HOPE report

Number: 24-012

Studies on seasonal changes of daily activities and grouping patterns among wild bonobos.

Report: Sakamaki, Tetsuya

Date: 2012/5/26 - 2012/8/20

I conducted a field work at Wamba in the northern part of the Luo Scientific Reserve, one of the long-term study sites of wild bonobos, in DR Congo for two months. Two study groups, E1 and P group, are followed from a bed site in the morning to the next one on a daily basis. Observation time of E1 and P group was 132hr 34min over 12 days and 96h 10min over 11 days, respectively. I also followed another neighboring group, E2 group, for 5 days and observed bonobos totally for 45hr 16min. While following bonobos, I collected the data of my observation such as party composition, activities, and social interactions. I am analyzing the data to make it clear how bonobos change their grouping patterns and activities corresponding to the size of daily ranging association. After the field work in DR Congo, I went to Mexico to take part in the congress of the International Primatlogical Society that was held at Cancun between August 12 and 17. I presented the results of my recent study on immigrant female bonobos, which was financially supported by HOPE project in 2012.

Observing the bonobos on the trunk road

The congress of the International Primatlogical Society

HOPE Project<>