Published 2021

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Publication details

Journal : Applied Food Research , vol. 2 , p. 1–8–31 , 2021

Publisher : Elsevier

International Standard Numbers :
Printed : 2772-5022
Electronic : 2772-5022

Publication type : Academic article

Contributors : Esaiassen, Margrethe; Jensen, Tonje Kristin; Edvinsen, Guro Kristine; Otnæs, Carina H.A.; Ageeva, Tatiana N; Mæhre, Hanne K

Issue : 1

Research areas

Farmed fish

Quality and measurement methods

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Salmon feeds have changed over the years, leading to changed biochemical composition of the fish. The main aim of this study was to compare biochemical compositions and storage stability of commercially produced organic and conventional salmon. Organically (n = 40) and conventionally farmed salmon (n = 39) were sampled. The fish were anesthetized, killed by gill cutting and bled before filleting. Fish samples were subjected to proximate analysis, fatty acid and amino acid composition, along with colour and TBARS analyses. The lipid content of organically and conventionally farmed salmon was 13% and 17 %, respectively. Organic fish contained approximately 48 % more EPA and DHA than did the conventional fish, 17.2 g kg−1 vs. 11.6 g kg−1, respectively. The organic salmon had lower colour saturation than the conventional, and TBARS were higher in the organic than in the conventional salmon. To conclude, the main differences between fresh organic and conventional salmon were related to lipid content and fatty acid composition. The high energy level in both groups should be considered when making dietary recommendations. Organic salmon is less stable due to its high content of long-chained unsaturated fatty acids, and appears similar to conventionally farmed salmon some years ago.


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