Summary statistics of nucleotidic polymorphism for mitochondrial and nuclear sequences.

Ba: Bathymodiolus azoricus (Rb: Rainbow; MG: Menez Gwen); Bp_Lg: B. puteoserpentis Logatchev; Bt_7S: B. thermophilus 7°S. N: Number of sequences. L: Average length (bp) of the sequences from each species. S: Number of polymorphic sites. θ: Estimate of 2Nfμ (mtDNA) (Nf is the effective number of females) or 4Neμ (nuclear DNA) per base pair using the number of polymorphic sites [35]. π: Estimate of 2Nfμ (mtDNA) or 4Neμ (nuclear DNA) using the average number of nucleotide difference per site [36]. Tajima's D: Tajima's statistic [37]. R2: Ramos-Onsins and Rozas statistic [38]. Significativity tested by coalescent simulation (given the number of segregating sites and no recombination) (*: p<0.05; **: p<0.01). Div.: Average number of nucleotidic substitutions per site between populations. SAA: Same As Above. Фst: population differentiation, tested by 1000 permutations with the Arlequin software (*: p<0.05; ***: p<0.001).