Acoustic Behavior in a Local Population of Bottlenose Dolphins

Abstract

Groups of bottlenose dolphins are a common sight in the Sado estuary, near Lisbon, Portugal. They make up a small resident population of about 40 animals, usually divided in groups of about 15, that move in and out of the estuary. They exploit the faunal riches upstream and also engage in frequent excursions to sea, covering distances yet unknown but following, as far as we can tell, routes close to shore.