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Only known chimp war reveals how societies splinter

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   Četvrtak, 15 Svibanj 2014 00:00

Jane Goodall has been studying the chimpanzees of Gombe for over 50 years. During the early 1970s the group appeared to split in two, and friendliness was replaced by fighting. So extreme and sustained was the aggression that Goodall dubbed it a war. Joseph Feldblum at Duke University in Durham, North Carolina, and colleagues have re-examined Goodall's field notes from the chimp feeding station she established at Gombe to work out what led to the conflict.
In the past, researchers have estimated the strength of social ties based on the amount of time two chimps spent together at the station. But the notes are so detailed that Feldblum could get a better idea of each chimp's social ties, for instance, by considering if the chimps arrived at the same time and from the same direction.
His team then plugged this data into software that can describe the chimps' social network. They did this for several periods between 1968 and 1972, revealing when the nature of the network changed.

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