GME data sets.zip

We used nest data collected with the standing-crop nest count method, which consists of documenting all nests that are observed from line transects, and measuring the perpendicular distance from the nest to the transect line. We only included nests classified according to the age categories defined by Plumptre and Reynolds (1997), in which the longevity of nests is considered until the decomposition of leaves (Stewart et al. 2011, Zamma and Makelele 2012). We used data from nest surveys conducted between 2010 and 2019, except 2016 when no surveys were conducted, using line transect distance sampling.Survey design followed one of three different approaches. In Mahalne Mountains National Park, we followed a systematic random design (102 transects in 13 sites, length 0.4-1.0 km). In the Masito-Ugalla Ecosystem, we walked line transects (61 transects in 12 sites, length 0.9-7.3 km) that originated from a central point and followed cardinal directions. Finally, where chimpanzees were known to be present, we established parallel transects (139 transects in 16 sites, length 0.9-7.0 km), following a randomly selected bearing, and spaced at 0.5 km across the area. We split all transects into segments based on the shortest transect length (0.4 km) using the dshm package version 0.1.0 in R. For more details see Carvalho et al. 2022, Ecological Applications.