Dynamics of Water and Biofilm Bacterial Community Composition in a Mediterranean Recirculation Aquaculture System

Recirculation technology has been emerging in the marine aquaculture industry. The microbiome developed recirculation systems (RASs) is an important factor for optimal operation of these and fish welfare. In this study, microbial community dynamics water column biofilms a RAS with Mediterranean species gilthead sea bream bass were investigated, while physicochemical conditions also monitored. Microbiological, culture, non-culture analyses based on PCR-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) fingerprints performed biofilm stainless-steel surfaces. According to obtained results, feed administration seemed cause changes pH TAN, as well drive bacterial abundance column. Tested surfaces colonized within 24 h sessile cells stabilized terms density 6 days. DGGE indicated stability dynamic succession biofilms. pathogen Tenacibaculum discolor was found colonize main findings confirmed that can be used control strategy community, there dominant communities, pathogenic bacteria latter.