Interaction between spawning habitat and coastally steered circulation regulate larval fish retention in a large shallow temperate bay
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Autor/esÁlvarez, I. (Itziar); Catalán, I.A. (Ignacio Alberto); Jordi, A. (Antoni); Alemany, F. (Francisco); Basterretxea, G. (Gotzon)
Palabras claveTemperate zones
Larval fish assemblages
Larval retention plays a fundamental role in the persistence of coastal fish assemblages. Here, we examine larval fish distribution and abundance patterns in Palma Bay, a large (∼20 km) wind-driven microtidal bay in the southern coast of Mallorca (Spain, NW Mediterranean Sea). Larval fish assemblage structure in the bay were analyzed during July 2010 and interpreted in the context of the observed circulation patterns, adult habitat distribution and spawning traits. Acoustic Doppler Current Profiler (ADCP) observations showed the presence of retentive flow patterns in the middle of the bay enhancing local larval accumulation and self-recruitment. In consequence, larval abundances were higher in this central part of the bay (∼40 m depth, mean abundance 607.6 ± 383 ind. 10 m−2) than along the coastal fringe (<35 m 113.7 ± 91 ind. 10 m−2). Also, a multivariate predictive approach based on Redundancy Analysis (RDA) revealed differences between the larval fish assemblages in areas inside the ...
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