Chimpanzee cultures

  • July 21, 2015
Chimpanzee cultures

Research provides new evidence of cultural diversification between neighbouring chimpanzee communities

“Given the close evolutionary relationship between chimpanzees and humans, insights into what drives cultural diversification in our closest living relatives will in turn shed light on how cultural differences emerge and are maintained between adjacent groups in human societies.”

Kathelijne Koops

For centuries it has been thought that culture is what distinguishes humans from other animals, but over the past decade this idea has been repeatedly called into question. Cultural variation has been identified in a growing number of species in recent years, ranging from primates to cetaceans. Chimpanzees, our closest living relatives, show the most diverse cultures aside from humans, most notably, in their use of a wide variety of tools.

The method traditionally used to establish the presence of culture in wild animals compares behavioural variation across populations and excludes all behavioural patterns that can be explained by genetic or environmental differences across sites. Nevertheless, it is impossible to conclusively rule out the influence of genetics and environmental conditions in geographically distant populations.

To circumnavigate this problem, researchers, led by Dr Kathelijne Koops [2006], took a new approach. “We compared neighbouring chimpanzee groups living under similar environmental conditions, which allows for the investigation of fine scale cultural differences, whilst keeping genetics constant,” said Koops.

She and colleagues from Kyoto University and Freie Universität Berlin compared the length of tools used for ‘ant-dipping’ between two neighbouring chimpanzee communities, M-group and S-group, in the Kalinzu Forest, Uganda. Dipping for army ants is one of the hallmark examples of culture in chimpanzees and involves the use of a stick to extract the highly aggressive army ants from their underground nests.

Previous research has shown that ant-dipping tool length varied across chimpanzee study sites in relation to the army ant species (Dorylus spp.) that were present. So Koops compared the availability of the different species of army ants and the length of dipping tools used in the two adjacent chimpanzee communities.

The researchers found that M-group tools were significantly longer than S-group tools, despite identical army ant species availability. Considering the lack of ecological differences between the two communities, the tool length difference was concluded to be cultural. “Our findings highlight how cultural knowledge can generate small-scale cultural diversification in neighbouring groups,” said Koops.

“Given the close evolutionary relationship between chimpanzees and humans, insights into what drives cultural diversification in our closest living relatives will in turn shed light on how cultural differences emerge and are maintained between adjacent groups in human societies,” said Koops, who conducted the work at Cambridge University’s Division of Biological Anthropology and at Zurich University’s Anthropological Institute and Museum.

The research is published today in the Nature journal Scientific Reports.

*Picture credit: Kathelijne Koops. 

Latest News

How might extreme heat contribute to human migration?

Rising temperatures due to climate change are likely influencing human migration patterns, according to a new study co-authored by Gates Cambridge Scholar Dr Kim van Daalen [2018]. The study, led by Rita Issa of University College London, is published today in the open-access journal PLOS Climate. It looks at the role of heat in human […]

Scholar scoops prestigious science innovation fellowship

Freja Ekman has been named one of the 2023 class of Hertz Fellows as the prestigious fellowship celebrates its 60th year. The 15 fellowships in applied science, engineering and mathematics are awarded by Fannie and John Hertz Foundation, a non-profit organisation for innovators in science and technology. Winners will have their graduate studies funded for […]

Scholar hosts first UN communications technology access meeting in India

Gates Cambridge Scholar Pradipta Biswas has hosted a UN meeting on improving access to communications technology – the first ever held in India. The meeting of ITU-T Study Group 9 (SG-9) on “Broadband Cable and Television/Audiovisual content transmission and integrated broadband cable networks”  was held in May at the Indian Institute of Science in Bengaluru […]

The role of storytelling in addressing colonial trauma

When she was growing up, Briseyda Barrientos Ariza [2023] spent her childhood summers in rural Guatemala, visiting her grandparents. In the evenings she would listen to her grandfather, a man who couldn’t read or write, tell intricate stories about his and others’ encounters with female folkloric figures. Two stood out in particular: La Llorona and […]