Directional bilateral asymmetry in otolith morphology may affect fish stock discrimination based on otolith shape analysis
Type | Article | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | 2019-01 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Mahe Kelig![]() ![]() ![]() |
||||||||||||||||
Affiliation(s) | 1 : Fisheries Laboratory, IFREMER, 150 Quai Gambetta, BP 699, 62 321 Boulogne-sur-Mer, France 2 : Laboratoire de Zoologie Applique´e et d’Ecophysiologie Animale, Universite´ Abderrahmane Mira, Be´jaý¨a, Algerie 3 : APLYSIA – Via Menichetti 35, 27121 Livorno, Italy 4 : Universite´ de Tunis El Manar, Campus Universitaire, 2092 El Manar II, Tunisie 5 : Instituto Espa~nol de Oceanografý´a, Centro Oceanogra´fico de Canarias, 38180 Santa Cruz de Tenerife, Spain 6 : Departamento do Mar e Recursos Marinhos, Intituto Portugueˆs do Mar e da Atmosfera (IPMA), Lisboa, Portugal 7 : Hellenic Centre for Marine Research, PO Box 712, P.C. 19013, Anavyssos Attiki, Athens, Greece 8 : Fisheries Laboratory, IFREMER-UMR MARBEC, Avenue Jean Monnet, CS 30171, 34203 Se`te Cedex, France 9 : Laboratoire d’Oce´anologie et de Ge´osciences, Universite´ Littoral Coˆte d’Opale, Univ. Lille, CNRS, UMR 8187, LOG, F 62930 Wimereux, France 10 : IFREMER, Sciences et Technologies Halieutiques, CS 10070, 29280 Plouzane´, France |
||||||||||||||||
Source | Ices Journal Of Marine Science (1054-3139) (Oxford University Press (OUP)), 2019-01 , Vol. 76 , N. 1 , P. 232-243 | ||||||||||||||||
DOI | 10.1093/icesjms/fsy163 | ||||||||||||||||
WOS© Times Cited | 26 | ||||||||||||||||
Keyword(s) | Boops boops, elliptical Fourier analysis, Mediterranean Sea, side effect, stock identification | ||||||||||||||||
Abstract | 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. |
||||||||||||||||
Full Text |
|