Detection of mislabelled seafood products in Malaysia by DNA barcoding: Improving transparency in food market

Chin, Too Chin; Adibah, A.B.; Hariz, Z A Danial; Azizah, Mohd Nor Siti

doi:10.1016/j.foodcont.2015.11.042

Cited by 81 publications

(18 citation statements)

References 51 publications

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“…Investigations in Asia using DNA barcoding have also reported incidences of mislabelling of fish. In a pioneering forensic fish survey conducted in Malaysia in 2016, 16 percent of raw, frozen or commercially processed fish were found to be mislabelled (Chin Chin et al, 2016). Studies in China using DNA barcoding have also revealed widespread mislabelling of fish on the national market (Xiong et al, 2016a(Xiong et al, , 2016c.…”

Section: Scale and Global Incidence Of Fish Fraudmentioning

confidence: 99%

Discrimination between freshwater and marine fish using fatty acids: ecological implications and future perspectives

et al. 2020

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Fatty acids (FA) are a major source of nutrients and energy in aquatic food webs, as well as serving as the main components of all cell membranes. Increasing anthropogenic impacts (e.g., climate change) are predicted to selectively alter the production of these critical compounds, with potential cascading effects reaching higher trophic level organisms, including humans. In order to provide a more comprehensive assessment of these potential effects, we synthesized and systematically explored differences in the abundance and distribution of FA in fish, due to their pivotal role in aquatic ecosystems and value to humans. An extensive data set consisting of 1,382 fish FA profiles was analyzed to identify the main differences in FA composition of freshwater vs marine fish, taking into account effects of taxonomic, geographic (i.e., latitude zone), and functional (i.e., feeding mode) factors. Freshwater fish had relatively high contents of 18:2n-6 (linoleic acid, LNA) and 20:4n-6 (arachidonic acid, ARA) indicative of freshwater algae and terrestrial dietary sources. In contrast, 20:1n-9 and 22:1n-11, well known as marine zooplankton biomarkers, typified the FA composition of marine fish. Using this result, we constructed a new metric (i.e., a specific C18 – C22 unsaturated FA ratio) that we propose can assist in characterizing the feeding habitat (freshwater vs marine) and, to some extent, diet of fish. Our analysis also revealed that carnivores from high latitudes had higher contents of 20:5n-3 (eicosapentaenoic acid, EPA) and 22:6n-3 (docosahexaenoic acid, DHA), thus making them an excellent source of essential FA for human consumption. In parallel, unsaturated FA contents were higher overall at temperate and polar latitudes than in the tropics. The latter two trends may be driven by water temperature variation across latitudes, which is known to affect FA composition of cell membranes in ectotherms. Last, a strong retention of DHA, as a function of feeding mode, was observed in both freshwater and marine fish. We conclude that our discrimination between freshwater and marine fish provides a quantitative tool that is applicable to a broad range of research and conservation initiatives.

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Section: Scale and Global Incidence Of Fish Fraudmentioning

confidence: 99%

Discrimination between freshwater and marine fish using fatty acids: ecological implications and future perspectives

et al. 2020

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“…The accurate identification of fish species is a pivotal component to protect the extant ichthyofaunal biodiversity and to perform regular assessments of local fish faunas for conservation planning (Ahmed et al, 2019). Currently, partial cytochrome c oxidase subunit I (COI) sequences (DNA barcodes) are applied extensively as a complement to the traditional morpho-taxonomy for standardized and regular species identification (Chin et al, 2016;Filonzi et al, 2010;Hebert et al 2003;Shehata et al, 2019). The marked divergence and lack of overlap between intraspecific and interspecific genetic distances is the primary reason for the selection of COI as the standard barcode gene (Hebert et al, 2003).…”

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confidence: 99%

Molecular characterization of marine and coastal fishes of Bangladesh through DNA barcodes

Ahmed

Datta

Saha

et al. 2021

Ecology and Evolution

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Bangladesh has vast coastal and marine resources along its south edge as the Bay of Bengal is situated in the south of Bangladesh.There are a total of 166,000 square km water areas including the Exclusive Economic Zone (EEZ) which is larger than the country's total land area of 147,500 square km. The country is rich not only in terms of its vast water areas but also in terms of biological diversity.The marine fisheries sector plays an important role in the economy of Bangladesh in terms of nutrition, income, employment, and foreign exchange earnings (DoF, 2018). Fish provides about 60% of animal protein in the daily dietary requirement of 160 million people of the country. Marine fisheries alone contribute 654,687 metric tons which is 15.31% of the country's total fish production (DoF, 2018).Nonetheless, description and information of marine fishes of Bangladesh are scattered throughout a wide range of scientific

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“…Previous studies revealed high levels of seafood substitutions in the Americas (e.g., Carvalho et al 2011Carvalho et al , 2015Hanner et al 2011;Willette et al 2017), Europe (Harris et al 2016;Miller et al 2012;Pappalardo and Ferrito 2015), Asia (Chang et al 2016;Nagalakshmi et al 2016;Xiong et al 2016;Chin et al 2016), and elsewhere. In the few studies in the Middle East and North Africa (e.g., Galal-Khallaf et al 2014), the substitution may be as high as 84% in highly processed seafood (Keskin and Atar 2012).…”

Section: Discussionmentioning

confidence: 99%

DNA barcoding of fish species reveals low rate of package mislabeling in Qatar

Chen

Zakaria

Altarawneh

et al. 2019

Genome

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DNA barcoding technique has made it possible to authenticate various species used for food and medicinal purposes. In the identification of seafood species, studies are concentrated in North America, Europe, and Asia. Elsewhere, including countries in the Middle East and North Africa, studies of this sort are scarce. This study focuses on packaged fresh or minimally processed fish fillet available at eight major supermarket chains in Qatar. A cocktail of eight primers attached with M13 tails established for fish species identification was adopted to facilitate PCR and sequencing. Sequences were compared with those available in the Barcode of Life Databases (BOLD Systems) and BLAST in NCBI databases. Among the 62 unique fish packages with resolved sequences, only three are confirmed to be mislabeled, at a rate of about 5%. Two of the substituted species are high value items while the third species was replaced by another, equally low-cost species. The relatively low rate of mislabeling in the samples is perhaps a result of strict local food safety regulations, which may have led to high consistency between the package labels and their contents.

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Detection of mislabelled seafood products in Malaysia by DNA barcoding: Improving transparency in food market

Cited by 81 publications

References 51 publications

Discrimination between freshwater and marine fish using fatty acids: ecological implications and future perspectives

Discrimination between freshwater and marine fish using fatty acids: ecological implications and future perspectives

Molecular characterization of marine and coastal fishes of Bangladesh through DNA barcodes

DNA barcoding of fish species reveals low rate of package mislabeling in Qatar

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