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Título

The influence of oceanographic fronts and early-life-history traits on connectivity among littoral fish species

Autor Galarza, Juan A.; Carreras-Carbonell, Josep ; Macpherson, Enrique ; Pascual, Marta; Roques, Séverine ; Turner, George F.; Rico, Ciro
Palabras clave Gene flow
Microsatellite
Ocean circulation
Pelagic stages
Fecha de publicación 21-ene-2009
EditorNational Academy of Sciences (U.S.)
Citación Proc. Natl. Acad. Sci. USA, doi: 10.1073/pnas.0806804106
ResumenThe spatial distribution of neutral genetic diversity is mainly influenced by barriers to dispersal. The nature of such barriers varies according to the dispersal means and capabilities of the organisms concerned. Although these barriers are often obvious on land, in the ocean they can be more difficult to identify. Determining the relative influence of physical and biotic factors on genetic connectivity remains a major challenge for marine ecologists. Here, we compare gene flow patterns of 7 littoral fish species from 6 families with a range of early-life-history traits sampled at the same geographic locations across common environmental discontinuities in the form of oceanic fronts in the Western Mediterranean. We show that these fronts represent major barriers to gene flow and have a strong influence on the population genetic structure of some fish species. We also found no significant relation between the early-life-history traits most commonly investigated (egg type, pelagic larval duration, and inshore-offshore spawning) and gene flow patterns, suggesting that other life-history factors should deserve attention. The fronts analyzed and the underlying physical mechanisms are not site-specific but common among the oceans, suggesting the generality of our findings.
Descripción 6 pages, 3 figures.-- Supplementary information available (Suppl. Tables S1-S8, 9 pages) at: http://www.pnas.org/content/early/2009/01/21/0806804106/suppl/DCSupplemental
Article available Open Access at the publisher's site.
Versión del editorhttp://dx.doi.org/10.1073/pnas.0806804106
URI http://hdl.handle.net/10261/9774
DOI10.1073/pnas.0806804106
ISSN0027-8424
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