Chemical profiles in otoliths from 3 fish species along the Moroccan coast: accumulation and migration patterns

Abstract

Event Abstract Back to Event Chemical profiles in otoliths from 3 fish species along the Moroccan coast: accumulation and migration patterns Maylis Labonne1, Hicham Masski2*, Raymond Lae1, Sophia Talba2, Claire Bassoulet3, Eric Dabas1, Imane Tai2, Jean Marie Munaron1 and Luis Tito De Morais1 1 UMR 6539 IRD/CNRS/UBO LEMAR, IUEM,, France 2 INRH, Morocco 3 UMS 3113, PSO, IUEM, France The Canary Current Large Ecosystem is characterized by a major, nutrient-rich up-welling of deep, cold oceanic waters, which stimulates high biological productivity that results in an abundance of both pelagic and demersal fishery resources. In this area, the Moroccan coast is also under direct anthropogenic activities influences such as phosphates industries. Several observations indicate that variations of the upwelling activities observed in the recent years would generate the remobilization of the contaminants. Our study deals with the metallic concentrations in the otoliths of 3 fish species of economic interest ( Merlucius merlucius, Pagellus acarne, Sardina pilchardus) along the Moroccan coast. The fishes were collected in markets in june 2012 for the northern part of Morocco (during the maximum of the upwelling activity) and in November 2012 for the southern part. Concentrations were measured by ICP-MS on transects from nucleus to the edge of otoliths to characterize environmental variations or accumulations linked to ecophases and growth. For each species, 5 fishes were analyzed in 7 locations from North to south of the Moroccan Atlantic coast. First results indicate that the concentrations are highly variable in hake transects, and on the other hand, transects in seabreams seem very stable regardless of location. Transects in sardines indicate different patterns depending on the locations and, some of them, clearly show the upwelling signature. Keywords: Otolith microchemistry, Sardine, hake, Pagellus acarne, Morocco Conference: XV European Congress of Ichthyology, Porto, Portugal, 7 Sep - 11 Sep, 2015. Presentation Type: Oral Presentation Topic: Otoliths as a tool to study fish life cycles Citation: Labonne M, Masski H, Lae R, Talba S, Bassoulet C, Dabas E, Tai I, Munaron J and Tito De Morais L (2015). Chemical profiles in otoliths from 3 fish species along the Moroccan coast: accumulation and migration patterns. Front. Mar. Sci. Conference Abstract: XV European Congress of Ichthyology. doi: 10.3389/conf.fmars.2015.03.00126 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: 23 Nov 2015; Published Online: 24 Nov 2015. * Correspondence: Dr. Hicham Masski, INRH, Casablanca, Morocco, hmasski@protonmail.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 Maylis Labonne Hicham Masski Raymond Lae Sophia Talba Claire Bassoulet Eric Dabas Imane Tai Jean Marie Munaron Luis Tito De Morais Google Maylis Labonne Hicham Masski Raymond Lae Sophia Talba Claire Bassoulet Eric Dabas Imane Tai Jean Marie Munaron Luis Tito De Morais Google Scholar Maylis Labonne Hicham Masski Raymond Lae Sophia Talba Claire Bassoulet Eric Dabas Imane Tai Jean Marie Munaron Luis Tito De Morais PubMed Maylis Labonne Hicham Masski Raymond Lae Sophia Talba Claire Bassoulet Eric Dabas Imane Tai Jean Marie Munaron Luis Tito De Morais 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.