish) evaluated in tilapia. This might be due to the use of sugar to neutralize the high concentration of ammonia present in a system even before the fish reached maturity.…”

Section: Water and Solid Analysesmentioning

confidence: 92%

“…Several studies have evaluated the stocking densities at various stages of tilapia and the use of different carbon sources in the biofloc system with variable results (Lima et al, 2015;Brol et al, 2017;Haridas et al, 2017;Lima et al, 2018;Liu et al, 2018;Vieira et al, 2019;Eid et al, 2020;Vicente et al, 2020;Zaki et al, 2020;Manduca et al, 2021). However, none of these studies focused on the nursery rearing phase (1-30 g), using only an inorganic carbon source to involve the nitrification process as the main way to control nitrogen in the system.…”

Section: Introductionmentioning

confidence: 99%

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Tilapia nursery stocking densities in a chemoautotrophic biofloc system

et al. 2022

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The nursery phase in tilapia using biofloc technology is important as it increases the predictability of production. However, none studies evaluating the stocking densities of tilapia focused only on the use of an inorganic carbon source to promote the nitrification process as the main way to control nitrogen in the system. This study aimed to evaluate the effect of varied nursery stocking densities, in a chemoautotrophic biofloc system, on water quality, zootechnical parameters, and health of Nile tilapia (Oreochromis niloticus). Fifteen tanks (100 L capacity) containing heaters (28 ±1°C) inoculated with mature bioflocs were used. Seven hundred and fifty tilapia fingerlings (weighing 0.66 ±0.17 g) were distributed in the tanks, in triplicate, so that the densities in the tanks reached 200, 350, 500, 650, and 800 fish m-3. Dissolved oxygen and tilapia growth showed a negative linear relationship with fish density. A positive linear relationship with density was observed for nitrogen compounds, alkalinity, suspended solids, yield, and feed conversion. However, the water quality parameters were appropriate for tilapia and allowed good zootechnical performance irrespective of the fish density. Hematological parameters, fish survival, and uniformity in growth did not alter with densities. Total suspended solids produced by fish biomass showed a quadratic relationship with density, with the highest efficiency of the tanks stocked with 406 fish m-3. It is possible to construct a tilapia nursery in chemoautotrophic biofloc systems with densities reaching up to 800 fish m-3 and yield exceeding 12 kg m-3. But the density of 406 fish m-3 had a better efficiency in solid production by biomass.

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Nile Tilapia Nursery in a Biofloc System: Evaluation of Different Stocking Densities

Cited by 12 publications

References 50 publications

Nile tilapia nursery feeding management in a biofloc system

Nile tilapia nursery feeding management in a biofloc system

Effect of stocking density on growth performance, plankton abundance, body composition and haematological parameters of Etroplus suratensis (Bloch, 1790)

Tilapia nursery stocking densities in a chemoautotrophic biofloc system

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