Push and pull factors driving movement in a social mammal: context dependent behavioural plasticity at the landscape scale

Journal article

Understanding how key parameters (e.g. density, range-size and configuration) can affect animal movement remains a major goal of population ecology. This is particularly important for wildlife disease hosts, such as the European badger (Meles meles), a reservoir of Mycobacterium bovis. Here we show how movements of 463 individuals among 223 inferred group territories across 755 km2 in Ireland were affected by sex, age, past-movement history, group-composition, and group-size index from 2009 to 2012. Females exhibited a greater probability of moving into groups with a male-biased composition, but male movements into groups were not associated with group composition. Male badgers were, however, more likely to make visits into territories than females. Animals that had immigrated into a territory previously were more likely to emigrate in the future. Animals exhibiting such ‘itinerant’ movement patterns were more likely to belong to younger age-classes. Inter-territorial movement propensity was negatively associated with group-size, indicating that larger groups were more stable and less attractive (or permeable) to immigrants. Across the landscape, there was substantial variation in inferred territory-size and movement dynamics, which was related to group-size. This represents behavioural plasticity previously only reported at the scale of the species’ biogeographical range. Our results highlight how a “one-size-fits-all” explanation of badger movement is likely to fail under varying ecological contexts and scales, with implications for bovine tuberculosis management

Authors: Byrne, A; O'Keeffe, J; Buesching, C; Newman, C

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Oxford University Press
• Journal: Current Zoology
• Volume: 65
• Issue: 5
• Pages: 517–525
• Publication date: 2018-11-28
• Acceptance date: 2018-10-26
• DOI: 10.1093/cz/zoy081
• EISSN: 2396-9814
• ISSN: 1674-5507
• Keywords: perturbation; territoriality; bTB; dispersal; meles meles; social groups; wildlife disease; wildlife biology; socio-biology