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Table 1 Sampling locations and sample sizes

From: Tracing early stages of species differentiation: Ecological, morphological and genetic divergence of Galápagos sea lion populations

Taxa

Island (code on map)

Coordinates

Number of samples

Differentiation scenario: geological/ecological

   

≥ 625 bp mtDNA

Amplifying ≥ 21 microsatellite loci

Stable isotope analysis

 

Zalophus wollebaeki

(Galápagos sea lion)

Caamaño (CA)

0°46'58''S,

90°17'42''W

27

30

10

group 1/Centre

 

Floreana (CF)

1°14'16''S,

90°23'16''W

30

29

11

group 1/Centre

 

Mosquera (MO)

0°24'58''S,

90°16'42''W

40

40

10

group 1/Centre

 

Santiago (SA)

0°14'18''S,

90°52'25''W

29

30

10

group 1/Centre

 

Santa Fé (SF)

0°48'18''S,

90°02'25''W

35

39

10

group1/Centre

 

Española * (ECEG)

1°22'07''S,

89°38'32''W

29

28

19

group 2/Centre

 

San Cristobal* (ILZN)

0°52'30''S,

89°36'00''W

23

47

--

group 2/Centre

 

Pinta (PC)

0°32'10''N,

90°44'20''W

30

30

10

group 3/Centre

 

Genovesa (GE)

0°18'16''N,

89°57'16''W

13

14

14

group 3/Centre

 

Isabela (IV)

0°57'58''S,

90°57'42''W

30

30

--

group 4/Centre

 

Fernandina (FH)

0°28'18''S,

91°36'25''W

23

23

22

group 4/West

 

Isabela *(IBES)

0°09'44''S,

91°25'25''W

27

27

24

group 4/West

Arctocephalus galapagoensis

(Galápagos fur seal)

Fernandina (Ag_FH)

0°28'11''S,

91°37'38'' W

--

--

30

 
 

Isabela Banks Bay (Ag_IB)

0°01'09''S,

91°29'52''W

--

--

30

 
 

Isabela Marshal Bay (Ag_IM)

0°03'58''N,

91°17'12''W

--

--

30

 

Zalophus californianus

(Californian sea lion)

Año Nuevo Island

37°06'N,

122°19'W

--

14

--

 
 

Moss Landing Beach

36°47'N,

121°47'W

--

2

--

 

TOTAL

  

336(GSL)

367(GSL)

140(GSL)

 
    

11(CSL)

90 (GFS)

 
  1. Colony locations, number of samples in final analyses and differentiation scenario used for estimation of hierarchical population differentiation for the Galapagos sea lion (GSL), the Californian sea lion (CSL) and the Galapagos fur seal (GFS). Locations that were pooled due to sample size limitations are labelled with an asterisk.