Genetic connectivity between Atlantic bluefin tuna (ABFT) Larvae Spawned in the GOM and MED
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AuthorsJohnstone, C. (Carolina); Pérez, M. (Montse); Malca, E.; Quintanilla-Hervás, J.M. (José María); Gerard, T.; Lozano-Peral, D.; Alemany, F. (Francisco); Lamkin, J.; García, A.; Laiz-Carrión, R. (Raúl)
Highly migratory Atlantic bluefin tuna (ABFT) is managed as two stocks, Western and Eastern. Western ABFT spawn mainly in the Gulf of Mexico (GOM) and Eastern ABFT in the Mediterranean Sea (MED) (1). Understanding connectivity between ABFT populations is important for conservation and management of this valuable fishery resource that has been exploited for centuries. ABFT are highly mixed, with multiple disciplines supporting weak structuring between Western and Eastern stocks (1). Concerning genetics, subtle structuring of ABFT populations across the Atlantic Ocean has been the conclusion of studies describing genetic tools for traceability (2,3). Larval fish provide the genetic signal of successful breeders and have occasionally been genetically characterized with juveniles (young-of-the-year, YOY) collected in nursery areas. For the first time, cooperative field collection of tuna larvae during 2014 in the main spawning area for each stock enabled us to assess the structuring of ABFT ...
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