Abundance and spatial patterns over time of Vibrionaceae and Vibrio harveyi in water and biofilm from a seabass aquaculture facility

One of the major threats to seabass (Dicentrarchus labrax) aquaculture sector is development vibriosis, a disease caused mainly by bacteria from family Vibrionaceae, especially Vibrio harveyi. Given relationship between abundance in surrounding environment and prevalence fish, monitoring presence V. harveyi rearing water biofilms over time may help better understand dynamics pathogen factors that increase risk vibriosis outbreaks. In this study, spatial patterns cultivable Vibrionaceae tanks cold- hot-water inlets supplying farm were monitored for 7 months, April October 2018. Several potential pathogens isolated: Photobacterium damselae, alginolyticus, harveyi, owensii rotiferianus. Nevertheless, remained most problematic pathogen: its constant throughout sampling campaign represents More precisely, has been found farm, biofilm samples. Besides, positive correlation temperature suggests increasing outbreaks fish farms. Overall, obtaining qualitative data regarding relative diversity viable culturable quantitative on facility essential first step designing new solutions manage vibriosis.