Nitrogen and Phosphorus Dynamics in the Biofloc Production of the Pacific White Shrimp, <i>Litopenaeus vannamei</i>

Silva, Kassio Rios da; Wasielesky, Wilson; Abreu, Paulo César

doi:10.1111/jwas.12009

Cited by 164 publications

(106 citation statements)

References 41 publications

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“…This suggests an increase in the organic matter's mineralization rate due to the higher heterotrophic bacterial biomass present in the BFT tanks (Baloi, Arantes, Schveitzer, Magnotti, & Vinatea, 2013;Silva, Wasielesky, & Abreu, 2013). That supposition is supported by the results of EC that were higher in the C: N ratio adjusted tanks.…”

Section: Results and Discussion Water Qualitysupporting

confidence: 77%

“…There were more reactive phosphorus in the effluents of the C: N ratio adjusted tanks. These results indicate that, except for the lower concentrations of TAN, the effluents of BFT tanks are able to cause a greater eutrophication impact than the effluents derived from conventional aquaculture tanks (Crab et al, 2012;Silva et al, 2013;Liang et al, 2014). Therefore, that is one more reason for not discharging the effluents of BFT tanks directly in the nature but reusing them in recirculation aquaculture systems.…”

Section: Effluent Qualitymentioning

confidence: 89%

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<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Cavalcante

Lima

Rebouças

et al. 2016

Acta Sci. Anim. Sci.

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ABSTRACT. The present work aimed at determining the effects of the association between the periphyton-based system with the bioflocs-based system in the intensive culture of juvenile Nile tilapia (1.56 ± 0.07 g; 72 fish m -3 ), on variables of water quality, growth performance and effluent quality after 10 weeks. The experiment was arranged in a 2 x 2 factorial randomized block design with four treatments and five repetitions each. The factors tested were the following: 'underwater structure' (absence and presence) and 'adjustment of the C: N ratio of water' (no and yes). The final fish body weight, specific growth rate and yield were higher (p < 0.05) in the C: N-adjusted tanks. The presence of submerged structures in the tanks had no significant influence on those same variables. It was concluded that the periphyton-based system is not indicated for intensive farming of Nile tilapia, in which there is a high allowance of artificial feed to fish.Keywords: aquaculture, Oreochromis, limnoculture, limnology.Integração dos sistemas perifíton e bioflocos no cultivo intensivo de juvenis de tilápia do Nilo RESUMO. O presente trabalho teve por objetivo determinar os efeitos da integração do sistema baseado em substrato (perifíton) com o sistema baseado no ajuste da relação C: N da água (bioflocos), no cultivo intensivo de juvenis de tilápia do Nilo (1,56 ± 0,07 g; 72 peixes m -3 ), sobre variáveis de qualidade de água, desempenho zootécnico e qualidade de efluentes, após 10 semanas. O delineamento experimental utilizado foi em blocos ao acaso, em arranjo fatorial 2 x 2, com quatro tratamentos e cinco repetições cada. Os fatores em teste foram os seguintes 'estruturas submersas' (ausência e presença) e 'ajuste da relação C: N da água' (não e sim). Os resultados de peso corporal final, taxa de crescimento específico e produtividade de peixe foram maiores (p < 0,05) nos tanques nos quais se fez o ajuste da relação C: N da água, quando comparado aos tanques sem esse ajuste. A presença das estruturas submersas nos tanques não afetou de modo significativo essas mesmas variáveis. Concluiu-se que o sistema de cultivo de peixe baseado em substrato (perifíton) não é indicado para cultivos intensivos de juvenis de tilápia do Nilo, nos quais há grande entrada de alimento artificial nos tanques de cultivo.

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Section: Results and Discussion Water Qualitysupporting

confidence: 77%

Section: Effluent Qualitymentioning

confidence: 89%

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Cavalcante

Lima

Rebouças

et al. 2016

Acta Sci. Anim. Sci.

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“…A bio-floc system is designed to use little or no water exchange. This causes nutrients that cannot be lost atmospherically, such as phosphorus and phosphate, to accumulate in the system [41]. Phosphorus that is retained within particulate matter flocculates and can be eaten by the cultured species.…”

Section: Controlling N Compoundsmentioning

confidence: 99%

Taxonomy of Means and Ends in Aquaculture Production—Part 4: The Mapping of Technical Solutions onto Multiple Treatment Functions

Vilbergsson¹,

Oddsson²,

Unnþórsson³

2016

Water

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Designing aquaculture production units will require decisions on which treatment to include, e.g., the intensification of the system, and then a decision on a technical solution for each treatment function selected to implement. To complicate matters, each technical solution is not unique to each treatment function, but has a multiple effect on the system. This interaction of a technical solution to multiple treatment functions will play a part in the decision making process. Previous work by the authors has made a taxonomy of all technical solutions for the treatment function, and in this article, how technical solutions affect treatment functions is mapped. The article views the aquaculture production system as a transformation process with three sets of functions, input, treatment and output. Based on a comprehensive literature review where all technical solutions were found and categorized into a taxonomy, their effect on treatment function was mapped using a quality function deployment (QFD). The result is a matrix that gives an evaluation on the interaction. This work is a step towards an aquaculture engineering design methodology.

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“…Rearing in biofloc culture systems has proved to be an effective alternative for the reduction of aquaculture effluent emission. This occurs due to the possibility of reusing water for several cycles, using the microbial community to maintain good water quality and as additional food for the reared animals (Wasielesky et al, 2006;Silva et al, 2013;Krummenauer et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Addition of sodium nitrite and biofilm in a Litopenaeus vannamei biofloc culture system

Lara

Furtado

Hostins

et al. 2016

lajar

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ABSTRACT. This study evaluates the effects of the previous addition of sodium nitrite (NaNO2) and biofilm in a Litopenaeus vannamei biofloc culture. Five treatments were tested in 180 L -tanks: NaNO2 (-20) addition of NaNO2 for 20 days before stocking and without artificial substrates; NaNO2+B (-20) addition of NaNO2 for 20 days before stocking, with 150% additional artificial substrates; NaNO2 (Stocking) addition of NaNO2 at stocking and no artificial substrates; NaNO2 +B (Stocking) addition of NaNO2 at stocking, with 150% additional artificial substrates and; Control, without NaNO2 addition and without artificial substrates. The study was carried out in two phases: shrimps (0.21 ± 0.08 g) were stocked at a density of 400 ind m ) for 18 more days (grow-out). The turbidity and seattleable solids were higher in treatments without artificial substrates, independently of the addition of NaNO2. The ammonia and nitrite were lower in control, and the nitrate concentrations were higher in treatments with addition of NaNO2 without biofilm. At the end of the nursery, the survival was lower in treatment NaNO2 (-20), and at the end of grow-out the final biomasses were higher in treatments with addition of NaNO2 at the stocking day. In conclusion, the use of a dose of NaNO2 at the stocking day could increase the nitrite-oxidizing bacteria, and the biofilm may contribute to the reduction in suspended particles in water, enhancing shrimp production in biofloc technology system. Keywords: Litopenaeus vannamei, shrimp, biofloc, nitrogen, artificial substrates. Adición de nitrito de sodio y biofilm a un sistema de cultivo biofloc deLitopenaeus vannamei RESUMEN. Se evaluó los efectos de la adición previa de nitrito de sodio (NaNO2) y biofilm al cultivo de Litopenaeus vannamei en sistema biofloc. Se analizaron cinco tratamientos en estanques de 180 L: NaNO2 (-20) adición de NaNO2 durante 20 días antes de la siembra y sin sustratos artificiales; NaNO2+B (-20) adición de NaNO2 durante 20 días antes de la siembra y con 150% de adición de sustratos artificiales; NaNO2 (Stocking) adición de NaNO2 en la siembra y sin sustratos artificiales; NaNO2 +B (Stocking) adición de NaNO2 en la siembra y con 150% de adición de sustratos artificiales; Control sin adición de NaNO2 y sin substratos artificiales. La densidad de siembra utilizada inicialmente fue de 400 ind m -2 / 1.100 ind m -3 durante 30 días (precría). Después de este periodo, los camarones fueron sembrados a 120 ind m -2 /400 ind m -3 por más de 18 días (engorde). La turbidez y los sólidos sedimentables fueron más elevados en los tratamientos sin sustratos artificiales, independientemente de la adición del NaNO2. Las concentraciones de amonio y nitrito fueron inferiores en el control, y las concentraciones de nitrato fueron mayores con la adición de NaNO2 y sin sustratos artificiales. Después del periodo de pre-cría, la supervivencia fue menor en el tratamiento NaNO2 (-20), y al final del período de engorde las biomasas fueron más altas en los tratamientos con adición de NaNO2 en la...

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Nitrogen and Phosphorus Dynamics in the Biofloc Production of the Pacific White Shrimp, Litopenaeus vannamei

Cited by 164 publications

References 41 publications

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

<b>Association between periphyton and bioflocs systems in intensive culture of juvenile Nile tilapia

Taxonomy of Means and Ends in Aquaculture Production—Part 4: The Mapping of Technical Solutions onto Multiple Treatment Functions

Addition of sodium nitrite and biofilm in a Litopenaeus vannamei biofloc culture system

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