Table 2. Pairwise F_ST values for microsatellites of Cory´s shearwaters (above diagonal) and distances in km (below diagonal) from 11 breeding localities in the Atlantic and the western Mediterranean.

	Atlantic								Mediterranean
	Cíes	Sisargas	Coelleira	Berlenga	Azores	Canarias	Selvagens	Desertas	Pantaleu	Aire	Habibas
Cíes	-	0.017	0.022	0.023	0.024	0.026	0.149	0.184	0.247	0.071	0.017
Sisargas	158	-	0.034	0.028	0.026	0.029	0.151	0.181	0.241	0.085	0.024
Coelleira	270	115	-	0.029	0.016	0.032	0.158	0.195	0.245	0.063	0.025
Berlenga	318	460	580	-	0.034	0.029	0.121	0.169	0.198	0.077	0.023
Azores	1515	1550	1680	1425	-	0.027	0.145	0.183	0.230	0.055	0.028
Canarias	1670	1795	1925	1400	1390	-	0.150	0.220	0.246	0.086	0.031
Selvagens	1470	1590	1735	1180	1235	210	-	0.119	0.027	0.133	0.147
Desertas	1260	1375	1510	1000	1021	475	280	-	0.141	0.191	0.186
Pantaleu	1770	1940	2040	1435	2640	2150	1995	1950	-	0.198	0.231
Aire	1915	2090	2180	1520	2785	2300	2150	2060	186	-	0.070
Habibas	1340	1500	1604	935	2200	1700	1960	1480	520	655	-

Statistically significant F_ST values after Bonferroni correction (P<0.005) are shown in bold. Newly founded populations (Cíes, Sisargas and Coelleira) are shown for comparison as they have a structure that likely reflects the sources of founding individuals. The vertical line separates Atlantic and Mediterranean colonies.