Seminar series
Date
Tue, 27 Jan 2026
14:00
14:00
Location
C3
Speaker
Gesine Reinert
Organisation
Department of Statistics, University of Oxford
This work is based on 30 years of behavioural observations of the largest-known group of wild chimpanzees. The data includes 10 different proximity and interaction levels between chimpanzees. There is an abrupt transition from cohesion to polarization in 2015 and the emergence of two distinct groups by 2018.
First we combine the data into a time series of a single weighted network per time stamps. Then we identify groups of individuals that stay related for a significant length of time. We detect cliques in the animal social network time series which match qualitative observations by chimpanzee experts. Finally we introduce a simple model to explain the split.
This is based on joint work with Mihai Cucuringu, Yixuan He, John Mitani, Aaron Sandel, and David Wipf.