Production of lumpfish (Cyclopterus lumpus L.) in RAS with distinct water treatments: Effects on fish survival, growth, gill health and microbial communities in rearing water and biofilm

Dahle, Stine Veronica Wiborg; Bakke, Ingrid; Birkeland, Mari Båtnes; Nordøy, Kristian; Dalum, Alf Seljenes; Attramadal, Kari J.K.

doi:10.1016/j.aquaculture.2020.735097

Cited by 24 publications

(20 citation statements)

References 54 publications

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“…6A), which can explain this observed heterogeneity. Divergence between replicates is a frequently observed phenomenon during cultivation of different species, in both batch and recirculation systems (Chun et al ., 2018; Almeida et al ., 2019; Li et al ., 2019; Dahle et al ., 2020), suggesting that stochastic assembly may be a widespread characteristic of aquaculture systems. Possible causes for this stochasticity may be the regime of the disturbances through water exchanges, feed addition, so on (Santillan et al ., 2018) or the eutrophication of the water (Yang et al ., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…Molecular studies on rearing water microbiomes have shown that the community composition of these systems is dynamic over time (Xiong et al ., 2014a,b; Zheng et al ., 2017; Yan et al ., 2020) and exhibits large variability across replicate cultivations (Schmidt et al ., 2017; Chun et al ., 2018; Almeida et al ., 2019; Li et al ., 2019; Dahle et al ., 2020). The water microbiome experiences frequent disturbances through the addition of live and dry feeds, probiotics and water exchanges, each of which carries with them their own microbiome.…”

Section: Introductionmentioning

confidence: 99%

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Rearing water microbiomes in white leg shrimp (Litopenaeus vannamei) larviculture assemble stochastically and are influenced by the microbiomes of live feed products

Heyse

Props

Kongnuan³

et al. 2020

Environmental Microbiology

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The development of effective management strategies to reduce the occurrence of diseases in aquaculture is hampered by the limited knowledge on the microbial ecology of these systems. In this study, the dynamics and dominant community assembly processes in the rearing water of Litopenaeus vannamei larviculture tanks were determined. Additionally, the contribution of peripheral microbiomes, such as those of live and dry feeds, to the rearing water microbiome were quantified. The community assembly in the hatchery rearing water over time was dominated by stochasticity, which explains the observed heterogeneity between replicate cultivations. The community undergoes two shifts that match with the dynamics of the algal abundances in the rearing water. Source tracking analysis revealed that 37% of all bacteria in the hatchery rearing water were introduced either by the live or dry feeds, or during water exchanges. The contribution of the microbiome from the algae was the largest, followed by that of the Artemia, the exchange water and the dry feeds. Our findings provide fundamental knowledge on the assembly processes and dynamics of rearing water microbiomes and illustrate the crucial role of these peripheral microbiomes in maintaining health-promoting rearing water microbiomes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rearing water microbiomes in white leg shrimp (Litopenaeus vannamei) larviculture assemble stochastically and are influenced by the microbiomes of live feed products

Heyse

Props

Kongnuan³

et al. 2020

Environmental Microbiology

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“…The idea behind this procedure is to remove the fish pathogens such that the fish will stay healthier 8,9 . Counter-intuitively, experiments have shown that this disinfection actually led to poorer fish health 10,11 . Why?…”

Section: Introductionmentioning

confidence: 99%

Robust bacterial co-occurence community structures are independent of r- and K-selection history

Pettersen

Gundersen

Almaas

2021

Preprint

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Selection for bacteria which are K-strategists instead of r-strategists has been shown to improve fish health and survival in aquaculture. We considered an experiment where microcosms were inoculated with natural seawater and the selection regime was switched from K-selection (by continuous feeding) to r-selection (by pulse feeding) and vice versa. We found the networks of significant co-occurrences to contain clusters of taxonomically related bacteria having positive associations. Comparing this with the time dynamics, we found that the clusters most likely were results of similar niche preferences of the involved bacteria. In particular, the distinction between r- or K-strategists was evident. Each selection regime seemed to give rise to a specific pattern, to which the community converges regardless of its prehistory. Furthermore, the results proved robust to parameter choices in the analysis, such as the filtering threshold, level of random noise, replacing absolute abundances with relative abundances, and the choice of similarity measure. Even though our data and approaches cannot directly predict ecological interactions, our approach provides insights on how the selection regime affects the composition and workings of the microbial community, providing a basis for aquaculture experiments targeted at eliminating opportunistic fish pathogens.

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“…Breaching of the biosecurity in RAS facilities is often critical. Accumulation of waste products can cause physical stress, which could result in reduced function of the gills (Awata, Tsuruta, Yada, Iguchi, & i., 2011; Bruton, 1985; Dahle et al., 2020). Because of their delicate structure and close contact with water, the gills are particularly vulnerable for mechanical damage and injuries caused by environmental factors (Rodger, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…A baseline for mucous cell counts is fundamental in the development of a future high‐throughput monitoring programme of gill health in farmed fish. This would be of special interest in RAS facilities, where gill health has been pinpointed as one of the critical concerns (Becke, Schumann, Steinhagen, Geist, & Brinker, 2018; Dahle et al., 2020; Hjeltnes et al., 2012).…”

Section: Introductionmentioning

confidence: 99%

Variations in mucous cell numbers in gills of Atlantic salmon (Salmo salar) presmolt in commercial freshwater farms in Norway

Persson

Bjørgen

Figenschou

et al. 2020

Journal of Fish Diseases

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Traditionally, salmon (Salmo salar) smolt have been reared in landbased facilities using water from nearby rivers or lakes which flow through the production site. Flow-through farms (FT farms) depend on high water quality from the source, as means of regulating different water parameters are limited (Kristensen, Åtland, Rosten, Urke, & Rosseland, 2009). Recirculating aquaculture system (RAS) technology has developed rapidly over the last years and has been preferred in new production facilities for rearing of salmon in the freshwater stage. Because RAS technology allows close to 100% recirculation of water, it is possible to produce more fish with restricted resources (Dalsgaard et al., 2013). However, reuse of water demands efficient handling of accumulating waste products, such as particles, which

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Production of lumpfish (Cyclopterus lumpus L.) in RAS with distinct water treatments: Effects on fish survival, growth, gill health and microbial communities in rearing water and biofilm

Cited by 24 publications

References 54 publications

Rearing water microbiomes in white leg shrimp (Litopenaeus vannamei) larviculture assemble stochastically and are influenced by the microbiomes of live feed products

Rearing water microbiomes in white leg shrimp (Litopenaeus vannamei) larviculture assemble stochastically and are influenced by the microbiomes of live feed products

Robust bacterial co-occurence community structures are independent of r- and K-selection history

Variations in mucous cell numbers in gills of Atlantic salmon (Salmo salar) presmolt in commercial freshwater farms in Norway

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