Abstract
Swedish aquaculture is a growing industry that faces significant environmental and fish health challenges . Climate change and seasonal variations exacerbate these problems by promoting harmful bacteria in warmer waters and altering biofilm composition, increasing the risk of disease and fish mortality . Understanding the role of microbes and water quality in fish farms is crucial . The study was conducted to monitor the changes in microbial composition over the time in different fish culture systems. The microbial and water samples were collected from three farms situated in different parts of Sweden operating on recirculatory aquaculture (RAS) and flow through (FT) systems. Biofilms were collected from the inlet and fish tank once a week. The result s shows that the overall abundance of microbiome is different for all the three fish farms. The RAS system was dominated by genus Cypionkella , Rhodoferax , Flavobacterium , Pseudomonas whereas FT were dominated by Cypionkella , Flavobacterium , Fuscovulum . The clustering pattern of microbial communities sh ows that there w ere differences in composition for the inlet and fish tanks for respective farms. Previous studies suggests that Pseudomonas and Flavobacterium are more linked to stress related fish diseases and other gene ra like Rhodoferax has diverse metabol ic functions and can play role in aquatic environment where fish are cultured, and therefore, may influence fish health. Thus, by unravelling complex relationships, the study can provide insights to lower the negative impacts of climate change and seasonal variations on fish health and productivity . This will help to safeguard both the environment and the global food supply.
Acknowledgement : The project is funded by the Swedish Board of Agriculture.
Aprajita.singh@chalmers.se