Cheng, Ken
- Department of Molecular Sciences, Swedish University of Agricultural Sciences
Research article2016Peer reviewed
Cheng, Ken; Wagner, Liane; Moazzami, Ali; Gómez-Requeni, Pedro; Schiller Vestergren, Anna; Brännäs, Eva; Pickova, Jana; Trattner, Sofia
The Baltic Sea is one of the world's most pollution-threatened brackish environments and limited direct consumption of fatty fish from the Baltic Sea is recommended. The use of decontaminated Baltic Sea fish raw materials as fish feed could be a strategy to recycle Baltic Sea nutrients back into food chain, while relieving pressure on aqua-feed in the growing aquaculture industry. In this study, defatted fishmeal and semi-purified fish oil from the Baltic Sea were used in fish feeds for Arctic char (Salvelinus alpinus L.). The effects of the Baltic Sea-sourced fish feeds on flesh lipid quality and fish metabolomics, compared with a standard commercial feed as a control, were determined. 1H NMR-based metabolomics studies indicated disturbances in energy metabolism and hepatic toxicity in fish fed both crude fishmeal and crude fish oil, associated with up-regulation (IGF-I, GHR-I, PPARα, PPARβ1A) and down-regulation (SREBP-1 and FAS) of hepatic genes expression. The content of n-3 long chain polyunsaturated fatty acids was not affected by the decontamination process. Thus, this short-term study demonstrates that decontaminating Baltic Sea-sourced fishmeal and fish oil reduces adverse effects in Arctic char. Practical applications: Decontaminated fish materials from the Baltic Sea were shown to be promising feed ingredients for Arctic char (Salvelinus alpinus L.) compared with untreated Baltic Sea-sourced fish feed, which induced changes in fish physiology associated with energy metabolism and hepatotoxicity. Baltic Sea-sourced fish materials containing high levels of long chain polyunsaturated fatty acids are valuable feed ingredients. The Baltic Sea-sourced fishmeal (CFM and DFM) and fish oil (CFO and SPFO) were tested in fish feeds for Arctic charr (Salvelinus alpinus), compared with a commercial diet as a control. Flesh lipid quality, metabolic profile in liver and muscle and hepatic gene expression (IGF-I, GHR-I, SREBP-1, etc.) were evaluated.
Fatty acids; GHR-I; H-1 NMR metabolomics; IGF; SREBP-1
European Journal of Lipid Science and Technology
2016, Volume: 118, number: 6, pages: 862-873
SDG12 Responsible consumption and production
SDG14 Life below water
Fish and Aquacultural Science
Food Science
DOI: https://doi.org/10.1002/ejlt.201500247
https://res.slu.se/id/publ/77323