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Fish growth and health aspects of sea bass(Dicentrarchus labrax) reared in standard vs. high rate algal pondrecirculation systems
Published online by Cambridge University Press: 25 June 2010
Abstract
Recirculation aquaculture system (RAS) is the type of land-based aquaculture productionthat interferes the least with the environment, particularly due to low effluent volumeand overall water requirement. Water reuse, sometimes limited by the accumulation of wasteproducts excreted by fish, can be improved by incorporating another biotechnical componentin the form of high rate algal pond (RAS+HRAP), thus adding to the economy and selfsustainability of the system. Our goal was to evaluate whether rearing fish for 1 year ina RAS or RAS+HRAP led to differences in fish production and health, by assessing: (1) fishgrowth; (2) impact on the morphological structure of sea bass target tissues (liver,kidney, and spleen); (3) susceptibility to monogenean parasites; (4) resistance topathogen challenge with Listonella anguillarum; and (5) total bloodprotein. Over the one-year experimental period, sea bass showed no statistical differencesin any parameter evaluated, suggesting that there was a satisfactory purification rate inthe RAS+HRAP system.
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- © EDP Sciences, IFREMER, IRD 2010
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