Universität zu Köln

Bischoff, Adrian A., Kubitz, Melanie, Wranik, Claudia M., Ballesteros-Redondo, Laura, Fink, Patrick ORCID: 0000-0002-5927-8977 and Palm, Harry 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). BASEL: MDPI. ISSN 2071-1050

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bischoff, Adrian A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kubitz, Melanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Wranik, Claudia M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ballesteros-Redondo, Laura UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Patrick UNSPECIFIED orcid.org/0000-0002-5927-8977 UNSPECIFIED Palm, Harry W. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-678411
DOI:	10.3390/su14116607
Journal or Publication Title:	Sustainability
Volume:	14
Number:	11
Date:	2022
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2071-1050
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language STRESS TOLERANCE; ALGAL ADDITION; BALTIC SEA; GROWTH; MARINE; FISH; LARVAE; LIPIDS; SURVIVAL; PALLAS Multiple languages Green & Sustainable Science & Technology; Environmental Sciences; Environmental Studies Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67841