It's the first time such culinary behavior has ever been witnessed in a nonhuman species.
By Bryan Nelson
Fri, Dec 25 2009 at 5:39 AM EST
If proper table etiquette is what separates civilized society from the savages, then the boundaries of civilization just got a whole lot wider. For the first time, chimpanzees in Africa's Nimba Mountains have been observed using tools to chop up their food into bite-sized, more manageable portions. Even more interesting: these table manners appear to have been passed from generation to generation.
The chimps use stone and wooden cleavers, as well as stone anvils to process Treculia fruits — hard, fibrous volleyball-sized fruits which can weigh up to 8.5 kilograms.
But the apes are not simply cracking into the Treculia to get to otherwise unobtainable food, say researchers. Neighboring chimpanzee populations also eat the fruits but don't process their food this way. Rather, these chimps are actively chopping up the food into more manageable portions simply to make the experience of eating it more pleasant and convenient.
The discovery was made by primate reserachers Kathelijne Koops, William McGrew and Tetsuro Matsuzawa during a monthly survey of chimps (Pan troglodytes) living in the mountain forests of Guinea. It began when Koops found the cleavers and anvils, left behind by a troop of chimps that had been eating the large fruits.
more:
http://www.mnn.com/lifestyle/pets-animals/stories/wild-chimps-fashion-cutlery-chop-food-into-bite-sized-portions