Map of the Western Mediterranean showing the three study regions and corresponding sites.

<p>In Catalonia: Montgó (Mon: 42°6.2′N; 3°10.1′E), Isla Pedrosa (Ped: 42°4.2′N; 3°12.1′E), Giverola (Giv: 41°44.1′N; 2°57.1′E), and Fenals (Fen: 41°41.3′N; 2°49.6′E); in Sardinia: Torre Bollo (Boll: 40°34.1′N; 8°9.5′E), Bombarde (Bom: 40°34.5′N; 8°15.4′E), Pepino (Pep: 40°32.2′N; 8°19.3′E), and Sperança (Spe: 40°29.4′N; 8°21.6′E); and in Majorca: Còlonia (Col: 39°18.5′N; 2°59.2′E), Estanyol (Est: 39°21.2′N; 2°54.6′E), St. Elm (Tel: 39°34.5′N; 2°20.5′E), and Cala Llamp (Lla: 39°31.5′N; 2°23.2′E).