A high-quality genetic reference database for European commercial fishes reveals substitution fraud of processed Atlantic cod (Gadus morhua) and common sole (Solea solea) at different steps in the Belgian supply chain
Creators
- 1. Flanders Research Institute for Agriculture, Fisheries and Food, ILVO, Aquatic Environment and Quality
- 2. Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven
- 3. Department of Meat Science, Faculty of Food Science and Fisheries, West Pomeranian University of Technology Szczecin
- 4. LAQV-REQUIMTE, Faculty of Pharmacy, University of Porto
- 1. Flanders Research Institute for Agriculture, Fisheries and Food, ILVO, Aquatic Environment and Quality
Description
Seafood is an important component of the human diet. With depleting fish stocks and increasing prices, seafood is prone to fraudulent substitution. DNA barcoding has illustrated fraudulent substitution of fishes in retail and restaurants. Whether substitution also occurs in other steps of the supply chain remains largely unknown. DNA barcoding relies on public reference databases for species identification, but these can contain incorrect identifications. The creation of a high quality genetic reference database for 42 European commercially important fishes was initiated containing 145 Cytochrome c oxidase subunit I (COI) and 152 Cytochrome b (cytB) sequences. This database was used to identify substitution rates of Atlantic cod (Gadus morhua) and common sole (Solea solea) along the fish supply chain in Belgium using DNA barcoding. Three out of 132 cod samples were substituted, in catering (6 %), import (5%) and fishmongers (3%). Seven out of the 41 processed sole samples were substituted, in wholesale (100%), food services (50%), retailers (20%) and catering (8%). Results show that substitution of G. morhua and S. solea is not restricted to restaurants, but occurs in other parts of the supply chain, warranting for more stringent controls along the supply chain to increase transparency and trust among consumers.
Files
Deconinck et al. 2020 AM.pdf
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Additional details
Related works
- Is identical to
- Journal article: 10.1016/j.fct.2020.111417 (DOI)