Prospective molecular markers for the identification of illegally traded angelsharks (Squatina) and dolphin (Sotalia guianensis)

Falcão, Luara Hanna Oliveira; Furtado-Neto, M.A.A.; Maggioni, Rodrigo; Faria, Vicente Vieira

doi:10.4238/2014.november.24.2

Cited by 6 publications

(5 citation statements)

References 11 publications

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“…However, its taxonomic status remains controversial (Solé-Cava et al, 1983;Solé-Cava and Levy, 1987;Vooren and da Silva, 1992;Soto, 2001). Based on the IUCN Red List, the species appears as a synonym of S. punctata, which is classified as "Endangered" (Musick and Kyne, 2007), even though genetic analysis has validated the species (Furtado-Neto and Carr, 2002;Stelbrink et al, 2010;Falcão et al, 2014). In our phylogenetic tree, S. occulta appears as a distinct species and sister group of S. guggenheim in concordance with Stelbrink et al (2010).…”

Section: Discussionmentioning

confidence: 77%

The fishing and illegal trade of the angelshark: DNA barcoding against misleading identifications

et al. 2018

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Morphological identification in the field can be extremely difficult considering fragmentation of species for trade or high similarity between congeneric species. In this context, the shark group belonging to the genus Squatina is composed of three species distributed in the southern part of the western Atlantic. These three species are classified in the IUCN Red List as endangered, and they are currently protected under Brazilian law, which prohibits fishing and trade. Molecular genetic tools are now used for practical taxonomic identification, particularly in cases where morphological observation is prevented, e.g., during fish processing. Consequently, DNA barcoding was used in the present study to track potential crimes against the landing and trade of endangered species along the São Paulo coastline, in particular Squatina guggenheim (n = 75) and S. occulta (n = 5), as well as the Brazilian guitarfish Pseudobatos horkelii (n = 5). DNA barcoding revealed the continuous fishing and trafficking of these protected species, thus giving clear evidence that the current conservation models and methods of monitoring are not working.

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Section: Discussionmentioning

confidence: 77%

The fishing and illegal trade of the angelshark: DNA barcoding against misleading identifications

et al. 2018

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“…KJ879244) and another from the Amazon (S. fluviatilis, GenBank accession No. KJ879249) (Falcão et al, 2014). Finally, the sequences of T. truncatus and Steno bredanensis were included as outgroups for the analysis.…”

Section: Preparation For Percent Identity Analysis: Checking the Identity Of Sotalia Guianensis Complete Mitochondrial Sequences Availablmentioning

confidence: 99%

Molecular identification of cetaceans from the West Atlantic using the E3-I5 region of COI

Falcão¹,

Campos

Freitas

et al. 2017

Genet. Mol. Res.

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Molecular identification is very useful in cases where morphology-based species identification is not possible. Examples for its application in cetaceans include the identification of carcasses of stranded animals in advanced state of decomposition and body parts that are illegally traded. One DNA region that is often used for molecular identification is the Folmer region of the mitochondrial gene cytochrome c oxidase subunit I (COI) (locus 48 to 705 bp). This locus has been used for the identification of several animal species, including whales and dolphins. The goal of the present study was to evaluate the usefulness of another region of COI, the E3-I5 (locus 685 to locus 1179; 495 bp) as a marker for identification of cetaceans from northeastern Canada and northeastern Brazil. The identification markers were successfully obtained for seven cetacean species after performing percent identity and Basic Local Alignment Search Tool analyses. The obtained markers are now publicly available and are useful for the identification of the endangered blue whale (Balaenoptera musculus), common minke whale (B. acutorostrata), vulnerable sperm whale (Physeter macrocephalus), harbor porpoise (Phocoena phocoena), common bottlenose dolphin (Tursiops truncatus), Guiana dolphin (Sotalia guianensis), and melon-headed whale (Peponocephala electra).

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“…Recently, the taxonomy of these species was revised and clarified and, Squatina guggenheim Marini 1936, S. argentina (Marini 1930) and S. occulta Vooren & da Silva 1991 are recognized as valid species in this area (Vaz & de Carvalho 2013). Genetic analysis supports the differentiation of these three species (Solé-Cava & Levy 1987;Solé-Cava et al 1983;Furtado-Neto et al 2002;Falcão et al 2014).…”

Section: Introductionmentioning

confidence: 99%

The southernmost range limit for the hidden angelshark Squatina occulta

et al. 2016

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Background: Angelsharks (Genus Squatina) are distributed in the southern Southwest Atlantic Ocean between southeastern Brazil and central Patagonia. The endangered hidden angelshark Squatina occulta is reported in the literature as ranging from Espírito Santo, Brazil to Southern Uruguay. Its presence in Argentine waters has been suspected but not verified so far. This study describes and analyzes a specimen of S. occulta found in Puerto Quequén 38°40′S -58°50′W, Buenos Aires Province, Argentina. Results: An immature male of 578 mm total length and 1,450 g was collected from commercial landings of the bottom trawl fishery of Puerto Quequén. The specimen exhibited the coloration pattern, dermal denticle distribution, and tooth formula characteristic of S. occulta. Conclusions: Squatina guggenheim and S. argentina are already known to occur off Puerto Quequén. The present finding confirms the presence of a third species of angelshark in Argentina and constitutes the southernmost record of S. occulta.

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Prospective molecular markers for the identification of illegally traded angelsharks (Squatina) and dolphin (Sotalia guianensis)

Cited by 6 publications

References 11 publications

The fishing and illegal trade of the angelshark: DNA barcoding against misleading identifications

The fishing and illegal trade of the angelshark: DNA barcoding against misleading identifications

Molecular identification of cetaceans from the West Atlantic using the E3-I5 region of COI

The southernmost range limit for the hidden angelshark Squatina occulta

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