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Elephants Show Flair For Arithmetic
Elephants Show Flair For Arithmetic
260 Views
posted on Thursday, September 04, 2008
ELEPHANTS SHOW FLAIR FOR ARITHMETIC
Times Online
September 2, 2008
Original Link
Under carefully controlled experimental conditions -- essentially comprising a large cage and two buckets of assorted fruit -- one elephant at Ueno Zoo in Tokyo managed to get its sums right 87 per cent of the time. A slightly less gifted pachyderm across the country in Kyoto scored a still respectable 69 per cent.
The curiously accurate adding skills of Elephas maximus have been discovered by Naoko Irie, a behavioural ecologist at the University of Tokyo putting the finishing touches to her doctoral thesis. In her tests, three apples were dropped into one bucket and five into a second one next to it. Two more apples were added to each bucket, leaving the first with five and the second with seven apples.
Unable to see inside the buckets or probe them with her trunk, 30-year old Ashiya selected the bucket with the more apples having, apparently, counted the contents of each as it was being loaded-up with fruit. Nothing spectacularly rare about that, say scientists -- plenty of animals have been shown to possess basic counting abilities but most animals fail when the numbers get much bigger than three or four or the margin of difference between the available choices become too narrow.
“I couldn’t believe it at first,” said Irie, “They could instantly compare numbers like six and five."
The elephants she subjected to the fruit-based arithmetic tests were as good at telling the difference between five and six as they were at spotting that five is greater than one, she said.
Speculation among scientists over why the elephant should have developed its limited but nonetheless impressive mathematical ability centres on the way in which the lumbering creatures move in herds. A basic counting ability, say experts, might act as a guarantee that no calf is left behind.
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NHNE Animal Research & Intelligence News Stories
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