Table 1.

Sampling sites and number of adult and juvenile (in parentheses) gregaria s. str. and subrugosa ecotypes

Station	Latitude	Longitude	gregaria s. str. adults (juveniles)	subrugosa adults (juveniles)
			N mtDNA/N MSAT	N mtDNA/N MSAT
Falklands/Malvinas (FM)
12OT12	−52.110	−59.595	3/16 (0/0)	0/0 (0/0)
13OT13	−52.285	−59.546	4/12 (0/0)	0/0 (0/0)
15OT18	−52.391	−59.131	2/16 (0/0)	0/0 (0/0)
16OT19	−52.354	−58.592	2/16 (0/0)	0/0 (0/0)
17OT20	−52.359	−58.889	2/16a (0/0)	0/0 (0/0)
21OT16	−52.408	−59.976	2/16a (0/0)	0/0 (0/0)
12OT15	−52.189	−59.975	1/1 (0/0)	0/0 (0/0)
Total			16/93 (0/0)	0/0 (0/0)
Northern Chilean Patagonia (NCP)
Punta Metri	−41.595	−72.712	0/0 (4/7)	0/0 (0/0)
Huinay	−42.354	−72.463	3/3 (13/13)	0/0 (0/0)
Isla Dring	−46.442	−73.957	0/0 (7/7)	0/0 (0/0)
Punta Añihue	−43.793	−72.925	0/0 (4/16)	0/0 (0/0)
Islas Pajaros	−43.783	−72.997	0/0 (0/0)	0/0 (5/5)
Isla Lopez-mine	−50.361	−75.332	0/0 (4/7)	0/0 (0/0)
Isla Solaris	−51.330	−74.311	5/5 (0/0)	7/7 (0/0)
Total			8/8 (32/50)	7/7 (5/5)
Tierra del Fuego archipelago (TdF)
Punta Dungenes	−52.436	−68.568	0/0 (0/0)	1/1 (0/0)
Bahia Gregorio	−52.685	−70.142	5/10 (0/0)	0/0 (0/0)
Seno Otway	−52.918	−71.347	0/0 (0/0)	4/13 (0/0)
Silva Palma	−53.347	−71.800	0/0 (0/0)	0/0 (2/7)
Bahia Inutil	−53.556	−69.695	0/0 (0/0)	2/5 (0/0)
Bahia Nassau	−55.383	−69.450	0/0 (0/0)	1/1 (0/0)
Pt. Engaño	−54.929	−70.709	0/0 (0/0)	2/2 (0/0)
Bahia Virginia	−54.911	−67.726	0/0 (0/0)	8/12 (0/0)
Isla Picton	−55.174	−66.721	0/0 (0/0)	0/2 (0/0)
Isla Lennox	−55.393	−66.679	0/0 (0/0)	2/2 (0/0)
Total			5/10 (0/0)	20/38 (2/7)
Mar del Plata (MdP)
CCDB 2374	−38.003	−57.469	0/0 (0/0)	1/0 (0/0)
Grand total			29/111 (32/50)	28/45 (7/12)

N _mtDNA the number of specimens used with mitochondrial marker, N _MSAT the number of specimens used with microsatellites

^arefers to one specimen with missing genotype at a certain microsatellite locus