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DNA Barcodes

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Cods for sale Do we know what we are buying?

Christian Lambarri
  • Colección Nacional de Peces, Instituto de Biología, Universidad Nacional Autónoma de México. Distrito Federal. 04510. México
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/ Héctor Espinosa
  • Corresponding author
  • Colección Nacional de Peces, Instituto de Biología, Universidad Nacional Autónoma de México. Distrito Federal. 04510. México
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/ Armando Martínez
  • Colección Nacional de Peces, Instituto de Biología, Universidad Nacional Autónoma de México. Distrito Federal. 04510. México
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/ Ariana Hernández
  • Colección Nacional de Peces, Instituto de Biología, Universidad Nacional Autónoma de México. Distrito Federal. 04510. México
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Published Online: 2015-11-26 | DOI: https://doi.org/10.1515/dna-2015-0004

Abstract

The Atlantic Cod Gadus morhua is fished in Northern Atlantic and Arctic waters. In Mexico cod is imported from Norway and the United States, and is traditionally eaten at Christmas and Easter. In Mexico City several stores sell dry-salted cod, but due to the high price of the imported Atlantic Cod, other fish species are sold. In this project we examined six samples of dried-salted fish from different stores and used DNA barcoding of the COI gene to corroborate the identity of the product sold as Atlantic Cod. Barcoding revealed that only two of the six samples (33%) were Atlantic cod, with two being Ling, one Alaska Pollock, and one Blue Shark. The high rate of mislabeling (67%) is a major concern. It is especially worrying that Blue Shark is being sold as Atlantic cod, since the Blue Shark is listed as a near-threatened species by the IUCN. We must be aware of the damages that overexploitation and uninformed consumption cause to cod and shark populations. There needs to be stricter policing of seafood product labeling in México.

Keywords: Barcode; Atlantic Cod; food; shark; DNA; COI; conservation

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About the article

Received: 2014-11-14

Accepted: 2015-06-08

Published Online: 2015-11-26

Published in Print: 2015-01-01


Citation Information: DNA Barcodes, ISSN (Online) 2299-1077, DOI: https://doi.org/10.1515/dna-2015-0004.

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© 2015. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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