Angela Landolfi, Consiglio Nazionale delle Ricerche - Istituto di Scienze Marine (CNR - ISMAR), Roma, Italy, Davide Cavaliere, CNR ISMAR, Rome, Italy, Federico Falcini, Institute of Marine Sciences (ISMAR), National Research Council (CNR), Rome, Italy and Alexandre Mignot, Mercator Océan International, Toulouse, France