Molecular analyses of confiscated shark fins reveal shortcomings of CITES implementations in Germany

Villate-Moreno, Melany; Pollerspöck, Jürgen; Kremer‐Obrock, Friederike; Straube, Nicolas

doi:10.1111/csp2.398

Cited by 8 publications

(12 citation statements)

References 25 publications

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“…Various proportion of all threatened categories Fig. 2 Proportion of conservation status (IUCN status) from each sample sites step to enhance species identification accuracy (Van Houtan et al 2020;Villate-Moreno et al 2021). This approach is also more convenient for the trade monitoring staffs since it does not require extensive training in taxonomy, which is especially in shortage in Thailand and DNA based approach can be performed by outsources.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the majority Vulnerable and Endangered species identified from shark fin product indicated that we need more law enforcement and trade monitoring for those threatened species before their populations decline even further. Species identification using external morphological examination can be a first step to identify CITES-listed species or regulated species (Marshall and Barone 2016 ), however, missing key diagnostic characteristics of processed fin or even in dried fins remains problematic (Ferrette et al 2019 ; Villate-Moreno et al 2021 ), therefore we recommend DNA-based identification methods to detect threatened species and CITES-listed species in shark fin trade. A standard molecular diagnostic technique is another step to enhance species identification accuracy (Van Houtan et al 2020 ; Villate‐Moreno et al 2021).…”

Section: Discussionmentioning

confidence: 99%

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DNA-based species identification of shark fins traded in thai markets

Klangnurak

Arunrugstichai²,

Manopawitr³

et al. 2023

Conserv Genet

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Shark fins are among the most highly prized seafood products in the world with massive consumption in Asia over the past several decades. The demand for shark fins is a major driver of the enormous population declines of elasmobranchs that are generally vulnerable to overexploitation. This study aims to better understand the species composition of shark fin products in Thailand and their conservation statuses by using DNA-based species identification. Various types and sizes of shark fins were collected from 4 locations in Thailand. DNA barcoding method based on a fragment of the cytochrome c oxidase subunit I (COI) gene was applied to species identification. Fins from at least 15 shark species were found from Thailand’s markets. The spottail shark (Carcharhinus sorrah ) and the night shark (Carcharhinus signatus ) were the two dominant species presented in this study. 34% of identifiable samples are the species that have not been record in this region. 62% of species detected from the fin samples are categorized under the threatened categories of IUCN Red List. Species composition reported in shark fin products potentially helps indicate the appropriate conservation action and increases awareness from monitoring the trade in elasmobranch products. Supplementary Information The online version contains supplementary material available at 10.1007/s10592-023-01519-0.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

DNA-based species identification of shark fins traded in thai markets

Klangnurak

Arunrugstichai²,

Manopawitr³

et al. 2023

Conserv Genet

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“…The Scalloped Hammerhead ( S. lewini ) was the second most commonly captured shark documented here. They are heavily fished worldwide either targeted or as bycatch and highly prized and traded in the global fin trade ( Villate-Moreno et al, 2021 ; Pinhal et al, 2020 ). As a result, severe population declines have occurred in different regions of the world and therefore S. lewini was evaluated as Critically Endangered in the most recent ( Rigby et al., 2019 ) assessment and is listed under the Appendix II of CITES.…”

Section: Discussionmentioning

confidence: 99%

“…50–60 miles). It is precisely due to their pelagic habits and distribution that silky sharks are directly affected by target or bycatch fisheries in open waters and their populations have severely declined during the last decades, contributing as well in great proportion to the global fin trade ( Clarke et al, 2015 ; Sánchez-de Ita et al, 2010 ; Villate-Moreno et al, 2021 ). In addition, here we report artisanal fisheries catching juveniles in coastal areas, which increases the fishing pressure on this species in the ETP.…”

Section: Discussionmentioning

confidence: 99%

Molecular identification and first demographic insights of sharks based on artisanal fisheries bycatch in the Pacific Coast of Colombia: implications for conservation

Villate-Moreno

Cubillos-M

Stibor

et al. 2022

PeerJ

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The Pacific coast of Colombia is characterized by mangrove ecosystems which play a crucial role as possible nurseries for juvenile sharks. However, trophic food webs from coastal ecosystems are heavily disturbed by increased fishing pressure, which affects numerous shark species. In this region of the Eastern Tropical Pacific (ETP), fisheries’ data from coastal areas are scarce and unspecific, as most sharks from artisanal fisheries are landed decapitated and finless, making their morphological identification difficult. For the establishment and implementation of effective regional conservation and management policies, information on the diversity and population dynamics of shark species is crucial. We therefore sequenced the mitochondrial NADH2 gene of 696 samples taken from fishermen’s landings of shark’s bycatch along the Colombian north Pacific coast. We were able to identify 14 species of sharks, two of the most abundant species were Sphyrna lewini and Carcharhinus falciformis, both evaluated on IUCN the Red List of Threatened species (Critically Endangered and Vulnerable) and CITES regulated. We found low genetic diversity in the sampled area increasing the concern for both species in the region, even more considering that the majority of individuals were juveniles. Our results showed the importance of genetic markers for first population genetic insights as a complementary tool during the decision-making process in management plans. For this specific region, strategies such as the delimitation of conservation priority areas or the regulation of fishing gears could help improve the sustainability of shark populations in the Colombian Pacific.

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“…This is despite our primary result that shark conservation should prioritize areas within the Exclusive Economic Zones (EEZs); a conclusion supported by independent biogeographic analyses [3,4], reconstructed global fishing effort and catch [5,6], and syntheses of biotelemetry data [7]. Our analysis also responds to calls for new approaches [8,9], as official fin trade statistics have established flaws [10] that miss what remains illegal or unreported. The main criticism of Raoult et al is that our SDMs make unrealistic assumptions about fishing and that our SDMs disagree with published expert range maps (‘ERMs’, e.g.…”

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confidence: 86%