Individual study: Evaluating the effects of protection on Paracentrotus lividus distribution in two contrasting habitats
Ceccherelli G., Pinna S. & Sechi N. (2009) Evaluating the effects of protection on Paracentrotus lividus distribution in two contrasting habitats. Estuarine, Coastal and Shelf Science, 81, 59-64
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Designate a Marine Protected Area with a zonation system of activity restrictions
A site comparison study in 2006 of seven sites in a seagrass and rocky seabed area in the Mediterranean Sea, Sardinia, Italy (Ceccherelli et al. 2009) found that the effect of designating a marine protected area with a zonation system on purple sea urchin Paracentrotus lividus abundance and size varied with the level of restriction in place. Within the protected area after four years, fully protected no-take sites had similar abundances of urchin (2–5 individuals) compared to partially protected sites where some restricted urchin harvest occurred (1–12 individuals), and to unprotected fished sites outside the protected area (2–12 individuals). However, urchins were larger in no-take sites (57–62 mm), compared to partially protected (32–61 mm) and unprotected fished sites (24–50 mm). Capo Caccia–Isola Piana marine protected area was established in 2002 with varying levels of protection including a no-take zone and a partially protected zone where urchin harvest was formerly prohibited but reopened with restrictions in 2006 (see paper for details). Sampling took place in April–May 2006 after the harvest season at seven sites (200 m2 each) in 6–10 m water depth: one within the no-take zone, three within the partially protected zone, and three outside the marine protected area. At each site, urchins were counted inside 20 quadrats (1 × 1 m), and 20 urchins were measured (diameter without spines).
(Summarised by Anaëlle Lemasson & Laura Pettit)