Author(s): Najafpour, Babak ; Pinto, Patricia IS ; Sanz, Eric Climent ; Martinez-Blanch, Juan F. ; Canario, Adelino ; Moutou, Katerina A. ; Power, Deborah
Date: 2023
Persistent ID: http://hdl.handle.net/10400.1/20014
Origin: Sapientia - Universidade do Algarve
Subject(s): Hatchery; Marine water; Larvae; Microbiota; Ontogeny; Vibrio
16S rRNA gene sequencing and bacteria-and genus-specific quantitative PCR was used to profile microbial communities and their associated functions in water, live feed (microalgae, Artemia, and rotifer), and European sea bass and gilthead sea bream larvae from hatcheries in Greece and Italy. The transfer to larvae of genus containing potential pathogens of fish was more likely with Artemia and rotifer than with microalgae or water, irrespective of geographic location. The presence of potentially pathogenic bacteria (Vibrio and Pseudoalter-omonas) in the core microbiota of water, live feed, and fish larvae, the enrichment of different bacterial resistance pathways and biofilm formation, and the overall low beneficial bacteria load during larval ontogeny emphasizes the risk for disease outbreaks. The present data characterizing microbiota in commercial aquaculture hatcheries provides a baseline for the design of strategies to manage disease and to model or remediate potential adverse environmental impacts.
