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Stay off the motorway: Resolving the pre-recruitment life history dynamics of the European anchovy in the {SW} Mediterranean through a spatially-explicit individual-based model ({SEIBM})

TitleStay off the motorway: Resolving the pre-recruitment life history dynamics of the European anchovy in the {SW} Mediterranean through a spatially-explicit individual-based model ({SEIBM})
Publication TypeJournal Article
Year of Publication2013
AuthorsCatalán, IA, Macías, D, Solé, J, Ospina-Álvarez, A, Ruiz, J
JournalProgress in Oceanography
Volume111
Pagination140–153
ISSN0079-6611
Abstract

We explore the underlying mechanisms of the early life history dynamics of the European anchovy, Engraulis encrasicolus, in the {SW} Mediterranean. By using a 3D {ROMS} hydrodynamic model coupled to an individual-based model ({IBM}) of the larval stages of the European anchovy, we tested the following hypotheses: (1) the plausible effective spawning zones (those generating late larvae to the known nursery grounds) are mainly found in the vicinity of Malaga Bay, as suggested by published empirical data; (2) the observed, back-calculated growth of larvae sampled in the nursery grounds can be reasonably simulated by a simple temperature-dependent growth model; and (3) the inclusion of biological behavior in the {IBM} significantly improves the match between the observed and modeled late-larval recruitment and/or growth patterns. We performed simulations for the peak spawning season in 2008, for which survey data were available, and an average climatological run. Hypothesis 1 was accepted, whereas hypothesis 2 resulted in a good imitation of anchovy growth only after 10 days post-hatch. The inclusion of an empirically derived equation for egg buoyancy in the model (hypothesis 3) resulted in a slight improvement of the model of late-larval recruitment patterns. Finally, our model was used to explore possible retention-based nursery areas in the whole Alboran Sea. Our simulations showed to agree well with the existing data both in the European and in the African coast and confer the physics a dominant role in shaping the spatial dynamics of early life stages of anchovy in the area.

URLhttp://www.sciencedirect.com/science/article/pii/S0079661113000189
DOI10.1016/j.pocean.2013.02.001