Study Species and Site
This study was conducted on a population of wild Rwenzori Angolan colobus monkeys (Colobus angolensis ruwenzorii ) (aka Adolf Friedrich’s Angolan colobus) located in a forest fragment near Lake Nabugabo, Masaka District, central Uganda (0°22’-12°S and 31°54’E). Lake Nabugabo is a small lake (8.2 x 5 km) west of Lake Victoria surrounded by a mix of swamp, wetland, grassland, primary and secondary forest, and degraded patches of forest (Chapman et al., 2016). This study focused on a band (TR band) of 132-139 colobus in 12-13 core units including one all-male unit (Stead & Teichroeb, 2019), occupying a moist tropical forest fragment made up partly of the Manwa Forest Reserve (~280 ha) lying on the west side of Lake Nabugabo (Teichroeb, Bridgett, Corriveau, & Twinomugisha, 2019). The forests that the study band occupies are at a mean elevation of 1,151 m with a relatively flat terrain (range: 1,134 – 1,167 m). Annual rainfall in this area during the Aug. 2017- July 2018 period was 758.59 mm across two rainy seasons, one from February to May and another from September to November. The mean annual temperature was 22.2°C (min. 18.7°C, max. 26.2°C) (Adams & Teichroeb, 2020). The three most dominant tree species in the forest, in terms of both stem number and basal area, arePseudospondias microcarpa (Anacardiaceae), Maesopsis eminii (Rhamnaceae), and Funtumia latifolia (Apocynaceae) (Teichroeb et al., 2019).