Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market

Fish of the tribe Thunnini represent a significant proportion of the stock caught by the fishing industry, with many of these fishes being collectively called tuna. However, only certain species can be used legally as an ingredient in canned tuna products, depending on regional food regulations. In...

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Autores principales:	Chia-Hao Chang, Yueh-Tzu Kao, Ting-Ting Huang, Yu-Chun Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Thunnini substitution mislabeling rate one species-one name adulteration Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/85d3ce4a450246ef8908cb5083ae646d
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spelling	oai:doaj.org-article:85d3ce4a450246ef8908cb5083ae646d2021-11-25T17:33:53ZProduct Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market10.3390/foods101126552304-8158https://doaj.org/article/85d3ce4a450246ef8908cb5083ae646d2021-11-01T00:00:00Zhttps://www.mdpi.com/2304-8158/10/11/2655https://doaj.org/toc/2304-8158Fish of the tribe Thunnini represent a significant proportion of the stock caught by the fishing industry, with many of these fishes being collectively called tuna. However, only certain species can be used legally as an ingredient in canned tuna products, depending on regional food regulations. In Taiwan, only <i>Thunnus</i> species or <i>Katsuwonus pelamis</i> can be used as canned tuna. Here, we authenticated 90 canned tuna products, including 25 cat food samples, by sequencing two mitochondrial regions, 16S rRNA (16S) and the control region (CR). BLAST analysis revealed that <i>Sarda orientalis</i>, <i>Euthynnus affinis</i>, <i>Auxis rochei</i>, and <i>Auxis thazard</i> are all used as substitutes for legitimate tuna products. We found that 63.33% of investigated samples are true canned tuna, i.e., contain <i>Thunnus</i> species or skipjack tuna. We advocate that the Taiwanese government publishes an official standardized list of fishes, especially so that scientific, Chinese and vernacular names can be assigned unambiguously based on a “one species-one name policy”, thereby clarifying which species can be used in seafood products such as tuna. Furthermore, we feel that the large-scale and long-term monitoring of canned tuna products is warranted to fully assess the extent of tuna product adulteration in Taiwan.Chia-Hao ChangYueh-Tzu KaoTing-Ting HuangYu-Chun WangMDPI AGarticleThunninisubstitutionmislabeling rateone species-one nameadulterationChemical technologyTP1-1185ENFoods, Vol 10, Iss 2655, p 2655 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Thunnini substitution mislabeling rate one species-one name adulteration Chemical technology TP1-1185
spellingShingle	Thunnini substitution mislabeling rate one species-one name adulteration Chemical technology TP1-1185 Chia-Hao Chang Yueh-Tzu Kao Ting-Ting Huang Yu-Chun Wang Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
description	Fish of the tribe Thunnini represent a significant proportion of the stock caught by the fishing industry, with many of these fishes being collectively called tuna. However, only certain species can be used legally as an ingredient in canned tuna products, depending on regional food regulations. In Taiwan, only <i>Thunnus</i> species or <i>Katsuwonus pelamis</i> can be used as canned tuna. Here, we authenticated 90 canned tuna products, including 25 cat food samples, by sequencing two mitochondrial regions, 16S rRNA (16S) and the control region (CR). BLAST analysis revealed that <i>Sarda orientalis</i>, <i>Euthynnus affinis</i>, <i>Auxis rochei</i>, and <i>Auxis thazard</i> are all used as substitutes for legitimate tuna products. We found that 63.33% of investigated samples are true canned tuna, i.e., contain <i>Thunnus</i> species or skipjack tuna. We advocate that the Taiwanese government publishes an official standardized list of fishes, especially so that scientific, Chinese and vernacular names can be assigned unambiguously based on a “one species-one name policy”, thereby clarifying which species can be used in seafood products such as tuna. Furthermore, we feel that the large-scale and long-term monitoring of canned tuna products is warranted to fully assess the extent of tuna product adulteration in Taiwan.
format	article
author	Chia-Hao Chang Yueh-Tzu Kao Ting-Ting Huang Yu-Chun Wang
author_facet	Chia-Hao Chang Yueh-Tzu Kao Ting-Ting Huang Yu-Chun Wang
author_sort	Chia-Hao Chang
title	Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
title_short	Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
title_full	Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
title_fullStr	Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
title_full_unstemmed	Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market
title_sort	product authentication using two mitochondrial markers reveals inconsistent labeling and substitution of canned tuna products in the taiwanese market
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/85d3ce4a450246ef8908cb5083ae646d
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Product Authentication Using Two Mitochondrial Markers Reveals Inconsistent Labeling and Substitution of Canned Tuna Products in the Taiwanese Market

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