http://www.wired.com/wiredscience/2013/0...-whistles/
Quote:For decades, scientists have been fascinated by dolphins’ so-called signature whistles: distinctive vocal patterns learned early and used throughout life. The purpose of these whistles is a matter of debate, but new research shows that dolphins respond selectively to recorded versions of their personal signatures, much as a person might react to someone calling their name.
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Gero is especially interested in the different ways that dolphins responded to hearing their signature called. Sometimes they simply repeated their signature — a bit, perhaps, like hearing your name called and shouting back, “Yes, I’m here!” Some dolphins, however, followed their signatures with a long string of other whistles.
“It opens the door to syntax, to how and when it’s ‘appropriate’ to address one another,” said Gero, who wonders if the different response types might be related to social roles or status. Referring to each other by name suggests that dolphins may recall past experiences with other individual dolphins, Gero said.
