The effect of different alkalinity levels on Litopenaeus vannamei reared with biofloc technology (BFT)

Furtado, Plínio Schmidt; Poersch, Luís; Wasielesky, Wilson

doi:10.1007/s10499-014-9819-x

Cited by 85 publications

(58 citation statements)

References 26 publications

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“…The lower alkalinity levels in BL treatment indicate there was an increase in heterotrophic and nitrifying bacterial growth and thereby a greater alkalinity consumption in this treatment. Furthermore, the values of pH and alkalinity were within the recommended range to L. vannamei (Furtado et al 2011(Furtado et al , 2015a.…”

Section: Discussionsupporting

confidence: 53%

“…2 Mean nitrite concentrations along the study using different aerators in L. vannamei BFT culture system Aquacult Int low DO concentrations (0.82 mg DO L -1 ) coupled with a high temperature (34.4°C) in one of the experimental tanks likely contributed to the low shrimp survival observed. The pH and alkalinity were closely related parameters, and in BFT systems, there is a decrease in both throughout the culture, mainly because of the consumption of inorganic carbon by the heterotrophic and nitrifying bacteria and the growth of shrimp (Ebeling et al 2006;Furtado et al 2015a). The lower alkalinity levels in BL treatment indicate there was an increase in heterotrophic and nitrifying bacterial growth and thereby a greater alkalinity consumption in this treatment.…”

Section: Discussionmentioning

confidence: 99%

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The use of different aerators on Litopenaeus vannamei biofloc culture system: effects on water quality, shrimp growth and biofloc composition

et al. 2016

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This study evaluated the effects of different aeration types on water quality, shrimp growth and biofloc composition in a Litopenaeus vannamei culture. The study was conducted with three treatments: (1) PR-propeller aspirator pump aerator; (2) VP-vertical pump aerator; and (3) BL-diffused air blower. The study was performed in a greenhouse with nine 35,000-L rectangular tanks. Water quality parameters (temperature, salinity, dissolved oxygen, pH, ammonia, nitrite, nitrate, settleable and suspended solids) were measured along the 33 experimental days. Moreover, samples were collected to quantify the microorganisms present in the tanks. At the end of the study, samples of the biofloc of each tank were collected to proximal analysis. Throughout the experiment, the temperature, pH, salinity and alkalinity were maintained within the recommended levels for L. vannamei. The propeller treatment showed a concentration of total ammonia above the recommended levels and lower densities of ciliates and flagellates, most likely because of inadequate biofloc formation in this treatment. The final weight was higher in the blower and propeller treatments. However, survival was lower in the propeller treatment compared to the other treatments. The results of this study suggest that diffused air systems (air blower) improve the formation of biofloc and growth performance of L. vannamei.

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Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

The use of different aerators on Litopenaeus vannamei biofloc culture system: effects on water quality, shrimp growth and biofloc composition

et al. 2016

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“…Generally speaking, the survival of marine shrimp are relatively high in BFT. Xu, Pan, Sun and Huang () and Furtado, Poersch and Wasielesky () observed survival above 86 and 85% respectively. While the value of survival in this study is lower, and similar results were also obtained by Furtado et al .…”

Section: Discussionmentioning

confidence: 90%

Effect of using sodium bicarbonate to adjust the pH to different levels on water quality, the growth and the immune response of shrimpLitopenaeus vannameireared in zero-water exchange biofloc-based culture tanks

et al. 2015

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Effect of using sodium bicarbonate to adjust the pH to different levels on water quality, the growth and the immune response of shrimp Litopenaeus vannamei reared in zero-water exchange biofloc-based culture tanks AbstractThe bioflocs technology proved to be a sustainable technique used in zero-water exchange shrimp culture systems. However, the pH and alkalinity may decrease due to the biofloc formation process and Nitrification. A 48-day experiment was performed to investigate the effects of different pH (7.1-7.6; 7.6-8.1) conditions on water quality, the growth and the health status of shrimp in biofloc technology (BFT) through using sodium bicarbonate to adjust pH respectively. Two pH treatments and one control were compared: T0control, T1 -pH 7.6 -NaHCO 3 , T2 -pH 8.1 -NaHCO 3 , each treatment consisted of three replicate tanks (90 L water volume) and each replicate stocked with 30 shrimp (equivalent to 333 shrimp m À3 ). Significant physical, chemical and biological differences (P < 0.05) were detected among treatments. At the end of the experiment, water quality, the growth and the immune response of shrimp in control were significantly lower (P < 0.05) than the other treatments. Moreover, the T2 treatment had a better performance in these three aspects. The results indicated that it was necessary to adjust the pH and alkalinity in the BFT, and a higher pH as well as alkalinity for shrimp growth and the stability of the BFT were more favourable.

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“…Both the pH and the alkalinity decreased throughout the experiment, and this trend is common in BFT, due to the high metabolic rate of bacteria present in the system [39]. In spite of the fact that low alkalinity can negatively affect the nitrification process [57], the lowest levels were observed at the end of the experiment, just when the system was mature. In this moment, TAN and nitrites did not accumulate in the water column.…”

Section: Effects On the Biofloc Systemmentioning

confidence: 86%

The Role of Bacillus amyloliquefaciens on Litopenaeus vannamei During the Maturation of a Biofloc System

Llario

Falco

Sebastiá-Frasquet

et al. 2019

JMSE

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Biofloc technology is a sustainable aquaculture production system which uses microorganisms to maintain water quality and to increase productivity. In this system, probiotics can enhance the positive effects of bioflocs on the cultured species. The objective of this research is to study the role of the probiotic bacterium Bacillus amyloliquefaciens during the formation of a biofloc system for the culture of Litopenaeus vannamei. Two doses of probiotic were assayed and applied directly to the water. The experiment was developed in nine tanks distributed as follows: Three control tanks with no probiotic, three tanks with a probiotic dose of 103 cfu/mL, and three tanks with a dose of 104 cfu/mL. Water quality, microbial activity, growth parameters and the immune system state of shrimps were monitored throughout the maturation process. The results indicate a positive effect upon the shrimp immune system throughout the study period, where specifically there was an increase in granular hemocytes in the shrimp hemolymph. During the immature biofloc phase, granular hemocytes were 5% higher in tanks supplemented with the probiotic. During the mature biofloc phase, granular hemocytes were 7% higher in those same tanks. During the maturation of the biofloc, environmental conditions are more unfavorable for shrimp growth, due to the accumulation of nitrites. So, the effect of the probiotic is especially important during this stage when the shrimp are stressed and are more vulnerable to diseases. However, the effects on microbial activity, water quality and Litopenaeus vannamei growth did not increase the benefits of the biofloc system.

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The effect of different alkalinity levels on Litopenaeus vannamei reared with biofloc technology (BFT)

Cited by 85 publications

References 26 publications

The use of different aerators on Litopenaeus vannamei biofloc culture system: effects on water quality, shrimp growth and biofloc composition

The use of different aerators on Litopenaeus vannamei biofloc culture system: effects on water quality, shrimp growth and biofloc composition

Effect of using sodium bicarbonate to adjust the pH to different levels on water quality, the growth and the immune response of shrimpLitopenaeus vannameireared in zero-water exchange biofloc-based culture tanks

The Role of Bacillus amyloliquefaciens on Litopenaeus vannamei During the Maturation of a Biofloc System

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