ABS 2022
Relative Impacts of Four Spatial Scales of Movement on Social Grooming Networks in Vampire Bats
C. Raven A. Hartman, Gerald G. Carter. Ohio State University, Columbus, Ohio, United States

Social networks are typically created from associations at one particular spatial scale (e.g. roost sharing), such that associations at finer-grained scales (e.g. within roosts) are not observed in the network. A clear understanding social network structure therefore requires identifying the relative importance of different spatial scales of association, which then determine and constrain rates of social interaction, like allogrooming. Here, we use social data from wild and captive vampire bats to determine how grooming networks are shaped by the relative role of movement at four spatial scales: (1) switching roosts (2) switching crevices, (3) switching clusters, and (4) switching grooming partners. At each scale, we measure the empirical distribution of movement rates. We then incorporate all four movements simultaneously into agent-based simulations of virtual bats moving and interacting in a realistic fashion, with each simulation creating a possible grooming network. Finally, we use linear models to determine how a bat’s grooming network centrality (degree, strength, eigenvector) is affected by each type of movement.