scholarly journals Successful observation of orangutans in the wild with thermal-equipped drones

2019 ◽  
Vol 7 (3) ◽  
pp. 235-257 ◽  
Author(s):  
Claire Burke ◽  
Maisie F. Rashman ◽  
Steven N. Longmore ◽  
Owen McAree ◽  
Paul Glover-Kapfer ◽  
...  
Keyword(s):  
Pongo Pygmaeus ◽  
Thermal Camera ◽  
Survey Tool ◽  
In The Wild ◽  
Successful Observation ◽  
Proboscis Monkeys ◽  
Bornean Orangutans

We investigated the efficacy of a drone equipped with a thermal camera as a potential survey tool to detect wild Bornean orangutans (Pongo pygmaeus) and other tropical primates. Using the thermal camera we successfully detected 41 orangutans and a troop of proboscis monkeys, all of which were confirmed by ground observers. We discuss the potential advantages and limitations of thermal-equipped drones as a tool to complement other methods, and the potential of this technology for use as a future survey tool.

Home range establishment and the mechanisms of philopatry among female Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan

2020 ◽  
Vol 74 (4) ◽  
Author(s):  
Alison M. Ashbury ◽  
Erik P. Willems ◽  
Sri Suci Utami Atmoko ◽  
Fajar Saputra ◽  
Carel P. van Schaik ◽  
...  
Keyword(s):  
Home Range ◽  
Pongo Pygmaeus ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

scholarly journals Bornean orangutans on the brink of protein bankruptcy

2011 ◽  
Vol 8 (3) ◽  
pp. 333-336 ◽  
Author(s):  
Erin R. Vogel ◽  
Cheryl D. Knott ◽  
Brooke E. Crowley ◽  
Melissa D. Blakely ◽  
Michael D. Larsen ◽  
...  
Keyword(s):  
G Protein ◽  
Daily Intake ◽  
Urinary Metabolites ◽  
Pongo Pygmaeus ◽  
Wild Animals ◽  
Protein Balance ◽  
Mountain Gorillas ◽  
Fat Reserves ◽  
Adaptive Value ◽  
Bornean Orangutans

Protein is a limiting resource that is essential to the growth, maintenance and reproduction of tropical frugivores, yet few studies have examined how wild animals maintain protein balance. During chronic periods of fruit scarcity, Bornean orangutans ( Pongo pygmaeus ) often catabolize their own fat reserves despite unusually low metabolic requirements. Such energy deficits suggest a marginal existence, and raise the possibility that orangutans also endure periods of negative protein balance. To test this hypothesis, we conducted the first study of protein cycling in a wild primate. Our five year analysis of urinary metabolites revealed evidence of protein recycling when fruit was scarce. During these periods, orangutans consumed more leaves and bark, proteinaceous but tough foods that yielded a mean daily intake of 1.4 g protein kg −1 metabolic mass. Such an amount is inadequate for humans and one-tenth the intake of mountain gorillas, but sufficient to avert, perhaps narrowly, a severe protein deficit. Our findings highlight the functional and adaptive value of traits that maximize protein assimilation during periods of ecological exigency.

scholarly journals Nutritional ecology of wild Bornean orangutans (Pongo pygmaeus wurmbii ) in a peat swamp habitat: Effects of age, sex, and season

2016 ◽  
Vol 79 (4) ◽  
pp. e22618 ◽  
Author(s):  
Erin R. Vogel ◽  
Shauhin E. Alavi ◽  
Sri Suci Utami-Atmoko ◽  
Maria A. van Noordwijk ◽  
Timothy D. Bransford ◽  
...  
Keyword(s):  
Nutritional Ecology ◽  
Pongo Pygmaeus ◽  
Peat Swamp ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

scholarly journals The Ontogeny of Gap Crossing Behaviour in Bornean Orangutans (Pongo pygmaeus wurmbii)

PLoS ONE ◽  
2015 ◽  
Vol 10 (7) ◽  
pp. e0130291 ◽  
Author(s):  
Jackie Chappell ◽  
Abigail C. Phillips ◽  
Maria A. van Noordwijk ◽  
Tatang Mitra Setia ◽  
Susannah K. S. Thorpe
Keyword(s):  
Pongo Pygmaeus ◽  
Pongo Pygmaeus Wurmbii ◽  
Gap Crossing ◽  
Bornean Orangutans

Use of limestone karst forests by Bornean orangutans (Pongo pygmaeus morio) in the Sangkulirang peninsula, east Kalimantan, Indonesia

2007 ◽  
Vol 69 (2) ◽  
pp. 212-219 ◽  
Author(s):  
Andrew J. Marshall ◽  
Leonardo A. Salas ◽  
Suzette Stephens ◽  
Nardiyono ◽  
Linda Engström ◽  
...  
Keyword(s):  
Pongo Pygmaeus ◽  
East Kalimantan ◽  
Bornean Orangutans
Sign in / Sign up

Export Citation Format

Share Document