Dear all, I am volunteering in a french association working on marine mammal conservation. As part of one of the project we are leading on the bottlenose dolphin in the Mediterranean, I am collecting informations about past and current studies/projects/monitoring carried out on the bottlenose dolphin using passive acoustic. I am particularly interested in monitoring implemented in MPAs on the long-term. Info on the type of hydrophone used, mooring system, advantages and drawbacks associated are of interest to me. Thank you for your consideration, Cheers, Julie Jourdan Groupement d'Interet Scientifique pour les Mammifères Marins de Méditerranée (GIS3M)