Figure 1: Map of the study area detailing sampling localions at La Palma Island: 1 Tazacorte (Acuipalma S.L. farm); 2 El Remo (marine reserve); 3 La Salemera; 4 Santa Cruz de la Palma; 5 Puerto Talavera; 6 Puntagorda; and Gran Canaria Island: 7 Melenara (ADSA S.L. and Canexmar S.L. farms); 8Arinaga; 9 Castillo del Romeral (ADSA S.L. and Playa Vargas S.L. farms); 10 (San Cristobal).