Photographs taken after a keeper accidentally left a knife in the zoo’s gorilla enclosure appear to tell a menacing story. One shows a gorilla, named Barika, clutching the blade in her black, hairy hand, seemingly pointing the sharp end at an unsuspecting troop mate sitting nearby.
But zoo officials say the primates don’t understand the idea of using weapons and were never in any real danger.
A keeper carried the paring knife into the enclosure to help prepare food for the gorillas, said Cathy Gaviller, the zoo’s director of conservation, education and research.
He stuck the blade in his pocket, but it slid out unnoticed and was left behind.
Soon, a curious Barika stumbled across the shiny object and picked it up by the handle.
That’s when Joe and Heike Scheffler, who were standing outside the enclosure with about 20 people, including several children, noticed it glinting.
“In the first moment, I thought it might be a (toy),” said Joe Scheffler, adding people began pointing and murmuring as they caught sight of the blade.
“I though maybe it’s out of rubber, but I thought no, it’s … a knife, you can see the steel, you see it’s really bright and there’s no rust.”
“You see that it’s a knife, but you think it’s not possible there’s a knife inside.”
Scheffler’s wife snapped photographs as Barika carried the knife around, holding it near another female gorilla, named Zuri.
Within minutes of picking the blade up, Barika placed it on a chair and all of the gorillas were called out of the enclosure by keepers, Gaviller said.
The zoo actually has a system in place to retrieve lost items that have slipped into the enclosure.
“The public members quite often drop cameras or sunglasses or hats or water bottles, by accident, into the exhibit,” Gaviller said. “So this … is actually a fairly common procedure.”
The primates will often pick up new items in their enclosure out of curiosity, but they quickly get bored if they can’t eat the objects or figure out a use for them, she said.
While gorillas will use crude tools in captivity, they have no concept of using weapons and would never have thought to be violent with the knife, Gaviller said, adding any aggression seen in the photographs is entirely in the eye of the beholder.
“Gorillas are very passive, non-aggressive, shy-temperament creatures, and certainly the idea of a tool to hurt another gorilla is entirely foreign to their behaviour,” she said.
It’s zoo policy for keepers to count tools and equipment going in and coming out of exhibits.
“Clearly this was an oversight by a very dedicated professional, a very experienced keeper,” said Gaviller.
“We will be reviewing those procedures will all the staff, just to ensure this doesn’t happen again.”
This is not the first public issue the zoo has had to deal with related to its animals.
Zoocheck Canada has called for an investigation after several high-profile deaths of animals at the zoo. Forty-one stingrays died in their tank last year and a Turkmenian markhor strangled to death on a rope in its enclosure in January.
The zoo has countered that it passed a very stringent accreditation inspection from the Canadian Association of Zoos and Aquariums in September.
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As science experiments go, it was real hoot.
Researchers mapping the evolution of laughter gently tickled the feet, palms, necks and armpits of baby humans and apes.
By analysing the sounds the animals made – giggles, hoots, grunts and pants – they concluded that laughter can be traced back some 16million years, and that it evolved along the same pathway as our evolution.
In the first study of its kind, Portsmouth University researchers tickled three human babies and young orangutans, gorillas, chimps and bonobos and recorded their ‘laughter’.
They then teased apart the different sounds in the recordings and mapped the similarities between animals. The result looked like the evolutionary family tree, in which humans are most closely related to chimps and bonobos and most distanced from orangutans.
And it showed that laughter evolved gradually over the last 10million to 16million years, reports the journal Current Biology.
Primatologist Dr Davila Ross said: ‘Our results on laughter indicate its pre-human basis.
‘This is important for emotional research in humans and animals as well as for the management of primates in captivity and in the wild.’
The analysis also revealed that gorillas and bonobos have some control over their breathing – a skill that was thought to be unique to humans and to have played an important role in the evolution of speech.
Dr Ross said that apes use laughter differently to humans, adding: ‘Although we can use it to mock each other, previous research has indicated it developed in our ancestors as a play tool.
‘Apes like to play with each other and sometimes this can get out of hand so their form of laughter is used to prevent them getting over aggressive.’Â
Jaak Panksepp, a scientist from Washington State University in the U.S. who studies laughter-like responses in animals, said the findings were exciting.
His work has suggested that even rats ‘laugh’ in response to play and tickling – producing chirps too high-pitched for people to hear.
Other studies have shown that young chimps can outperform people in memory games, completing them more quickly and with fewer mistakes.
Scientists have also observed chimpanzees making a ‘toolbox’ of items when foraging for food and gorillas using branches to test the depth of water they plan to wade through.