Geosmin depuration from fish

Schram, E.

doi:10.18174/531865

Cited by 1 publication

(2 citation statements)

References 94 publications

(310 reference statements)

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“…Moreover, removal of the geosmin from the water, for example by air stripping or accumulation into the fish tissues, suspended solids or other compartments or even degradation through microbial activity could also explain this lack of correlation (Azaria et al, 2017). Absorption by the fish is known to be complex and influenced by multiple factors such as the geosmin concentration in the water, the fish intestine and the amount of geosmin already present in the tissue as well as the lipid content of the fish (Lukassen et al, 2019; Schram, 2020). Moreover, a large amount of geosmin producers are likely sequestered inside biofilms and the condition within these biofilms is likely to differ from that in the water.…”

Section: Discussionmentioning

confidence: 99%

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Impact of water quality parameters on geosmin levels and geosmin producers in European recirculating aquaculture systems

Lukassen

Menanteau–Ledouble

Jonge

et al. 2022

Journal of Applied Microbiology

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Aims Geosmin is associated with off‐flavour problems in recirculating aquaculture systems (RAS) and represents an economic problem for the aquaculture industry. This study aims at investigating factors influencing the composition of the bacterial microbiota, in particular the presence of geosmin producers and the environmental and farming factors favouring geosmin accumulation. Methods and Results Several water quality parameters were correlated to the composition of the microbiota with special emphasis on the presence of geosmin producers within 26 different RAS from four European countries. Three novel groups of geosmin‐producing bacteria were quantified to identify potential correlations with geosmin concentration. Conclusions The microbiome differed significantly between systems. However, phosphate levels, calcium levels and redox potential correlated to geosmin concentration in the water and the presence of the Actinomycetales geosmin‐producers but not with the presence of other groups of geosmin‐producing bacteria. Oxygen levels and conductivity were found to negatively correlate with geosmin concentration. A large proportion of the detected geosmin producers represented novel taxonomic groups not previously linked with this activity. Significance and Impact of the Study These results improve our understanding of the diversity of microbiota in RAS and the water quality parameters favouring the populations of geosmin‐producing bacteria and the production of geosmin.

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Section: Discussionmentioning

confidence: 99%

“…This could suggest some difference between the water quality parameters measured and those experienced by the microorganisms. The dynamics of geosmin in RAS are complex and still poorly characterized (Schram, 2020).…”

Section: Discussionmentioning

confidence: 99%