Genetic diversity indices from mtDNA Control Region sequences and 12 microsatellite loci by localities (defined in Table 1 and Figure 1).

The right most column shows the result of Welsh’s t-test between the populations of Staats Island and each its three potential continental source populations. n: number of haplotypes; np: number of private haplotypes; h: haplotype diversity; π: nucleotide diversity; A: mean number of alleles per locus; Ap: privates alleles; He: mean expected heterozygosity; Ho: mean observed heterozygosity; Welch p-value: significance value of Welch's t-test between the SI population and each of the other populations (e.g. Welch t-test between SI and ML has a p-value of 0.2948), n.p.: test not performed. Deviations from zero *p<0.05, **p<0.001.