Pilot studies for stock enhancement of purple sea urchins (Paracentrotus lividus, Lamarck, 1816): usefulness of refuges and calcein marking for the monitoring of juveniles released into the natural environment - Correia, MJ; Mega Lopes, P; Santos, PM; Jacinto, D; Mateus, D; Maresca, F; Quintella, B; Cruz, T; Sílvia, L; Pombo, A; Costa, JL (2023)