Artisanal Harvest of Shellfish in the Northeastern Atlantic: The Example of Limpet and Topshell Fisheries in the Archipelago of Madeira

*Ricardo Sousa, Rodrigo Riera, Joana Vasconcelos, Lídia Gouveia, Ana Rita Pinto, João Delgado, Adriana Alves, José A. González, Mafalda Freitas and Paulo Henriques*
