"Roadside monkeys: Anthropogenic impacts on moor macaque (Macaca maura) ranging patterns in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia" Erin P. Riley, Joshua S. Trinidad, Kristen S. Morrow, Cristina Sagnotti, Monica Carosi, and Putu Oka Ngakan A growing body of research focuses on how roads, an increasingly pervasive form of infrastructural development, affect wildlife and ecosystems. At our field site in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia, a major provincial road bisects the home range of multiple groups of moor macaques (Macaca maura). One of these groups has been habituated to human presence for many years, but it has never been observed interacting with people traveling on the road. Recently though, we observed a behavioral shift by this group involving them spending approximately 30% of the day along the road where they wait for motorists to toss them food and forage in trash pits. Our research focused on how this behavioral shift has affected their use of space. We compared spatial use data collected before the shift (2010-2011) with data collected after the shift began (2016-2017) to assess changes in ranging patterns. The spatial location of the group was recorded every 30 min during 6-h behavioral observation blocks using Garmin 60Csx and MAP 64s units. We analyzed the spatial data using ArcGIS v. 10.3 and Geospatial Modeling Environment (GME). We used the minimum convex polygon (MCP) tool to calculate home range size and the Kernel Density Estimation (KDE) tool to generate core areas for both time periods. We generated daily path lengths (DPL) by using the points-to-line tool for each individual day per time period. Daily path length was significantly longer in 2016-2017 (mean ± SD: 1430 ± 154 m) compared to 2010-2011 (mean ± SD: 1089 ± 85 m) (Z = -2.857, p = .004). Total home range size increased from 2010-2011 (MCP = 33.7 ha, KDE 95% = 29.4 ha) to 2016-2017 (MCP = 57.9 ha, KDE 95% = 42.7 ha), as did core area size (8.6 ha to 11.7 ha). The percentage of GPS points from the KDE 95% located within 15 m of the road increased from 2010-2011 (12.9%) to 2016-2017 (18.7%). Our results suggest that access to human foods on the road has resulted in the group increasing their daily travel and expanding the size and adjusting the location of their range to include more area in proximity to the road. These changes could negatively affect the group’s ability to maintain access to its original core area and increase the likelihood of injury from motorists and vehicles.
Riley, E.P., Trinidad, J.S., Morrow, K.S., Sagnotti, C., Carosi, M., Putu Oka Ngakan, A. (2018). Roadside monkeys: anthropogenic impacts on moor macaque (Macaca maura) ranging patterns in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia. In 55th Meeting Association for Tropical Biology and Conservation, ATBC - Abstract Book 2018 (pp.104-104).
Roadside monkeys: anthropogenic impacts on moor macaque (Macaca maura) ranging patterns in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia
Monica Carosi;
2018-01-01
Abstract
"Roadside monkeys: Anthropogenic impacts on moor macaque (Macaca maura) ranging patterns in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia" Erin P. Riley, Joshua S. Trinidad, Kristen S. Morrow, Cristina Sagnotti, Monica Carosi, and Putu Oka Ngakan A growing body of research focuses on how roads, an increasingly pervasive form of infrastructural development, affect wildlife and ecosystems. At our field site in Bantimurung-Bulusaraung National Park, Sulawesi, Indonesia, a major provincial road bisects the home range of multiple groups of moor macaques (Macaca maura). One of these groups has been habituated to human presence for many years, but it has never been observed interacting with people traveling on the road. Recently though, we observed a behavioral shift by this group involving them spending approximately 30% of the day along the road where they wait for motorists to toss them food and forage in trash pits. Our research focused on how this behavioral shift has affected their use of space. We compared spatial use data collected before the shift (2010-2011) with data collected after the shift began (2016-2017) to assess changes in ranging patterns. The spatial location of the group was recorded every 30 min during 6-h behavioral observation blocks using Garmin 60Csx and MAP 64s units. We analyzed the spatial data using ArcGIS v. 10.3 and Geospatial Modeling Environment (GME). We used the minimum convex polygon (MCP) tool to calculate home range size and the Kernel Density Estimation (KDE) tool to generate core areas for both time periods. We generated daily path lengths (DPL) by using the points-to-line tool for each individual day per time period. Daily path length was significantly longer in 2016-2017 (mean ± SD: 1430 ± 154 m) compared to 2010-2011 (mean ± SD: 1089 ± 85 m) (Z = -2.857, p = .004). Total home range size increased from 2010-2011 (MCP = 33.7 ha, KDE 95% = 29.4 ha) to 2016-2017 (MCP = 57.9 ha, KDE 95% = 42.7 ha), as did core area size (8.6 ha to 11.7 ha). The percentage of GPS points from the KDE 95% located within 15 m of the road increased from 2010-2011 (12.9%) to 2016-2017 (18.7%). Our results suggest that access to human foods on the road has resulted in the group increasing their daily travel and expanding the size and adjusting the location of their range to include more area in proximity to the road. These changes could negatively affect the group’s ability to maintain access to its original core area and increase the likelihood of injury from motorists and vehicles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
