Population structure of the blue jack mackerel (Trachurus picturatus) in the NE Atlantic inferred from otolith fingerprinting

Abstract

Event Abstract Back to Event Population structure of the blue jack mackerel (Trachurus picturatus) in the NE Atlantic inferred from otolith fingerprinting Cláudia Moreira1, 2*, Elsa Froufe1 and Alberto T. Correia1, 3 1 Centro Interdiscilinar de Investigação Marinha e Ambiental (CIIMAR-CIMAR), Portugal 2 Instituto Ciências Biomédicas Abel Salazar da Universidade do Porto (ICBAS-UP), Portugal 3 Faculdade de Ciências da Saúde da Universidade Fernando Pessoa (FCS-UFP), Portugal The blue jack mackerel Trachurus picturatus is a pelagic fish widely distributed in the NE Atlantic, also found in the Mediterranean and Black Seas. In the Azores, Madeira and Canary Islands this species is an economically important resource. Although, there are some background studies on age, growth, reproductive seasons and parasites, information about the population structure of this species has not been, so far, published. For that, fluctuations in the captures and landings are difficult to explain. In this study, the elemental signatures of whole sagittal otoliths was determined by inductively coupled plasma mass spectrometry. Adult fish were sampled in the fishery grounds of the Islands of Azores, Madeira and Canaries and in the Portuguese mainland coast at Matosinhos, Peniche and Portimão, during the spring-summer of 2013. The Sr:Ca, Li:Ca, Mg:Ca, Mn:Ca, Ba:Ca, Pb:Ca and Fe:Ca were used to discriminate the individuals from different fishing grounds. The canonical analysis of the element:Ca ratios provided a clear separation of the individuals in four main regions – Azores, Madeira, Canary Islands and Portugal mainland - although with some degree of overlapping in the samples from the Portuguese mainland coast. The Jackknifed classification accuracy was high, ranging from 65 % (Matosinhos) to 85 % (Azores), and an overall mean of 76 % was recorded. The results suggest that the population of T. picturatus in the NE Atlantic may be separated in, at least, 4 population units - Azores, Madeira, Canary Islands and Portugal Mainland - which indicates that, in terms of fisheries management, this species should be treated as different stocks. Nevertheless, more methodologies (including molecular biology analysis) are being applied to the collected individuals to complement the data obtained in a way of having an holistic approach to this issue. Acknowledgements The first author has a grant from the Portuguese Foundation for Science and Technology (SFRH/BD/111133/2015). This article is a result of the project MarInfo – Integrated Platform for Marine Data Acquisition and Analysis (NORTE-01-0145-FEDER-000035) supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF). Keywords: Trachurs, population structure, otoliths, Fisheries Management, elemental analysis Conference: XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016. Presentation Type: Oral Presentation Topic: 4. FISHERIES, AQUACULTURE AND BIOTECHNOLOGY Citation: Moreira C, Froufe E and Correia AT (2016). Population structure of the blue jack mackerel (Trachurus picturatus) in the NE Atlantic inferred from otolith fingerprinting. Front. Mar. Sci. Conference Abstract: XIX Iberian Symposium on Marine Biology Studies. doi: 10.3389/conf.FMARS.2016.05.00223 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: 30 Apr 2016; Published Online: 21 Dec 2016. * Correspondence: MD. Cláudia Moreira, Centro Interdiscilinar de Investigação Marinha e Ambiental (CIIMAR-CIMAR), Porto, Portugal, claudyamoreira@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 Cláudia Moreira Elsa Froufe Alberto T Correia Google Cláudia Moreira Elsa Froufe Alberto T Correia Google Scholar Cláudia Moreira Elsa Froufe Alberto T Correia PubMed Cláudia Moreira Elsa Froufe Alberto T Correia 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.