TY - JOUR T1 - Directional bilateral asymmetry in otolith morphology may affect fish stock discrimination based on otolith shape analysis A1 - Mahe,Kelig A1 - Ider,Djamila A1 - Massaro,Andrea A1 - Hamed,Oussama A1 - Jurado-Ruzafa,Alba A1 - Goncalves,Patricia A1 - Anastasopoulou,Aiketerini A1 - Jadaud,Angelique A1 - Mytilineou,Chryssi A1 - Elleboode,Romain A1 - Ramdane,Zohir A1 - Bacha,Mahmoud A1 - Amara,Rachid A1 - de Pontual,Helene A1 - Ernande,Bruno AD - Fisheries Laboratory, IFREMER, 150 Quai Gambetta, BP 699, 62 321 Boulogne-sur-Mer, France AD - Laboratoire de Zoologie Applique´e et d’Ecophysiologie Animale, Universite´ Abderrahmane Mira, Be´jaý¨a, Algerie AD - APLYSIA – Via Menichetti 35, 27121 Livorno, Italy AD - Universite´ de Tunis El Manar, Campus Universitaire, 2092 El Manar II, Tunisie AD - Instituto Espa~nol de Oceanografý´a, Centro Oceanogra´fico de Canarias, 38180 Santa Cruz de Tenerife, Spain AD - Departamento do Mar e Recursos Marinhos, Intituto Portugueˆs do Mar e da Atmosfera (IPMA), Lisboa, Portugal AD - Hellenic Centre for Marine Research, PO Box 712, P.C. 19013, Anavyssos Attiki, Athens, Greece AD - Fisheries Laboratory, IFREMER-UMR MARBEC, Avenue Jean Monnet, CS 30171, 34203 Se`te Cedex, France AD - Laboratoire d’Oce´anologie et de Ge´osciences, Universite´ Littoral Coˆte d’Opale, Univ. Lille, CNRS, UMR 8187, LOG, F 62930 Wimereux, France AD - IFREMER, Sciences et Technologies Halieutiques, CS 10070, 29280 Plouzane´, France UR - https://doi.org/10.1093/icesjms/fsy163 DO - 10.1093/icesjms/fsy163 KW - Boops boops KW - elliptical Fourier analysis KW - Mediterranean Sea KW - side effect KW - stock identification N2 - Otolith shape analysis is an efficient fish stock identification tool. However, most applications used left and right otoliths or only one of them arbitrarily chosen without testing for biases resulting from potential directional bilateral asymmetry (DA) in otolith shape, i.e. a unimodal population-level deviation form bilateral symmetry between right and left otolith shapes. In this study, 560 bogues (Boops boops) were sampled from 11 geographical locations from the Canary Islands to the Aegean Sea and elliptical Fourier descriptors were used to describe their otoliths’ shape. First, a significant otolith DA was observed at the global scale with an average amplitude of 2.77%. However, at the scale of sampling locations, DA was not always significant and varied in amplitude and direction. Second, population structure was investigated using the shape of either right otoliths or left otoliths or both together. Analyses based on right otoliths or both otoliths together, suggested three stock units: a North-Western Mediterranean Sea stock, an Eastern Mediterranean Sea stock, and a Central-Eastern Atlantic Ocean and South-Western Mediterranean Sea stock. In contrast, no coherent geographical pattern was found based on left otoliths. Our results highlight the importance of accounting for potential otolith DA in otolith shape-based stock identification. Y1 - 2019/01 PB - Oxford University Press (OUP) JF - Ices Journal Of Marine Science SN - 1054-3139 VL - 76 IS - 1 SP - 232 EP - 243 ID - 57967 ER -