Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.3390/su14116607
Lizenz creative commons licence
Titel (primär) The effect of Brachionus calyciflorus (Rotifera) on larviculture and fatty acid composition of pikeperch (Sander lucioperca (L.)) cultured under pseudo-green water conditions
Autor Bischoff, A.A.; Kubitz, M.; Wranik, C.M.; Ballesteros-Redondo, L.; Fink, P.; Palm, H.W.
Journal / Serie Sustainability
Erscheinungsjahr 2022
Department ASAM; FLOEK
Band/Volume 14
Heft 11
Seite von art. 6607
Sprache englisch
Topic T5 Future Landscapes
Keywords pikeperch Sander lucioperca; pseudo-green water technique; Brachionus calyciflorus; survival; growth; fatty acid composition
Abstract A new cultivation system with the chlorophyte Monoraphidium contortum combined with a self-sustaining culture of the freshwater rotifer Brachionus calyciflorus was applied for Sander lucioperca (L.) larviculture. Survival, morphometrics, as well as fatty acid composition of pikeperch larvae were analyzed after a ten-day feeding period. By using the pseudo-green water technique with improved aeration and water movement at the surface, survival rates reached up to 94%, with a total larval length of 8.1 ± 0.3 mm and a specific length growth rate of up to 4.1% day−1 for S. lucioperca. The biochemical composition of B. calyciflorus and especially its contents in C18 PUFAs and suitable n-3/n-6 ratios met the nutritional requirements of pikeperch larvae. The high abundance of highly unsaturated fatty acids (HUFAs) in the diet appeared to be less important in the first feeding due to a possible retention of essential fatty acids, which originate from the yolk sac reserves, at adequate levels. Exponential growth of microalgae and zooplankton under the applied conditions was most effective when stocking M. contortum five days and B. calyciflorus three days before adding the fish larvae. Appropriate timing and sufficient live feed density allowed a successful integration of B. calyciflorus into pikeperch larviculture. We hypothesize that feeding pikeperch larvae with a self-sustaining Brachionus-culture under pseudo-green water conditions with minor disruptions during larviculture will improve survival and growth. This system is a first step towards pikeperch larviculture inside recirculated aquaculture systems (RAS) under continuous feed supply with live feed within the same aquaculture unit.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26206
Bischoff, A.A., Kubitz, M., Wranik, C.M., Ballesteros-Redondo, L., Fink, P., Palm, H.W. (2022):
The effect of Brachionus calyciflorus (Rotifera) on larviculture and fatty acid composition of pikeperch (Sander lucioperca (L.)) cultured under pseudo-green water conditions
Sustainability 14 (11), art. 6607