Relationships between genetic (F ST/(1-F ST)) and geographic distances. Genetic distances were calculated for all concatenated mitochondrial markers (a.) and all concatenated nuclear markers (b.). Geographic distances were calculated as the shortest distances between pairs of populations without crossing land. Black squares: pairs of populations from Atlantic and Indian oceans. Light squares: pairs of population between lherminieri andbaroli-boydi (crossed) , boydi and baroli (in blue)and bailloni and nicolae (in red) . Coloured circles include only pairs of populations belonging to the same lineage.