Consulta: creatorFacets:"Mariani, Stefano"
Registros recuperados: 5
Data/hora: 06/06/2024 13:38:24

Environmental DNA reveals tropical shark diversity in contrasting levels of anthropogenic impact
Provedor de dados: 5
Autores: Bakker, Judith; Wangensteen, Owen S.; Chapman, Demian D.; Boussarie, Germain; Buddo, Dayne; Guttridge, Tristan L.; Hertler, Heidi; Mouillot, David; Vigliola, Laurent; Mariani, Stefano.
Sharks are charismatic predators that play a key role in most marine food webs. Their demonstrated vulnerability to exploitation has recently turned them into flagship species in ocean conservation. Yet, the assessment and monitoring of the distribution and abundance of such mobile species in marine environments remain challenging, often invasive and resource-intensive. Here we pilot a novel, rapid and non-invasive environmental DNA (eDNA) metabarcoding approach specifically targeted to infer shark presence, diversity and eDNA read abundance in tropical habitats. We identified at least 21 shark species, from both Caribbean and Pacific Coral Sea water samples, whose geographical patterns of diversity and read abundance coincide with geographical differences...
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00416/52732/74686.pdf

Environmental DNA illuminates the dark diversity of sharks
Provedor de dados: 5
Autores: Boussarie, Germain; Bakker, Judith; Wangensteen, Owen S.; Mariani, Stefano; Bonnin, Lucas; Juhel, Jean-baptiste; Kiszka, Jeremy J.; Kulbicki, Michel; Manel, Stephanie; Robbins, William D.; Vigliola, Laurent; Mouillot, David.
In the era of "Anthropocene defaunation," large species are often no longer detected in habitats where they formerly occurred. However, it is unclear whether this apparent missing, or "dark," diversity of megafauna results from local species extirpations or from failure to detect elusive remaining individuals. We find that despite two orders of magnitude less sampling effort, environmental DNA (eDNA) detects 44% more shark species than traditional underwater visual censuses and baited videos across the New Caledonian archipelago (south-western Pacific). Furthermore, eDNA analysis reveals the presence of previously unobserved shark species in human-impacted areas. Overall, our results highlight a greater prevalence of sharks than described by traditional...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00442/55321/56837.pdf

Current Methods for Seafood Authenticity Testing in Europe: is there a Need for Harmonisation?
Provedor de dados: 5
Autores: Griffiths, Andrew M.; Sotelo, Carmen G.; Mendes, Rogerio; Perez-martin, Ricardo I.; Schroeder, Ute; Shorten, Marc; Silva, Helena A.; Verrez-bagnis, Veronique; Mariani, Stefano.
Mislabelling of food products has recently received a great deal of public scrutiny, but it remains unclear exactly what methods are being utilised in laboratories testing the authenticity of foods. In order to gain insight into the specific area of the analysis of seafood, a questionnaire focusing on the taxonomic groups typically analysed and the techniques utilised was sent to over one hundred accredited laboratories across the UK, Ireland, Spain, Portugal, France and Germany. Forty-five responded positively, demonstrating significant differences in both the species analysed and methods utilised among the countries included in the survey. Indeed, a diversity of methods was employed across laboratories and efforts to harmonise and/or standardise testing...
Tipo: Text
Palavras-chave: Food testing; Forensically informative nucleotide sequencing; Species identification; DNA barcoding; Fisheries.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00188/29918/28383.pdf

Tuna labels matter in Europe: Mislabelling rates in different tuna products
Provedor de dados: 5
Autores: Sotelo, Carmen G.; Velasco, Amaya; Perez-martin, Ricardo, I; Kappel, Kristina; Schroeder, Ute; Verrez-bagnis, Veronique; Jerome, Marc; Mendes, Rogerio; Silva, Helena; Mariani, Stefano; Griffiths, Andrew.
Tuna fisheries and processing represent economic activities of paramount importance around the world. Most of these products are traded for human consumption and in general are highly demanded commodities. However, not all tuna products achieve the same market price, some consumers are willing to pay a huge amount of money for certain species (i.e. Japanese market for Bluefin tuna) while other species are rather affordable (i.e. Skipjack tuna), therefore mislabelling has been observed frequently. We collected and analysed 545 tuna samples in six European countries, including fresh, frozen and canned products, and we have investigated whether or not these products were correctly labelled under European and national legislations. We found an overall...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55137/56604.pdf

Low mislabeling rates indicate marked improvements in European seafood market operations
Provedor de dados: 5
Autores: Mariani, Stefano; Griffiths, Andrew M.; Velasco, Amaya; Kappel, Kristina; Jerome, Marc; Perez-martin, Ricardo I.; Schroeder, Ute; Verrez-bagnis, Veronique; Silva, Helena; Vandamme, Sara G.; Boufana, Belgees; Mendes, Rogerio; Shorten, Marc; Smith, Cat; Hankard, Elizabeth; Hook, Samantha A.; Weymer, Alice S.; Gunning, Daryl; Sotelo, Carmen G.
Over the span of a decade, genetic identification methods have progressively exposed the inadequacies of the seafood supply chain, revealing previously unrecognized levels of seafood fraud, raising awareness among the public, and serving as a warning to industry that malpractice will be detected. Here we present the outcome of the latest and largest multi-species, transnational survey of fish labeling accuracy to date, which demonstrates an apparent sudden reduction of seafood mislabeling in Europe. We argue that recent efforts in legislation, governance, and outreach have had a positive impact on industry regulation. Coordinated, technology-based, policy-oriented actions can play a pivotal role in shaping a transparent, sustainable global seafood market...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00302/41323/40517.pdf