Dolphins 'call each other by name'

The research sheds new light on the intelligence of dolphins

Related Stories

Scientists have found further evidence that dolphins call each other by "name".

Research has revealed that the marine mammals use a unique whistle to identify each other.

A team from the University of St Andrews in Scotland found that when the animals hear their own call played back to them, they respond.

The study is published in the Proceedings of the National Academy of Sciences.

Dr Vincent Janik, from the university's Sea Mammal Research Unit, said: "(Dolphins) live in this three-dimensional environment, offshore without any kind of landmarks and they need to stay together as a group.

"These animals live in an environment where they need a very efficient system to stay in touch."

Signature whistles

It had been-long suspected that dolphins use distinctive whistles in much the same way that humans use names.

Previous research found that these calls were used frequently, and dolphins in the same groups were able to learn and copy the unusual sounds.

But this is the first time that the animals response to being addressed by their "name" has been studied.

Start Quote

Most of the time they can't see each other, they can't use smell underwater... and they also don't tend to hang out in one spot”

End Quote Dr Vincent Janik University of St Andrews

To investigate, researchers recorded a group of wild bottlenose dolphins, capturing each animal's signature sound.

They then played these calls back using underwater speakers.

"We played signature whistles of animals in the group, we also played other whistles in their repertoire and then signature whistles of different populations - animals they had never seen in their lives," explained Dr Janik.

The researchers found that individuals only responded to their own calls, by sounding their whistle back.

The team believes the dolphins are acting like humans: when they hear their name, they answer.

Dr Janik said this skill probably came about to help the animals to stick together in a group in their vast underwater habitat.

He said: "Most of the time they can't see each other, they can't use smell underwater, which is a very important sense in mammals for recognition, and they also don't tend to hang out in one spot, so they don't have nests or burrows that they return to."

The researchers believe this is the first time this has been seen in an animal, although other studies have suggested some species of parrot may use sounds to label others in their group.

Dr Janik said that understanding how this skill evolved in parallel in very different groups of animals could tell us more about how communication developed in humans.

More on This Story

Related Stories

The BBC is not responsible for the content of external Internet sites

More Science & Environment stories

RSS

Features & Analysis

BBC Future

(Thinkstock)

Can we turn a chicken into T-rex?

Plus more of the web’s best reads Read more...

Programmes

  • Cattle herded in AustraliaThe Travel Show Watch

    The spectacle of herding 2,000 cattle using bikes, cars and a helicopter

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.