{"id":13632,"date":"2019-08-29T08:46:21","date_gmt":"2019-08-29T06:46:21","guid":{"rendered":"https:\/\/www.azti.es\/azti-desarrolla-un-metodo-genetico-para-identificar-el-origen-de-los-atunes-rojos-mejorar-su-gestion-y-contribuir-a-su-conservacion\/"},"modified":"2021-06-18T11:41:21","modified_gmt":"2021-06-18T09:41:21","slug":"azti-has-developed-a-genetic-method-to-identify-the-origin-of-bluefin-tuna-specimens-to-improve-the-management-and-promoting-the-conservation-of-the-species","status":"publish","type":"post","link":"https:\/\/old.azti.es\/en\/azti-has-developed-a-genetic-method-to-identify-the-origin-of-bluefin-tuna-specimens-to-improve-the-management-and-promoting-the-conservation-of-the-species\/","title":{"rendered":"AZTI has developed a genetic method to identify the origin of bluefin tuna specimens, to improve the management and promoting the conservation of the species"},"content":{"rendered":"\n<ul><li>The technology centre has coordinated this\nresearch that enables the development of a pioneering tool to discover the\norigin of the specimens of this species for an improved management and\nsustainability.<\/li><li>The results of the study, led by AZTI\nresearchers, Naiara Rodr\u00edguez Ezpeleta and Haritz Arrizabalaga, have been\npublished in the prestigious scientific journal, Frontiers in Ecology and the\nEnvironment.<\/li><li>The study has been developed by an\ninternational consortium composed of partners from Africa, Asia, America and\nEurope.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" width=\"1024\" height=\"683\" src=\"https:\/\/www.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-1024x683.jpg\" alt=\"\" class=\"wp-image-13615\" srcset=\"https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2.jpg 1024w, https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-300x200.jpg 300w, https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-768x512.jpg 768w, https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-450x300.jpg 450w, https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-900x600.jpg 900w, https:\/\/old.azti.es\/wp-content\/uploads\/2019\/08\/cimarr\u00f3n2-992x662.jpg 992w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><em>Sukarrieta, 29 August 2019<\/em>.- A genetic birth certificate to identify the origin of bluefin tuna. This has been one of the main achievements of the international research coordinated by AZTI, which has enabled the development of an advanced tool to determine where the Atlantic bluefin tuna specimens come from, which will contribute to the sustainability of the species. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>&#8220;Atlantic bluefin tuna is a very important fishery resource, which had been seriously overexploited until a few years ago and which is still under threat of overfishing and illegal trafficking. Our research has provided an accurate, cost-effective and non-invasive tool for tracing the genetic origin of bluefin tuna specimens&#8221;, assures the head of the study, <\/p><cite> <br>Naiara Rodr\u00edguez Ezpeleta. <\/cite><\/blockquote>\n\n\n\n<p>The\nsystem developed improves the evaluation of the bluefin tuna populations as it\nallows to determine the origin of the individuals that are fished regardless of\ntheir catch location.<\/p>\n\n\n\n<p>The\nAtlantic bluefin tuna consists of two populations: the specimens of the east,\nborn in the Mediterranean and returning there for reproduction, and those of\nthe west, born in the Gulf of Mexico and also returning to their place of\norigin for spawning. This second population is less abundant and requires\ngreater protection. Despite being genetically different, the appearance of\nindividuals from both populations is identical. For this reason, the use of\ngenetic tools that enable identifying the origin of each specimen is key to\nimproving the management of bluefin tuna stocks, optimising the results of the adopted\nmanagement measures and more accurately defining the fishing quotas, which do\nnot affect the eastern and the western tuna the same way. <\/p>\n\n\n\n<p>&#8220;Knowing\nhow much of each population is fished is an essential requirement for an effective\nevaluation and management of bluefin tuna populations. Up to now, this was not possible,\nbut this new tool enables to determine the origin of the tuna captured in the\nAtlantic (mixing area). The main challenge for our study was to gather all\nrequired biological samples to develop the genetic markers, a task for which\ncoordinating an international consortium composed of partners from Africa,\nAsia, America and Europe was necessary &#8220;, adds the researcher.<\/p>\n\n\n\n<p>The\ntool generated within the framework of this research is based on the analysis\nof more than 600 larvae, young of the year and spawning adults collected in the\nmain spawning areas of the species, a very high number given the difficulty of\nobtaining larvae and young bluefin tuna. More specifically, tens of thousands\nof markers distributed in the bluefin tuna genome have been discovered, of\nwhich around one hundred were selected for the origin diagnosis. This tool has\nbeen applied to study the origin of one thousand adult tuna caught throughout\nthe Atlantic.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>&#8220;Our objective is to offer responses to the need of better managing a resource that was in a critical situation up to now. We have tried to resolve the need to correctly determine the origin of each of the large tuna populations, that of the Mediterranean and that of the Gulf of Mexico, which do not mix with each other for breeding but do come together in the sea and have the same appearance, so genetic identification is the only way of distinguishing them&#8221;, <\/p><cite> <br>adds the expert in marine research.  <\/cite><\/blockquote>\n\n\n\n<p>The study, \u201cDetermining natal origin for improved management of Atlantic bluefin tuna\u201d, has also genetically demonstrated that the bluefin tuna returns to its place of birth following several years of transatlantic migrations. <\/p>\n\n\n\n<p>The research, which has been published in the prestigious scientific journal, Frontiers in Ecology and the Environment, has been funded by the \u201cAtlantic Wide Research Program for Bluefin Tuna\u201d, launched by the International Commission for the Conservation of Atlantic Tunas (ICCAT) and within the framework of which AZTI has coordinated a large part of the biological studies since 2011.<\/p>\n\n\n\n<p>The\nstudy has also relied on the support of the Basque Government&#8217;s Department for\nAgriculture, Fisheries and the Food Industry through the GENPES project and the\nSpanish Government&#8217;s Ministry for Science, Innovation and Universities, through\nthe ACEITUNA project. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>The technology centre has coordinated this research that enables the development of a pioneering tool to discover the origin of the specimens of this species for an improved management and [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":13617,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":[],"_tribe_ticket_has_attendee_info_fields":false},"categories":[3],"tags":[561,566,562,563,565,568],"tax-big-challenge":[42,36],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.4.1 - 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