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Development of probiotics for the production of turbot in recirculation aquaculture systems
Project
Project code: 2817303710
Contract period: 01.07.2012
- 31.08.2015
Budget: 135,087 Euro
Purpose of research: Experimental development
Probiotics have the potential to promote aquaculture development by increasing production efficiency in a sustainable manner, making use of beneficial live bacterial cells. In the present project the potential of native probiotic feed additives in recirculation based aquaculture of turbot was explored to increase growth performance and feed conversion and improve animal health and immune status. First, probiotic candidates isolated and cultured were tested in vitro for microbial antagonism towards the well-known pathogen Tenacibaculum maritimum as well as the conversion of saponin a soy derived antinutrient. To assess these beneficial effects in vivo, a cost effective, easy to perform coating procedure was developed demonstrating the viability/survival of the probiotics over months. Subsequently, five different isolates with a proven inhibition towards T. maritimum were analyzed in a combined feeding and challenge trial. A significant control of the pathogenesis was unfortunately not achieved by one of the candidates. In an additional feeding trial at high proportions of soybean meal replacing fish meal within the experimental diet six probiotic strains were tested for counteracting enteritis. A significant improvement of growth performance and feed conversion was not observed despite their ability to metabolize saponin in vitro.
Section overview
Subjects
- Recirculation systems
