Species identification of megrim samples obtained before and after the Prestige accident.

Results are presented as the number (percent) of individuals. A first classification of individuals in interspecific hybrid or in each of the pure Lepidorhombus species was based on the 5S rDNA marker. Afterwards, hybrid individuals were classified as belonging to one of the two main species based on external phenotype and mitochondrial D-loop sequences (maternal species) as Hyb Lw (both L. whiffiagonis phenotype and mother) or Hyb Lb (both L. boscii phenotype and mother). N: total number of samples.