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Table 1 Information on Galápagos marine iguanas.

From: Progressive colonization and restricted gene flow shape island-dependent population structure in Galápagos marine iguanas (Amblyrhynchus cristatus)

Island

Island Age (Myr)

Population size estimates

Population

Microsatellite loci

Mitochondrial Control Region (CR)

    

N

N alleles

Hobs

k-test

N

H

Hd

π

K

Fs

D

Española

3.31-3.54

1,700-21,000

EPC (Punta Cevallos)a,b

99

9.07

0.79

7 (p = 0.46)

98

6

0.656

0.00193

2.271

2.65

-1.20

Fernandina

0.04

15,000-120,000

FCH (Capo Hammond)a

28

9.5

0.72

9 (p = 0.11)

20

10

0.900

0.00281

3.311

-2.35

-0.80

   

FPE (Punta Espinosa)a,b

99

11.6

0.78

8 (p = 0.25)

86

27

0.946

0.00332

3.911

-11.40**

-0.55

   

FPM (Punta Mangle)a,b

78

10.7

0.79

10* (p = 0.037)

73

32

0.950

0.00328

3.872

-20.84**

-1.48*

Floreana

1.52-2.34

2,000-16,000

FMO (Punta Montura)a,b

51

8.7

0.78

6 (p = 0.67)

60

12

0.786

0.00423

4.983

0.98

0.18

Genovesa

0.35

900-15,000

GCA (Campamente)a,b

92

6.7

0.70

6(p = 0.67)

81

5

0.574

0.00299

3.021

6.26

0.48

Isabela

0.313-535

5,000-40,000

IBU (Bahia Urvina)b

17

8.9

0.79

8(p = 0.25)

15

10

0.924

0.00367

4.324

-2.65

-0.49

   

IWE (Cabo West)b

-

-

-

-

13

5

0.628

0.00137

1.615

-0.58

-1.45

   

ICB (Caleta Black)a

-

-

-

-

7

7

1.000

0.00364

4.286

-3.40*

-1.05

   

ICW (Caleta Webb)a,b

40

10

0.74

8(p = 0.25)

30

8

0.724

0.00333

3.922

1.02

0.64

   

IBA (Cerro Ballena)b

22

9.1

0.76

8(p = 0.25)

21

4

0.271

0.00078

0.914

-0.16

-1.72*

   

IPA (Punta Albemarle)a,b

61

9.4

0.77

7(p = 0.46)

54

7

0.681

0.00337

3.969

3.42

0.62

Marchena

0.56

1,000-10,000

MBN 1993 (Bahia Negra)

30

7.7

0.76

5(p = 0.84)

29

4

0.685

0.00324

3.823

5.37

1.60

   

MBN 2004 (Bahia Negra)

49

7.7

0.78

7(p = 0.46)

49

2

0.250

0.00212

2.500

8.57

0.33

Pinta

0.70

800-6,000

PCI (Caleta Ibetson)a,b

94

6.1

0.64

6(p = 0.67)

94

6

0.431

0.00118

1.388

0.63

0.42

Pinzón

1.40-1.73

200-900

PDL (Dumb Landing)a

9

5.9

0.76

7(p = 0.46)

12

4

0.682

0.00084

0.985

-0.65

-0.90

Rábida

1.06-1.56

200-2,000

RAB (No name)b

10

5.1

0.71

7(p = 0.46)

11

3

0.473

0.00308

3.756

4.00

-0.14

San Cristóbal

2.35-4.04

50-400

SRL (Loberia)a,b

82

6.3

0.70

4(p = 0.94)

83

3

0.616

0.00220

2.589

7.53

2.67

   

SRP (Punta Pitt)a

20

3.9

0.51

5(p = 0.84)

20

1

0.000

0.00000

0.000

NA

NA

Santa Cruz

1.31-2.26

2,000-13,000

SCZ (Estacion/Camaño)a,b

135

9.5

0.80

7(p = 0.46)

116

2

0.017

0.00007

0.086

-0.56

-1.89

Santa Fé

2.85

3,000-16,000

SFN (North)a

52

8.4

0.80

8(p = 0.25)

52

4

0.587

0.00079

0.932

0.72

0.12

   

SFM (Miedo)a,b

82

8.5

0.75

9(p = 0.11)

82

6

0.702

0.00283

3.341

4.53

2.18

   

SFX (Bahia Paraiso)b

24

8.4

0.80

7(p = 0.46)

25

5

0.643

0.00175

2.067

1.14

0.43

Santiago

0.77-1.42

450-4,000

SJB (James Bay)a,b

51

7.7

0.76

10*(p = 0.037)

72

3

0.547

0.00607

7.160

18.49

3.81

Overall

 

37,000-280,000

 

1225

   

1203

106

     
  1. Population localities, sample sizes, island ages, and summary data for 13 microsatellite loci and the mitochondrial control region (CR).
  2. Island ages are in millions of years (myr) and were derived from plate velocity and potassium-argon (KAr) dating estimates from multiple sources [3, 17, 82, 86, 87]. Estimates of population sizes were compiled in [78]. Microsatellite loci data: N, sample size for each population; N alleles , average number of alleles; Hobs, observed heterozygosity; intra-locus k-test statistic, number of loci out of 13 loci that showed negative k values and the corresponding p value (specific k values are provided by suppl. table 3). Control Region data: N, sample size for each population; H, number of haplotypes; Hd, haplotype diversity;, nucleotide diversity; K, average number of nucleotide differences between sequences; FS, Fu's neutrality statistic [51]; D, Tajima's neutrality statistic [52]. For the complete table: * and ** denote significance at the = 0.05 and = 0.01 levels respectively. Populations were sampled in 1991/1993aand/or 2004b.