Lett Christophe auteur aut IRD Roy Claude auteur aut IRD Levasseur Anne auteur aut IRD van der Lingen C. D. auteur aut IRD Mullon Christian auteur aut IRD text journalArticle eng text/pdf born digital access Important environmental processes for the survival and recruitment of early life stages of pelagic fishes have been synthesized through Bakun's fundamental triad as enrichment, concentration and retention processes (A. Bakun, 1996, Patterns in the Ocean. Ocean Processes and Marine Population Dynamics. San Diego, CA, USA: University of California Sea Grant). This conceptual framework states that from favourable spawning habitats, eggs and larvae would be transported to and/or retained in places where food originating from enrichment areas would be concentrated. We propose a method for quantifying two of the triad processes, enrichment and retention, based on the Lagrangian tracking of particles transported within water velocity fields generated by a three-dimensional hydrodynamic model. We apply this method to the southern Benguela upwelling ecosystem, constructing putative maps of enrichment and retention. We comment on these maps regarding main features of the circulation in the region, and investigate seasonal variability of the processes. We finally discuss the results in relation to available knowledge on the reproductive strategies of two pelagic clupeoid species abundant in the southern Benguela, anchovy (Engraulis encrasicolus) and sardine (Sardinops sagax). Our approach is intended to be sufficiently generic so as to allow its application to other upwelling systems. specialized anchovy Benguela concentration Engraulis encrasicolus enrichment hydrodynamic model ichthyoplankton Lagrangian mesoscale ocean triad reproductive strategy retention sardine Sardinops sagax simulation transport upwelling 036 020 15 5 363-372 2006 1054-6006 https://www.documentation.ird.fr/hor/fdi:010035761 10.1016/j.meegid.2006.01.007 1054-6006 [F B010035761] https://www.documentation.ird.fr/hor/fdi:010035761 https://www.documentation.ird.fr/intranet/publi/2006/09/010035761.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2006-10-06 2017-08-23 fdi:010035761 fre