DNA barcoding reveals mislabeling and commercial fraud in the marketing of fillets of the genus Brachyplatystoma Bleeker, 1862, the Amazonian freshwater catfishes economically important in Brazil.

ABSTRACT: The substitution and mislabeling is facilitated by the processing of fish products. We employed a DNA barcoding to authenticate fillets labeled as "dourada" (Brachyplatystoma rousseauxii), and "piramutaba" (Brachyplatystoma vaillantii) marketed in the Brazil. A 615 bp of the Cytochrome oxidase subunit I (COI) was sequenced from 305 fillets and subsequently identified to species level by querying public databases and sequences of reference species. The results revealed a global mean substitution rate of 17%. The highest substitution rate was detected in "dourada" (26%), the most valuable species, followed by "piramutaba" (9%). The most cases of substitutions were by species of lower commercial value, suggesting fraud aimed at increased profits. Therefore, we suggest the improv

SUBMITTER: de Carvalho SC 

PROVIDER: S-EPMC7495058 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature