Table 2 PCR primers used in this study for the amplification of the mitochondrial NADH dehydrogenase 1 (ND1) and cytochrome c oxidase subunit 1 (COI) genes, as well as the control region (CR) from aDNA extracts from bones of Atlantic walrus (Odobenus rosmarus) from Svalbard

ND1-1

ND1-1F^a

ACCCCGCCTGTTTACCAAAAACAT

ND1-1R

TATATTCCCGCCTCTTCACG

ND1-2

ND1-2F

GCCACACGAGGGTTCTACTG

ND1-2R

TCGGGGGTTGTGCTATACTC

ND1-3

ND1-3F

GGGACAGCAATTTAGGTTGG

ND1-3R^b

TGTCCTGATCCAACATCGAG

ND1-4

ND1-4F^b

GGGATAACAGCGCAATCCTA

ND1-4R

TAGTCCTAAGGCGCTTCGTC

ND1-5

ND1-5F

CAAGAGAGACAAGGCCCACT

ND1-5R

GGAAGGCTACGGCTAGAAGAA

ND1-6

ND1-6F

CTTTTACCCCCAGAGGTTCA

ND1-6R^b

TGGTCGTAAAGGTTCCTTGG

ND1-7

ND1-7F^b

GGACCATACGGACTTCTCCA

ND1-7R

CGGCTAGGCTTGATATTGCT

ND1-8

ND1-8F

CCTATACCGTACCCTCTCATCA

ND1-8R

TGGTTAAAGAGAATGATCCGTTT

ND1-9

ND1-9F

GCCATCATTCTCTTGTCCGTA

ND1-9R^b

CCAGGAAGAATAGGGCGAAT

ND1-10

ND1-10F^b

CAGAATTAGTATCAGGCTTCAACG

ND1-10R

ATGATGCCCGAATTCATAGG

ND1-11

ND1-11F

TTCACAACCACTCTATTTCTTGGA

ND1-11R

TTGTGGAGGAACACTTGCTG

ND1-12

ND1-12F

TGCATATGACACATGGCTCTG

ND1-12R^b

GGTATGGGCCCGATAGCTTA

COI-1

COI-1F^b

ACAAGGACATCGGCACTCTC

COI-1R^b

GCTCCGATTATTAGGGGAACT

COI-2

COI-2F^b

GCCCATGCATTCGTAATAATC

COI-2R^b

GATGGTCCTGCGTGAGCTA

COI-3

COI-3F^b

GAACCGGATGAACCGTCTAC

COI-3R^b

CCGCTGTAATTAATACGGACCA

COI-4

COI-4F^b

CTCCCGCAATATCCCAATAC

COI-4R^b

TTCCGAATCCTGGTAGAATGA

CR-1

CR-1F^b

GCCTATTGCCGGTATAATCG

DL-1R^b

TGTGATGGTACAGTAGGGGTGA

CR-2

CR-2F^b

CTGACGCCCTACCATTCATA

DL-2R^b

AAGGGTTGCTGGTTTCTCG

CR-3

CR-3F^b

AATTCACTTGGTCCGTCAAGC

DL-3R^b

TTATGTGTGATCATGGGCTGA

CR-4

CR-4F^b

TGGGACATCTCGATGGACTT

DL-4R^b

CGTGTATGTCCTGTGACCATT