HOME >> BIOLOGY >> NEWS
Use of stone hammers sheds light on geographic patterns of chimpanzee tool use

In a finding that challenges a long-held belief regarding the cultural spread of tool use among chimpanzees, researchers report that chimpanzees in the Ebo forest, Cameroon, use stone hammers to crack open hard-shelled nuts to access the nutrient-rich seeds. The findings are significant because this nut-cracking behavior was previously known only in a distant chimpanzee population in extreme western Africa and was thought to be restricted by geographical boundaries that prevented cultural spread of the technique from animal to animal. The findings, which involve the most endangered and least-understood subspecies of chimpanzee, are reported by Dr. Bethan Morgan and Ekwoge Abwe of the Zoological Society of San Diego's Conservation and Research for Endangered Species (CRES) and appear in the August 22nd issue of the journal Current Biology, published by Cell Press.

Prior to this discovery, it was thought that chimpanzee nut-cracking behavior was confined to the region west of the N'Zo-Sassandra River in Cote d'Ivoire. Because there are no relevant ecological or genetic differences between populations on either side of this "information barrier," explain the researchers of the new study, the implication had been that nut-cracking is a behavioral tradition constrained in its spread by a physical barrier: It was absent to the east of the river because it had not been invented there. The new finding that chimpanzees crack open nuts more than 1700 km east of the supposed barrier challenges this long-accepted model. According to the authors of the study, the discontinuous distribution of the nut-cracking behavior may indicate that the original "culture zone" was larger, and nut-cracking behavior has become extinct between the N'Zo-Sassandra and Ebo. Alternatively, it may indicate that nut-cracking has been invented on more than one occasion in widely separated populations.

This is one of the first reports of tool use for Pan troglodytes vellerosus, th
'"/>

Contact: Heidi Hardman
hhardman@cell.com
617-397-2879
Cell Press
21-Aug-2006


Page: 1 2

Related biology news :

1. Surprising new species of light-harvesting bacterium discovered in Yellowstone
2. Innovative research technique reveals another natural wonder in Yellowstone Park
3. Presence of wolves allows aspen recovery in Yellowstone
4. Research team discovers gallstone gene
5. Stowers Institutes Workman Lab demonstrates mechanism for decoding histone modification marks
6. Gladstones Deepak Srivastava receives E. Mead Johnson Award for achievement in pediatrics
7. Linking DNA and histone methylation
8. New edition of touchstone microbiology reference book now available
9. Gladstone scientists identify critical gene factor in heart development
10. The chimpanzee stone age
11. Dinosaurs -- stones did not help with digestion

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/12/2018)... ... September 12, 2018 , ... JoVE, the leading producer and ... the professional development of academic librarians by sponsoring four award-winners to attend the ... to submit successful strategies to increase collaboration among librarians and STEM faculty and ...
(Date:9/7/2018)... COLLEGE STATION, Texas (PRWEB) , ... September 05, ... ... iCON Turnkey Facility Platform for a mAb manufacturing facility late last year, IPS-Integrated ... ÜBERcellFLEX PODs for the manufacturing of autologous cell therapies. The iCON solution provides ...
(Date:9/7/2018)... (PRWEB) , ... September 06, 2018 , ... ... Amedica Corporation (NASDAQ: AMDA) to purchase its commercial spine business, which includes its ... directly related to the spine that result from it. The deal will make ...
Breaking Biology News(10 mins):
(Date:8/29/2018)... , ... August 28, 2018 , ... ... retailer of contact lenses, has been ranked in 1138th place on the 27th ... companies. , The list represents the most successful companies within the American ...
(Date:8/26/2018)... ... August 23, 2018 , ... LabRoots , the ... around the world, will host the 4th Annual Microbiology and Immunology Virtual Event ... disciplines, encompassing various research areas including medicine, agriculture, and space. , During ...
(Date:8/21/2018)... ... August 21, 2018 , ... ... medical device compliance and commercialization, has just released a new paper discussing ... presented by Dr. Mario Kossmann, ESEP at the 28th Annual INCOSE International ...
(Date:8/17/2018)... ... August 16, 2018 , ... ... results from the AmbryShare project were published today in JAMA Oncology, identifying new ... exome study ever conducted. , Every year hereditary breast cancer affects more than ...
Breaking Biology Technology:
Cached News: