The Effect of Brachionus calyciflorus (Rotifera) on Larviculture and Fatty Acid Composition of Pikeperch (Sander lucioperca (L.)) Cultured under Pseudo-Green Water Conditions

A new cultivation system with the chlorophyte Monoraphidium contortum combined a self-sustaining culture of freshwater rotifer Brachionus calyciflorus was applied for Sander lucioperca (L.) larviculture. Survival, morphometrics, as well fatty acid composition pikeperch larvae were analyzed after ten-day feeding period. By using pseudo-green water technique improved aeration and movement at surface, survival rates reached up to 94%, total larval length 8.1 ± 0.3 mm specific growth rate 4.1% day−1 S. lucioperca. The biochemical B. especially its contents in C18 PUFAs suitable n-3/n-6 ratios met nutritional requirements larvae. high abundance highly unsaturated acids (HUFAs) diet appeared be less important first due possible retention essential acids, which originate from yolk sac reserves, adequate levels. Exponential microalgae zooplankton under conditions most effective when stocking M. five days three before adding fish Appropriate timing sufficient live feed density allowed successful integration into We hypothesize that Brachionus-culture minor disruptions during larviculture will improve growth. This is step towards inside recirculated aquaculture systems (RAS) continuous supply within same unit.