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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on August 7, 2008
ICES Journal of Marine Science: Journal du Conseil 2008 65(9):1635-1644; doi:10.1093/icesjms/fsn128
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© 2008 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Spawning groups of European anchovy: population structure and management implications

Núria Sanz, José-Luis García-Marín, Jordi Viñas, Marina Roldán and Carles Pla

Laboratori d’Ictiologia Genètica, Universitat de Girona, Campus Montilivi s/n, E-17071 Girona, Spain. Present address of J. Viñas: Centre Mediterrani d’Investigacions Marines i Ambientals, Passeig Marítim de la Barceloneta, 37–49, E-08003 Barcelona, Spain

Correspondence to N. Sanz: tel: +34 972 418168; fax: +34 972 418277; e-mail: nuria.sanz{at}udg.es.

Sanz, N., García-Marín, J-L., Viñas, J., Roldán, M., and Pla, C. 2008. Spawning groups of European anchovy: population structure and management implications. – ICES Journal of Marine Science, 65: 1635–1644.

Samples of Engraulis encrasicolus from the western Mediterranean and the eastern Atlantic spawning groups were examined by protein electrophoresis to investigate their relevance in the genetic structure of European anchovy, and how they fit with the current definition of anchovy fisheries. Samples from an earlier study were also included in the analyses to assess the temporal genetic stability of spawning groups. Gene diversity analysis indicated greater differentiation between spawning groups within seas (GRS = 0.046) than between seas (GSEA = 0.022), and lesser differentiation between locations within spawning groups (GLR = 0.003), as well as genetic stability of spawning groups (GCL = 0.002). The six spawning groups apparently involved three genetic units according to STRUCTURE results, and the results of other analyses also suggested genetic differences between the two Atlantic spawning groups. The genetic substructure detected within the Atlantic agrees with the spawning groups, but does not fit easily with ICES Subdivisions. Based on these results, a revision of the current anchovy management in both Alboran Sea and Bay of Biscay areas is suggested.

Keywords: allozymes, anchovy, fishery stock, population structure

Received 11 November 2007; accepted 30 June 2008; advance access publication 7 August 2008.


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