Effects of Biofloc Promotion on Water Quality, Growth, Biomass Yield and Heterotrophic Community in<i>Litopenaeus Vannamei</i>(Boone, 1931) Experimental Intensive Culture

Luis-Villaseñor, Irasema E.; Voltolina, Doménico; Audelo-Naranjo, Juan Manuel; Pacheco-Marges, María del Rosario; Herrera-Espericueta, Víctor E.; Romero-Beltrán, Emilio

doi:10.4081/ijas.2015.3726

Cited by 26 publications

(25 citation statements)

References 40 publications

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“…In addition, Luis‐Villaseñor et al. () observed phosphorus levels that were 63% smaller in BFT when compared with traditional systems for shrimp ( Litopenaeus vannamei ) culture.…”

Section: Discussionmentioning

confidence: 99%

Crude protein levels in diets for two growth stages of Nile tilapia (Oreochromis niloticus) in a biofloc system

et al. 2018

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Biofloc technology (BFT) provides an additional feed source for aquatic organisms through the conversion of waste in microbial flocs. Because of this, the suitable protein level in a diet for animals in this system could be different from those in conventional systems. Our objective was to determine the suitable protein level in the diet of Nile tilapia juveniles reared with BFT. Two experiments were carried out with tilapia weighing~10 g (first experiment) and about 50 g (second experiment) during 61 and 98 days respectively. Five crude protein (CP) levels (within 17% and 33%) were tested. The increment of CP resulted in a reduction in dissolved oxygen, pH, alkalinity and an increase in dissolved phosphorus, total suspended solids and total ammonium nitrogen. The crude protein level had a significant effect (p < 0.05) on animal performance. The linear response plateau model was the best fit for the final weight and weight gain data in the two growth phases. In conclusion, tilapia juveniles of 10-60 g and 60-230 g in biofloc can be fed on diets with 28% of CP (26% of digestible protein) and 22% CP (20% of digestible protein) respectively. K E Y W O R D Sbiofloc technology, growth performance, Nile tilapia, nutrition

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“…In addition, Luis‐Villaseñor et al. () observed phosphorus levels that were 63% smaller in BFT when compared with traditional systems for shrimp ( Litopenaeus vannamei ) culture.…”

Section: Discussionmentioning

confidence: 99%

Crude protein levels in diets for two growth stages of Nile tilapia (Oreochromis niloticus) in a biofloc system

et al. 2018

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“…Additionally, the biofloc maintained at C/N ratio of 15 resulted in significantly lower food conversion ratio (FCR) as compared to the control ( Table 2). These results suggest that biofloc is an effective method to improve culture environment and nutrition of the cultured shrimp and the beneficial effect of biofloc is paralleled with improved water quality and growth performance of shrimp in biofloc system (Ekasari et al, 2014;Luis-villaseñor et al, 2016;Bossier and Ekasari, 2017;Lee et al, 2017).…”

Section: Biofloc Improves Water Quality and Growth Performance Of L mentioning

confidence: 86%

Biofloc-Based Enhanced Survival of Litopenaeus vannamei Upon AHPND-Causing Vibrio parahaemolyticus Challenge Is Partially Mediated by Reduced Expression of Its Virulence Genes

et al. 2020

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The biofloc system is a relatively new aquaculture technology that offers practical solution to maintain culture water quality by recycling nutrients and improves the health status and resistance of shrimps against microbial infection, yet the mode of action involved remains unclear. This study aimed to unravel the underlying mechanism behind the protective effect of a biofloc system using Litopenaeus vannamei and acute hepatopancreatic necrosis disease (AHPND)-causing Vibrio parahaemolyticus M0904 strain as a host-pathogen model. The results showed that a biofloc system maintained at a C/N ratio of 15, improves the water quality and contributes to the nutrition of cultured animals as bioflocs might serve as an additional protein source. Furthermore, the study demonstrated that the biofloc system enhances the survival of L. vannamei upon challenge with a V. parahaemolyticus AHPND strain. Remarkably, the results highlight that in the biofloc system, AHPND-causing V. parahaemolyticus possibly switch from free-living virulent planktonic phenotype to a non-virulent biofilm phenotype, as demonstrated by a decreased transcription of flagella-related motility genes (flaA, CheR, and fliS), Pir toxin (PirB VP), and AHPND plasmid genes (ORF14) and increased expression of the phenotype switching marker AlkPhoX gene in both in vitro and in vivo conditions. Taken together, results suggest that biofloc steer phenotype switching, contributing to the decreased virulence of V. parahaemolyticus AHPND strain toward shrimp postlarvae. This information reinforces our understanding about AHPND in a biofloc setting and opens the possibility to combat AHPND not only by trying to eliminate the AHPND-causing V. parahaemolyticus from the system but rather to steer the phenotypic switch.

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“…Serial dilution (10 –5 ) was immediately carried out using physiological saline (0.85% of NaCl). After dilution, 0.1 ml of subsamples was plated, in duplicate, on trypticase soy agar (TSA), thiosulphate–citrate–bile salts–sucrose agar (TCBS), tergitol‐7 agar, Aeromonas agar and Lactobacillus MRS agar for total bacteria, presumptive Vibrio, total coliforms, Aeromonas bacteria and Bacillus respectively (APHA, 2005; Luis‐Villasenor et al., 2015). On the same day of water sampling, randomly five fish were collected for gut bacterial count study.…”

Section: Methodsmentioning

confidence: 99%

Study on floc characteristics and bacterial count from biofloc‐based genetically improved farmed tilapia culture system

Yuvarajan

2020

Aquaculture Research

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The present study endeavoured to investigate the efficacy of biofloc technology (BFT) and clear water system (CWS) on nursery rearing of genetically improved farmed tilapia (GIFT). The study used outdoor lined pond (0.01 ha), in duplicate, to explore the bacterial community in culture water and gut flora of GIFT and floc characteristics of both systems. Each pond was stocked with 5,000 numbers (0.2 ± 0.02 g/fish) of GIFT fry and reared for 30 days. Biofloc, with carbon: nitrogen ratio of 10:1, was developed and maintained using distillery spent wash (DSW) as organic carbon source and provided with intensive aeration. Total heterotrophic bacteria (THB), Vibrio and Bacillus count of culture water and gut samples were significantly (p < .05) differed between BFT and CWS. Floc volume, size, settling velocity, porosity and floc volume index were documented from BFT system. Plankton count was significantly differed (p < .05) between the BFT and CWS. BFT showed pleiotropic beneficial effect on rearing medium and species health through colonization of probiotic heterotrophic bacteria and elimination of pathogenic bacteria in the gut. Novelty of floc characteristics measured in the present study would help to form the base clue for the scientific understanding of biofloc system which paves to promote the BFT as sustainable aquaculture practice.

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Effects of Biofloc Promotion on Water Quality, Growth, Biomass Yield and Heterotrophic Community inLitopenaeus Vannamei(Boone, 1931) Experimental Intensive Culture

Cited by 26 publications

References 40 publications

Crude protein levels in diets for two growth stages of Nile tilapia (Oreochromis niloticus) in a biofloc system

Crude protein levels in diets for two growth stages of Nile tilapia (Oreochromis niloticus) in a biofloc system

Biofloc-Based Enhanced Survival of Litopenaeus vannamei Upon AHPND-Causing Vibrio parahaemolyticus Challenge Is Partially Mediated by Reduced Expression of Its Virulence Genes

Study on floc characteristics and bacterial count from biofloc‐based genetically improved farmed tilapia culture system

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