Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/31494
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Variation in the nutritional composition of farmed Atlantic salmon (Salmo salar L.) fillets with emphasis on EPA and DHA contents
Author(s): Sprague, Matthew
Fawcett, Samuel
Betancor, Monica
Struthers, William
Tocher, Douglas
Contact Email: m.b.betancor@stir.ac.uk
Keywords: farmed Atlantic salmon
aquaculture, EPA+DHA, selenium
retailer, consumers
Issue Date: Dec-2020
Citation: Sprague M, Fawcett S, Betancor M, Struthers W & Tocher D (2020) Variation in the nutritional composition of farmed Atlantic salmon (Salmo salar L.) fillets with emphasis on EPA and DHA contents. Journal of Food Composition and Analysis, 94, Art. No.: 103618. https://doi.org/10.1016/j.jfca.2020.103618
Abstract: The increase in the global popularity and production of farmed Atlantic salmon (Salmo salar L.) has led to compositional changes in their feeds that can potentially diminish their nutritive value. Thus, the aim of the study was to compare the lipid, protein, fatty acid (omega-3) and mineral contents of salmon fillet portions available in the UK and estimate their contribution towards consumer dietary intake levels. Twenty pre-packaged fresh salmon fillets, encompassing all ranges (value, standard, premium and organic) and farmed origins (Scotland and Norway) were purchased from 10 main UK-wide retailers and analysed for their nutritional compositions. Lipid contents were between 11.2-16.3% wet weight (ww), except the Retailer 10 value product which was significantly lower due to a high proportion of tail pieces. No difference in protein contents (17.5-20.2% ww) were observed between fillets. However, fatty acid profiles showed marked variations between samples with marker fatty acids 18:1n-9 (24.3-42.0%), 18:2n-6 (8.3-15.1%) and 18:3n-3 (2.6-8.1%) reflecting the differing levels of vegetable oil inclusion and eicosapentaenoic and docosahexaenoic acids (EPA+DHA, 5.6-16.6%) indicating the level of marine oils included within salmon feeds. Consequently, EPA+DHA contents varied from 0.88 to 2.36 g EPA+DHA.130 g-1 flesh ww, equivalent to supplying 26 to 67% of the recommended 3.5 g EPA+DHA weekly intake suggested for optimal cardiac health in adults. Similarly, selenium contents differed significantly between samples delivering between 13.9-55.5% and 17.3-69.3% of the 75 and 60 μg.day-1 UK intake for males and females, respectively. Additionally, EPA+DHA and selenium contents were both affected by farmed origin, reflecting differences in production strategies of the two salmon producing nations. Overall, the study highlights the contrasting nutritional profiles of farmed salmon fillets available to consumers based on retailer requirements (healthy versus sustainable product) and how this can affect the recommended dietary intakes from a human nutrition perspective.
DOI Link: 10.1016/j.jfca.2020.103618
Rights: This item has been embargoed for a period. During the embargo 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. Accepted refereed manuscript of: Sprague M, Fawcett S, Betancor M, Struthers W & Tocher D (2020) Variation in the nutritional composition of farmed Atlantic salmon (Salmo salar L.) fillets with emphasis on EPA and DHA contents. Journal of Food Composition and Analysis, 94, Art. No.: 103618. https://doi.org/10.1016/j.jfca.2020.103618 © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

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