Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/8812
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Complete replacement of fish oil with a blend of vegetable oils affects dioxin, dioxin-like polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in 3 Atlantic salmon (Salmo salar) families differing in flesh adiposity
Authors: Bell, J Gordon
Dick, James R
Strachan, Fiona
Guy, Derrick R
Berntssen, Marc H G
Sprague, Matthew
Contact Email: j.r.dick@stir.ac.uk
Keywords: Persistent organic pollutants
Farmed Atlantic salmon
Alternative dietary oils
Genetic strain or family
Vegetable oil
Food safety
Issue Date: 12-Jan-2012
Publisher: Elsevier
Citation: Bell JG, Dick JR, Strachan F, Guy DR, Berntssen MHG & Sprague M (2012) Complete replacement of fish oil with a blend of vegetable oils affects dioxin, dioxin-like polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in 3 Atlantic salmon (Salmo salar) families differing in flesh adiposity, Aquaculture, 324-325, pp. 118-126.
Abstract: The benefits of consuming a diet rich in seafood are nowwell respected and are based not only on the high levels of long-chain n−3 polyunsaturated fatty acids (LC n−3 PUFA) but also due to the range of beneficial macro and micronutrients present in fish. Atlantic salmon culture is now established globally and is a major source of highquality oil rich in LC n−3 PUFA. However, salmon flesh can accumulate persistent organic pollutants (POPs), including dioxins and furans (PCDD/Fs), dioxin-like polychlorinated biphenyls (DL-PCBs) and polybrominated diphenyl ethers (PBDEs) that are derived from marine feed components, especially fish oil (FO). The aim of this study was to grow salmon smolts on alternative diets with a reduced FM level, that contained either 100% of added oil as FO or a blend of vegetable oils (VO), over a full production cycle and to assess the effects of these diets on POP deposition. Three families of salmon were used with two being chosen as being either "Lean" or "Fat", based on flesh adiposity derived from a breeding programme, while the third (CAL) was a mix of non-pedigreed commercial families. Fish were ongrown for 55 weeks when they reached 3 kg followed by a switch to a decontaminated FO for a further 24 weeks to restore LC n−3 PUFA levels in the VO-fed fish. The average sumflesh PCDD/Fs, across the 3 salmon strains,were reduced from1.94±0.01 ng TEQ/kg in the fish fed FO to 0.46±0.02 ng TEQ/kg in the fish fed VO. The sum PBDEswere reduced from 2.82±0.24 ng/g in the FO fish to 0.52 ng/g in the VO fish. Average reduction in sumPCDD/Fs, DL-PCBs and PBDEswas 52, 79 and 82%, respectively, in the VO fed salmon. Therewas evidence of higher PBDE retention in the Fat fish but thiswas not significant. This study shows that salmon can be produced with very low levels of POPs and that concentrations can be reduced significantly by the careful selection of rawmaterials. The use of decontaminated fish oils has an important role in this process although care should be taken to use oils that are treated with protocols that reduce PCCD/Fs, DLPCBs and PBDEs to ensure very low levels of POPs in commercial salmon.
Type: Journal Article
URI: http://hdl.handle.net/1893/8812
DOI Link: http://dx.doi.org/10.1016/j.aquaculture.2011.11.004
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Aquaculture
Aquaculture
Aquaculture
Landcatch Natural Selection Ltd
National Institute of Nutrition and Seafood Research (NIFES)
Aquaculture

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