Effect of different carbon sources on microbial community structure and composition of ex-situ biofloc formation

Wei, Yan-fang; Wang, An‐Li; Liao, Shiping

doi:10.1016/j.aquaculture.2019.734492

Cited by 49 publications

(30 citation statements)

References 55 publications

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“…Flavobacteriia can form the biofloc shape by producing glue‐like extracellular polymers that can bind bacteria and other cells together in biofloc (Jiang, Ren, Li, Dong, & Tian, 2020; Wei, Liao, & Wang, 2016). Rhodobacter can also form biofilm that has been found to have beneficial microbial effects in aquaculture systems (Hjelm, Riaza, Formoso, Melchiorsen, & Gram, 2004; Wei, Wang, & Liao, 2019).…”

Section: Discussionmentioning

confidence: 99%

Comparison between recirculating aquaculture and biofloc systems for rearing juvenile common carp ( Cyprinus carpio ): Growth performance, haemato‐immunological indices, water quality and microbial communities

et al. 2020

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In a 2‐month trial, four different aquaculture systems, viz., (a) rearing at 50% daily water exchange without filtration (WE), (b) biofloc system (BFT1), without water exchange or filtration, (c) biofloc system (BFT2), similar to BFT1 but 10% of daily feed deducted, and (d) recirculating system (RAS), without water exchange, were compared through monitoring water quality as well as measuring the growth, haematological and immunological indices of common carp (Cyprinus carpio). Metagenomics was also applied to characterize the microbial profile of the waters through screening 16S rDNA gene sequences. BFT systems demonstrated lower values of pH, dissolved oxygen but did higher concentration of total suspended solid (TSS) and 5‐day biochemical oxygen demand (BOD5). No significant change was observed in haematocrit, haemoglobin, albumin, total protein and total cholesterol of the fish kept in all treatments. Metagenomics analysis revealed the highest abundance for Proteobacteria in BFT1, BFT2 and RAS systems, whereas Firmicutes was the dominant phylum in WE treatment. At the genus level, Flavobacterium (in BFT treatments), Sphingobacterium (RAS) and Rhodoluna (WE treatment) were the dominant bacteria. Taken together, BFT treatments could improve water quality and feed utilization. Moreover, BFT and RAS rearing conditions might change microbial structure of water.

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Section: Discussionmentioning

confidence: 99%

Comparison between recirculating aquaculture and biofloc systems for rearing juvenile common carp ( Cyprinus carpio ): Growth performance, haemato‐immunological indices, water quality and microbial communities

et al. 2020

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“…In fish farming, heterotrophic bacteria directly and rapidly convert accumulated ammonia into bacterial protein, which is reflected in the levels of this product in the sediments (Ebeling et al, 2006). Moreover, microalgae, protozoa, rotifer, oligochaetea detritus and dead organic particles are constantly observed in the sedimentable flocs and can serve as protein sources (Azim & Little, 2008;Wei et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Proximal and sensory analysis of red tilapia (Oreochromis sp.) fed with fish tanks sediments from a Biofloc culture

Delgado

Rubio²,

Cueva-Quiroz³

2021

Food Sci. Technol

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Feeding accounts for 50%-60% of production costs in fish farming, and alternative raw materials are used to lower production costs. These raw materials can alter nutritional values and sensory aspects of the final product. The present study describes the results for the proximal composition, sensory, and microbiological analyses of red tilapia (Oreochromis sp.) fed with a biofloc meal (fish sediment residue). The results showed that the red tilapia biofloc meal contained protein levels over 30%, with 3% nitrogen and 6% calcium. Fish fed biofloc meal showed productive performances within the ranges established for the species. Sensory analysis revealed that the cooked product's appearance was very characteristic, presenting a slight metallic flavor and moderate juiciness. The bromatological composition analysis indicated that each 100g of tilapia contained 16 g of protein. Finally, the microbiological study guarantees compliance with the local tandards and confirms that the product does not contain significant levels of microorganisms that could cause foodborne diseases when consumed by humans. In conclusion, the use of biofloc meal at a small red tilapia farm proved to be a sustainable alternative for feeding Oreochromis sp.

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“…Since carbonaceous substrates affect the metabolism of bacteria in BFT systems (Wei et al 2020), they can also influence their cell counts or numbers (Panigrahi et al 2019). However, studies describing the relationship between carbon source type and bacterial numbers in biofloc aquaculture systems are currently inadequate.…”

Section: Bacterial Numbersmentioning

confidence: 99%

“…The development of molecular and high-throughput sequencing techniques has enabled an advanced understanding of the relationship between carbon sources and microbial composition in biofloc systems (Lv et al 2014;Li et al 2018). Wei et al (2020) recently found that glucose, glycerol and starch promote the dominance of bacteria groups, such as Proteobacteria and Bacteroidetes, which together compose more than 70% of the overall bacterial community, while other less represented groups include Planctomycetes, Actinobacteria and Verrucomicrobia (Table 3). Using brown sugar as the sole carbon source, Deng et al (2019) also reported Proteobacteria as being the dominant bacteria phylum (>67%).…”

Section: Relative Abundancementioning

confidence: 99%

Supplemental carbon sources applied in biofloc technology aquaculture systems: types, effects and future research

Abakari

Luo

Kombat

et al. 2020

Reviews in Aquaculture

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Biofloc technology (BFT) systems have been driven towards increased sustainability in the last decade. BFT depends on maintenance of the optimal carbon-to-nitrogen (C/N) ratio through supplementation with organic carbon sources. The types of carbon sources and addition strategies are critical considerations in BFT systems. Thus for the purpose of this review, a thorough search of the literature was conducted to gather relevant information from reliable sources, ranging from reputable journals to books and useful reports in the field of BFT. Keywords used for the literature search include: 'biofloc technology systems', 'carbon sources', 'solid carbon sources', 'effects of carbons sources', 'carbon source addition strategies', 'nutritional quality of bioflocs', 'carbon sources and water quality', 'C/N ratio in BFT', and 'carbon sources and bacterial community'. Among the several peer-reviewed articles, books and technical reports consulted, 147 (dated from 1987 to 2020) were relevant for the preparation of this review. The current review thus examines the subject of supplemental carbon sources in BFT systems and discusses the various effects of their application with respect to the culture organism, microorganisms, water quality and the nutritional quality of flocs. The benefits and challenges associated with the types of carbon sources used in BFTs are also presented. Suggested organic carbon sources and their addition strategies are provided, and further research directions are proposed.

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Effect of different carbon sources on microbial community structure and composition of ex-situ biofloc formation

Cited by 49 publications

References 55 publications

Comparison between recirculating aquaculture and biofloc systems for rearing juvenile common carp ( Cyprinus carpio ): Growth performance, haemato‐immunological indices, water quality and microbial communities

Comparison between recirculating aquaculture and biofloc systems for rearing juvenile common carp ( Cyprinus carpio ): Growth performance, haemato‐immunological indices, water quality and microbial communities

Proximal and sensory analysis of red tilapia (Oreochromis sp.) fed with fish tanks sediments from a Biofloc culture

Supplemental carbon sources applied in biofloc technology aquaculture systems: types, effects and future research

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