Bonobo apes help strangers


This video says about itself:

Susan Savage-Rumbaugh – The gentle genius of Bonobos. TED talks

7 April 2014

Savage-Rumbaugh’s work with bonobo apes, which can understand spoken language and learn tasks by watching, forces the audience to rethink how much of what a species can do is determined by biology — and how much by cultural exposure.

From Duke University in the USA:

Bonobos help strangers without being asked

Humans aren’t the only species eager to make a good first impression

November 7, 2017

Summary: The impulse to be kind to strangers was long thought to be unique to humans, but research on bonobos suggests our species is not as exceptional in this regard as we like to think. Famously friendly apes from Africa’s Congo Basin, bonobos will go out of their way to help a stranger get food even when there is no immediate payback, researchers show. What’s more, they help spontaneously, without having to be asked first.

A passer-by drops something and you spring to pick it up. Or maybe you hold the door for someone behind you. Such acts of kindness to strangers were long thought to be unique to humans, but recent research on bonobos suggests our species is not as exceptional in this regard as we like to think.

Famously friendly apes from Africa’s Congo Basin, bonobos will go out of their way to help strangers too, said Jingzhi Tan, a postdoctoral associate in evolutionary anthropology at Duke University.

A previous study by Tan and associate professor of evolutionary anthropology Brian Hare found that bonobos share food with strangers. Now, in a new series of experiments, the team is trying to find out just how far this kindness goes.

The researchers studied wild-born bonobos at the Lola ya Bonobo sanctuary in the Democratic Republic of Congo.

In one experiment, they found that bonobos will help a stranger get food even when there is no immediate payback.

Sixteen bonobos were led one at a time into one of two adjacent rooms separated by a fence. The researchers hung a piece of apple from a rope just above the empty room, visible but out of reach.

The apes couldn’t access the fruit or the rope. But if they climbed the fence they could reach a wooden pin holding the rope to the ceiling and release the dangling fruit, causing it to drop within reach of any bonobo that entered the next room.

The bonobos released the fruit roughly four times more often when an unfamiliar bonobo was in the adjacent room than when the room was empty.

What’s more, the bonobos didn’t wait to be asked for help, they just offered it. The researchers changed the size of the mesh surrounding the stranger’s room so that in some trials they were able to stick their arms through the openings in the screen to beg for the treat, and in other trials they were not. The bonobos helped just as often whether the stranger gestured for help or not.

Bonobos’ impulse to feel for strangers isn’t entirely under conscious control, the researchers also found. In another experiment, they had 21 bonobos watch a series of short videos. In some videos, the apes saw a familiar group member either yawning or making a neutral expression. In other videos they watched complete strangers from the Columbus Zoo in the U.S. behaving the same way.

Just as watching another person yawn can make you yawn, yawning is contagious in bonobos too. Previous studies suggest the phenomenon is linked to a basic form of empathy called “emotional contagion,” when one person’s mood triggers similar emotions in others around them.

The researchers found that stranger yawns were just as contagious as those of groupmates.

The impulse to be nice to strangers is likely to evolve in species where the benefits of bonding with outsiders outweigh the costs, said Tan, now a postdoctoral scholar at the University California, San Diego.

Female bonobos leave the group where they were born to join a new group when they reach adulthood, where they form bonds with other unrelated adults they’ve never met. Bonobos, like humans, may simply be eager to make a good first impression.

“All relationships start between two strangers,” Tan said. “You meet a stranger, but you may meet them again, and this individual could become your future friend or ally. You want to be nice to someone who’s going to be important for you.”

The results were published Nov. 7 in the journal Scientific Reports. This research was supported by the National Science Foundation (NSF-BCS-27552-02, NSF-BCS-10-25172).

By the age of three months, human babies can already follow Mr. Rogers’ advice to ‘look for the helpers.’ In fact, human infants naturally show a strong preference for individuals who help rather than hinder others. Now, a study finds that the same cannot be said of bonobos. While bonobos are similarly adept in discriminating helpers from hinderers, they show the opposite bias, consistently favoring hinderers over helpers: here.

Bonobos are willing to share meat with animals outside their own family groups. This behavior was observed in the Democratic Republic of the Congo and is documented in a new study: here.

5 thoughts on “Bonobo apes help strangers

  1. Pingback: Bonobos, chimpanzees understand each other’s gestures | Dear Kitty. Some blog

  2. Pingback: Hurricane Harvey disaster and ants in Texas | Dear Kitty. Some blog

  3. Pingback: Apes have ‘human’ muscles too | Dear Kitty. Some blog

  4. Pingback: How wild apes react to camera traps | Dear Kitty. Some blog

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