Event Abstract Back to Event Otolith shape analysis as a tool for stock discrimination of the blue jack mackerel (Trachurus picturatus) in the northeast Atlantic Joana P. Vasconcelos1, 2, 3*, José A. González4 and Leonel S. Gordo5 1 Direção de Serviços de Investigação e Desenvolvimento das Pescas / Direção Regional de Pescas, Portugal 2 MARE – Marine and Environemental Sciences, Portugal 3 Universidade da Madeira, Portugal 4 Applied Marine Ecology and Fisheries group, i-UNAT, University of Las Palmas de Gran Canaria, Spain 5 Departamento de Biologia Animal & MARE Faculdade de Ciências da Universidade de Lisboa, Portugal The stock structure of the blue jack mackerel, Trachurus picturatus (Osteichthyes, Carangidae), in the Northeast Atlantic is still unknown. The knowledge of this important aspect of the species population dynamics is essential to effectively assess their stocks and manage their fisheries. Otolith shape analysis has been successfully applied in stock identification using the elliptic Fourier approach. This methodology was used to evaluate possible differences in the otolith shape of T. picturatus specimens caught off mainland Portugal (Peniche) and around Madeira and Canary Islands. A total of 300 individuals ranging from 17 to 36 cm in total length, equally distributed by area, were analysed. The multivariate analysis of variance performed on the otolith normalized elliptic Fourier descriptors (NEFDs) revealed significant differences among the three areas. An overall classification success of 86.3% in the canonical discriminant analysis was achieved for both sexes combined. These results suggest the usefulness of otolith shape analysis for stock differentiation of blue jack mackerel from the northeast Atlantic. Keywords: Blue jack mackerel, Trachurus picturatus, otolith, Shape Analysis, elliptical Fourier analysis, Stock discrimination, Northeast Atlantic Conference: XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016. Presentation Type: Poster Presentation Topic: 4. FISHERIES, AQUACULTURE AND BIOTECHNOLOGY Citation: Vasconcelos JP, González JA and Gordo LS (2016). Otolith shape analysis as a tool for stock discrimination of the blue jack mackerel (Trachurus picturatus) in the northeast Atlantic. Front. Mar. Sci. Conference Abstract: XIX Iberian Symposium on Marine Biology Studies. doi: 10.3389/conf.FMARS.2016.05.00115 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 29 Apr 2016; Published Online: 03 Sep 2016. * Correspondence: MD. Joana P Vasconcelos, Direção de Serviços de Investigação e Desenvolvimento das Pescas / Direção Regional de Pescas, Funchal, Madeira, 9004-562, Portugal, joana.vasco@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Joana P Vasconcelos José A González Leonel S Gordo Google Joana P Vasconcelos José A González Leonel S Gordo Google Scholar Joana P Vasconcelos José A González Leonel S Gordo PubMed Joana P Vasconcelos José A González Leonel S Gordo Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.
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