Title

Marketplace Substitution of Atlantic Salmon for Pacific Salmon in Washington State Detected by DNA Barcoding

Publication Date

1-1-2012

Document Type

Article

Abstract

Accurate identification of seafood in the marketplace is an issue of international concern, due to high rates of market substitution of cheaper or more widely available species for expensive or high-demand species. Salmon samples from stores and restaurants throughout western Washington, USA were tested using DNA sequencing of a short section of the mitochondrial cytochrome c oxidase I (COI) gene (DNA barcoding) to identify Atlantic salmon substituted for Pacific salmon. Of 99 salmon samples, 11 (11%) were Atlantic salmon sold as Pacific salmon. More than 38% of restaurant samples were mislabeled to species, while only 7% of store samples were mislabeled. Market substitution rates were significantly greater in restaurants compared to stores, and consistently greater in winter compared to spring, although not significantly. The high market substitution rate in restaurants documents a pressing need for more monitoring and enforcement specifically in restaurants. DNA barcoding is a valuable tool for rapid and definitive authentication of salmon in the marketplace, and should be more widely adopted to discourage market substitution. (C) 2011 Elsevier Ltd. All rights reserved.

Publication Title

Food Research International

Volume

45

Issue

1

First Page

388

Last Page

393

DOI

10.1016/j.foodres.2011.10.043

Version

pre-print, post-print

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