FN Archimer Export Format PT J TI Blue whiting otoliths pair’s symmetry side effect BT AF Gonçalves, Patricia MAHE, Kelig ELLEBOODE, Romain CHANTRE, Celina MURTA, Alberto Avila de Melo, Antonio Cabral, Henrique AS 1:1,2;2:3;3:3;4:3;5:;6:1;7:2; FF 1:;2:PDG-RBE-HMMN-RHBL;3:PDG-RBE-HMMN-RHBL;4:PDG-RBE-HMMN-RHBL;5:;6:;7:; C2 IPMA, PORTUGAL UNIV LISBON, PORTUGAL IFREMER, FRANCE SI BOULOGNE SE PDG-RBE-HMMN-RHBL TC 0 UR https://archimer.ifremer.fr/doc/00388/49887/50448.pdf LA English DT Article DE ;Otoliths image analysis;morphometry analysis;fish otoliths;marine science application;elliptic Fourier analysis AB Otoliths are paired calcified structures located in the inner ear of the teleost fishes. Fisheries scientists have been using the otoliths for a variety of applications as fish ageing, species identification and also species interaction. The symmetry between left and right otoliths is considered species dependent. The application of analysis techniques on otoliths images has been increasing in recent years. The diagnosis on otoliths symmetry as a species characteristic is currently being done. It is expected that the otolith surface (distal versus proximal) used to collect images should have no influence on the symmetry results. The goal of this study is to investigate if the otolith position (distal versus proximal) when analyse images has influence in the diagnostic of the symmetry shape between the left and right otoliths. The results showed that the otolith face orientation should be taken into account during the otoliths images processing for symmetry shape analysis. On blue whiting the otolith images should always be obtained from the concave side, because for symmetry studies the position real matter. PY 2017 SO International Journal of Fisheries and Aquatic Studies SN 2394-0506 PU IJFAS VL 5 IS 3 Part A BP 06 EP 09 ID 49887 ER EF