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

Open Access

Fig. 1

Artificial shelters used as acclimatization and protection structures for the release of sea urchins Paracentrotus lividus. (a) detail of the fixation mechanism; (b) overview of the structures in a tide pool; (c) sea urchins inside structures, fluorescent marks indicated by the black arrows.

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