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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on March 13, 2007
ICES Journal of Marine Science: Journal du Conseil 2007 64(3):512-518; doi:10.1093/icesjms/fsm017
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© 2007 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Element composition of sardine (Sardina pilchardus) otoliths along the Atlantic Coast of the Iberian Peninsula

B. G. Castro

Universidad de Vigo, Facultad de Ciencias del Mar, Campus Lagoas-Marcosende, 36310 Vigo, Pontevedra, Spain

tel: +34 986 812623; fax: +34 986 812556; e-mail: bcastro{at}uvigo.es

Castro, B. G. 2007. Element composition of sardine (Sardina pilchardus) otoliths along the Atlantic Coast of the Iberian Peninsula. – ICES Journal of Marine Science, 64: 512–518.

The element composition of sardine (Sardina pilchardus) otoliths along the Atlantic Coast of the Iberian Peninsula was determined by bulk analysis, using Inductively Coupled Plasma-Mass Spectrometry. Samples (collected 2003–2005) were classified by area [Bay of Biscay (GV), Northwest (OCN), and Southwest (GC) of the Iberian Peninsula] and size group ( ≤ 15, 16–18, and ≥ 21 cm total length). The chemical composition was compared statistically between areas within size groups and between size groups within areas by ANOVA and a Support Vector Machine method, using 10-fold cross-validation. The element composition of sardine otoliths was similar to that of other marine fish. In all, eight elements (Li, Ba, Mg, Mn, Na, Sr, K, and Ca) were useful in discriminating between areas and/or size groups. Discrimination between areas within size groups was less effective for the biggest size group (67%) than for the middle (89%) or smallest size groups (84%). Discrimination between size groups within areas was better for GC (76%) and GV (84%) than for OCN (60%). The results are interpreted in terms of a net balance of migration of large sardine from OCN towards GV and GC.

Keywords: Iberian Peninsula, otolith chemistry, sardine, stock identification

Received 24 July 2006; accepted 21 January 2007; advance access publication 13 March 2007.


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