Molecular differentiation of the species of two squid families (Loliginidae and Ommastrephidae) based on a PCR study of the 5S rDNA gene

Sales, João Bráullio de Luna; Rodrigues‐Filho, Luis Fernando da Silva; Haimovici, Manuel; Sampaio, Iracilda; Schneider, Horácio

doi:10.1016/j.foodcont.2010.06.011

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…The squid fauna proposed for these regions is very similar to that reported for some regions of the North Coast of Brazil (Jereb and Roper, 2010). The presence of D. pleii , L. brevis and D. pealeii in these locations are in accordance with what has been proposed by recent molecular reviews with specimens from the North Coast of Brazil (Sales et al 2011; 2013; 2014; 2017; 2024a; Costa et al 2021). Two species of Doryteuthis identified in the present study are of high commercial importance in Brazil and in North America (Herke and Foltz 2002; Jereb and Roper 2010; Postuma and Gasalla 2015), and, it is important to clarify that the lineage of D. pleii commercialized in Brazil corresponds to the actual species (Sales et al 2017), while the lineage exploited in North America corresponds to a not yet described species.…”

Section: Discussionsupporting

confidence: 92%

“…And when it comes to commercial value, members of the family Ommastrephidae represent the largest volume of commercialization and global importance (FAO 2016). Loliginids represent the second family of interest for global captures due to their distribution limited to the continental shelf, in tropical and temperate regions around the world, as well as the high quality of the species' meat (Jereb and Roper 2010;Sales et al 2011), having a high protein value, a wide variety of essential amino acids and extremely low fat levels, making regular consumption of the species part of healthy and balanced diets (Anfaco-Cecopesca 2018; USDA 2018).…”

Section: Introductionmentioning

confidence: 99%

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Molecular identification of whole squids and calamari at fairs and markets in regions of Latin America

Paiva,

Souza Rodrigues,

de Freitas Almeida

et al. 2024

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In recent decades, the commercial importance of cephalopods has increased considerably, being an important fishing resource around the world. However, during the preparation for commercialization of those species, especially those sold in markets, they suffer the process known as calamari which includes removing and separating the head, arm, skin or even having the body structure cut into rings, which ends up making it difficult or often prevents the identification of the species, which can lead to replacements. In this sense, the present study aimed to use the large ribosomal region, rrnL (also known as 16S rDNA) to genetically identify cephalopod species sold in markets and fairs in Latin America. Whole and processed samples were collected from supermarkets and directly from local fishers the approximate collection location. Each generated sequence was submitted to the website Genbank for molecular comparison and included in the database for subsequent genetic identification. Comparison of sequences using the Blastn revealed the presence of eight species that are widely traded in the Latin American region. Our results indicate labeling errors in samples from the State of Para that contained the species Dosidicus gigas (d Orbigny, 1823) found only in the Pacific Ocean and were generically labeled as National Lula. No type of substitution was found among the samples that were being sold at fairs and markets, only labeling errors. Thus, our results demonstrate the effectiveness of the rrnL for identifying species and evaluating labeling errors.

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