Fig. 1

Map illustrating the Madeira Archipelago with the location of the four study sites: a Marina da Calheta; b Marina do Funchal; c Marina da Quinta do Lorde and d Marina do Porto Santo

Map illustrating the Madeira Archipelago with the location of the four study sites: a Marina da Calheta; b Marina do Funchal; c Marina da Quinta do Lorde and d Marina do Porto Santo