Bonobo squeaks and speech evolution

Early evolution of key ability

The accumulation of small heritable changes within populations over time.

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Bonobo squeaks and speech evolution

#1  Postby zoon » Aug 05, 2015 8:41 am

BBC article here, original paper published yesterday here.

The BBC wrote:
Wild bonobos use a single high-pitched call in a variety of contexts, showing a flexibility in their communication that was thought to be uniquely human.
That is the conclusion of a study by UK and Swiss psychologists.
Bonobos are just as closely related to humans as chimpanzees, but their wild communication is much less studied.
Researchers say the new findings push back the development of context-free vocal calls to our shared ancestor with bonobos, 6-10 million years ago.

For a long time, it was assumed that non-human primates, including great apes like chimpanzees and bonobos, could only communicate using calls that were tied to specific emotional states - such as screaming in alarm, or barking for aggression.
Using a single vocal signal in multiple contexts - referred to as "functional flexibility" - was thought to be a human ability. And it is something we develop very early.
Babies as young as 3-4 months, for example, have been shown to use squeals and growls across a wide range of situations, whether they are happy, distressed or neutral. These sit alongside other noises that are obviously tied to particular emotions, such as crying and laughing.
Dr Zanna Clay from the University of Birmingham noticed a similar phenomenon among the bonobos she was studying in the Democratic Republic of Congo.
As well as the usual screams, barks, pants and grunts, she heard a particular squeaking sound or "peep" being used all over the place.

Continued here.
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Re: Bonobo squeaks and speech evolution

#2  Postby DavidMcC » Aug 12, 2015 6:10 pm

zoon wrote:BBC article here, original paper published yesterday here.

The BBC wrote:
...
Bonobos are just as closely related to humans as chimpanzees, but their wild communication is much less studied.
...

I wonder if they really mean "Bonobos are just as closely related to humans as ARE chimpanzees". It doesn't necessrily mean the same thing, but my interpretation is a well established fact.

Aside from that, it is also well established that chimpanzees make extensive use of vocal calls in conjunction with gestures to get their message across. No doubt, bonobos do something similar.

EDIT: Sloppy wording like the above is often a problem in science journalism.
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Re: Bonobo squeaks and speech evolution

#3  Postby Briton » Aug 13, 2015 8:00 am

DavidMcC wrote:
zoon wrote:BBC article here, original paper published yesterday here.

The BBC wrote:
...
Bonobos are just as closely related to humans as chimpanzees, but their wild communication is much less studied.
...

I wonder if they really mean "Bonobos are just as closely related to humans as ARE chimpanzees". It doesn't necessrily mean the same thing, but my interpretation is a well established fact.

Aside from that, it is also well established that chimpanzees make extensive use of vocal calls in conjunction with gestures to get their message across. No doubt, bonobos do something similar.

EDIT: Sloppy wording like the above is often a problem in science journalism.


Is that statement "Bonobos are just as closely related to humans as chimpanzees" scientifically incorrect?
Adding 'are' doesn't make sense unless you changed it to "Bonobos are closely related to humans, as are chimpanzees".
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Re: Bonobo squeaks and speech evolution

#4  Postby Veida » Aug 13, 2015 8:48 am

It's unclear.

It could be read to contradict the fact that bonobos and chimpanzees are more closely related to each other than they are to humans.
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Re: Bonobo squeaks and speech evolution

#5  Postby DavidMcC » Aug 14, 2015 2:10 pm

Briton wrote:
DavidMcC wrote:
zoon wrote:BBC article here, original paper published yesterday here.

The BBC wrote:
...
Bonobos are just as closely related to humans as chimpanzees, but their wild communication is much less studied.
...

I wonder if they really mean "Bonobos are just as closely related to humans as ARE chimpanzees". It doesn't necessrily mean the same thing, but my interpretation is a well established fact.

Aside from that, it is also well established that chimpanzees make extensive use of vocal calls in conjunction with gestures to get their message across. No doubt, bonobos do something similar.

EDIT: Sloppy wording like the above is often a problem in science journalism.


Is that statement "Bonobos are just as closely related to humans as chimpanzees" scientifically incorrect?
Adding 'are' doesn't make sense unless you changed it to "Bonobos are closely related to humans, as are chimpanzees".

I disagree, Briton. My version is unambiguous, but the original could have meant that "bonobos are just as closely related to humans as they are to chimpanzees.", which is certainly not what they meant to say.
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