Table 1.

Description of data sets 1–7 and the single nucleotide polymorphism (SNP) filtering procedures used to create them

Data set number	Number of individuals per population	Total number of individuals	SNP Filtering	Data set completeness requirement for locus inclusion	Data set completeness	Total number of SNPs
1	Tern: 17 Midway: 11 Izu-Torishima: 19	43	None	At least 50% of individuals in at least 2 populations	80%	3455
2	Tern: 17 Midway: 11 Izu-Torishima: 19	43	1 SNP per locus	At least 50% of individuals in at least 2 populations	80%	2769
3	Tern: 17 Midway: 11 Izu-Torishima: 19	43	1 SNP per locus, loci required to have heterozygosity <0.75 and MAF >0.05	At least 50% of individuals in at least 2 populations	80%	2672
4	9	27	1 SNP per locus	At least 50% of individuals in at least 2 populations	80%	2998
5	9	27	1 SNP per locus, loci required to have heterozygosity <0.75 and MAF >0.05	At least 50% of individuals in at least 2 populations	80%	2996
6	9	27	1 SNP per locus	At least 85% of individuals in all 3 populations	94%	672
7	9	27	1 SNP per locus	All individuals in all 3 populations	100%	81

MAF, minor allele frequency.