[1] Univ Genoa, Dip Te Ris, Genoa, Italy
[2] CNR ISMAR, La Spezia, Italy
[3] Area Marina Protetta Portofino, Portofino, Italy
[4] Univ Ancona, Ancona, Italy
[5] Univ Pisa, Dipartimento Biol, Pisa, Italy
[6] ENEA, Santa Teresa, La Spezia, Italy
[7] Reg Liguria, Genoa, Italy
[8] CNR ISMAR, Genoa, Italy
[9] Ist Nazl Geofis & Vulcanol, La Spezia, Italy
[10] Univ Genoa, Dipartimento Biol, Genoa, Italy
[11] ISPRA, Rome, Italy