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).