Table 2 Genetic diversity measures for the SSR-GBAS markers for each population of Cardita calyculata: sample Size/analysed loci (N), no. Alleles (na), no. Effective alleles (ne), Shannon’s Information Index (I), observed heterozygosity (Ho) and unbiased expected heterozygosity (uHe), inbreeding coefficient (FIS) and number of loci deviating from hardy-Weinberg equilibrium (HWE) out of 21 overall loci. GRX: Granada, Spain. PIX: Pico Island, Azores. SJZ: São Jorge Island, Azores. SMG: São Miguel Island, Azores. FUE: Fuerteventura, Canary Islands. LAN: Lanzarote, Canary Islands. LAG: La Graciosa, Canary Islands. Mean and standard errors (SE) values over the 22 loci are presented

Càleton, GRX

Mean

8.905

4.524

2.844

1.008

0.323

0.508

0.339

9

SE

1.244

0.833

0.559

0.166

0.076

0.073

0.103

Velas, SJZ

Mean

24.476

9.619

4.255

1.578

0.494

0.677

0.284

14

SE

1.156

0.829

0.501

0.141

0.067

0.051

0.082

Lajes do Pico, PIX

Mean

21.429

7.714

3.673

1.360

0.494

0.613

0.171

8

SE

1.146

0.903

0.474

0.154

0.072

0.062

0.071

Playa de la Cocina, LAG

Mean

6.762

4.524

3.004

1.176

0.318

0.647

0.475

13

SE

0.581

0.505

0.284

0.117

0.060

0.055

0.084

Playa Quemada, LAN

Mean

13.381

7.286

4.410

1.413

0.397

0.645

0.367

14

SE

1.245

1.143

0.755

0.176

0.061

0.064

0.068

Pechiguera, LAN

Mean

15.905

7.048

4.270

1.441

0.370

0.666

0.468

15

SE

1.426

0.832

0.598

0.153

0.057

0.059

0.062

Bajas de Bristol, FUE

Mean

4.952

4.429

3.395

1.148

0.374

0.619

0.332

3

SE

0.455

0.563

0.449

0.153

0.071

0.075

0.091

Playa del Hierro, FUE

Mean

14.429

7.905

4.715

1.547

0.425

0.701

0.361

9

SE

1.362

1.021

0.719

0.159

0.068

0.057

0.083

Los Lapios, FUE

Mean

9.143

5.762

3.855

1.265

0.423

0.603

0.294

10

SE

0.874

0.752

0.691

0.166

0.071

0.069

0.072

Playa de la Barra, FUE

Mean

4.952

4.143

3.172

1.133

0.360

0.653

0.445

8

SE

0.455

0.489

0.399

0.127

0.076

0.059

0.100