Figure 4: The social dynamics of the GNG-breeding band of the WRT-troop.

Each horizontal bar represents the social history of a single OMU in the GNG-breeding from 2001–2013; Capital letters on the left represent the codes of the OMU. The thicknesses of the bars are proportional to the number of adults in the OMU. The light blue stripes are OMUs that existed in the GNG-breeding band when we began observations in 2001. The green bars indicate the OMUs in which the resident male was replaced but otherwise the composition of the harem (we define harem as the set of adult females residing in an OMU) remained the same. The dark grey bars represent OMUs that immigrated into the band. The dark pink bars represent OMUs that increased in size as a result of resident females and their offspring transferring into this OMU; the dark blue bars represent OMUs that were formed when a bachelor male attracted several sub-adult females to form a harem; black-dashed arrows indicate that a single female transferred between harems. Yellow arrows indicate that several members of a harem transferred into a new harem. Purple arrows signify that an entire harem transferred to a new leader male. Red arrows represent those cases in which an entire harem was taken over by a new leader male. Solid-line Black arrows represent male transfer within the band.