Genetic analysis reveals the presence of frigate tuna (Auxis thazard) in the bullet tuna (A. rochei) fishery of the Iberian Peninsula and the western-central Mediterranean
One the problems with fisheries assessment and management is the presence of multiple species in a single fishery. In such cases, each species may respond differently to management measures. In this study, we report for the first time the presence of a second species, the frigate tuna, Auxis thazard...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2019 |
| País: | España |
| Recursos: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositório: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/326144 |
| Acesso em linha: | http://hdl.handle.net/10261/326144 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Centro Oceanográfico de Málaga Pesquerías |
| Resumo: | One the problems with fisheries assessment and management is the presence of multiple species in a single fishery. In such cases, each species may respond differently to management measures. In this study, we report for the first time the presence of a second species, the frigate tuna, Auxis thazard (Lacépède, 1800), in the fishery for bullet tuna, Auxis rochei (Risso, 1810), off the Iberian Peninsula and the western-central Mediterranean Sea. The bullet tuna is heavily targeted by both artisanal and commercial fisheries; thus, the presence of a second species may complicate management. Seven frigate tuna individuals (1.6%; 95% CI 0.7%-3.4%) were detected after analyzing more than 400 individuals, and they were unambiguously assigned to the species bullet tuna after the analysis of two unlinked genetic loci (nuclear gene Tmo-4c4 and the mitochondrial DNA control region). The unexpected presence of a species distributed in temperate and tropical waters, such as the frigate tuna in this northern location, may be a consequence of global warming. However, continuous monitoring with a validated methodology for species identification is needed to confirm this hypothesis. |
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