scholarly journals Multi-year lactation and its consequences in Bornean orangutans (Pongo pygmaeus wurmbii)

2013 ◽  
Vol 67 (5) ◽  
pp. 805-814 ◽  
Author(s):  
Maria A. van Noordwijk ◽  
Erik P. Willems ◽  
Sri Suci Utami Atmoko ◽  
Christopher W. Kuzawa ◽  
Carel P. van Schaik
Keyword(s):  
Pongo Pygmaeus ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

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 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

scholarly journals The development and maintenance of sex differences in dietary breadth and complexity in Bornean orangutans

2021 ◽  
Vol 75 (5) ◽  
Author(s):  
Caroline Schuppli ◽  
S. Suci Utami Atmoko ◽  
Erin R. Vogel ◽  
Carel P. van Schaik ◽  
Maria A. van Noordwijk
Keyword(s):  
Sex Differences ◽  
Foraging Behavior ◽  
Role Models ◽  
Pongo Pygmaeus ◽  
Data Set ◽  
Dietary Breadth ◽  
Adult Females ◽  
Pongo Pygmaeus Wurmbii ◽  
Males And Females ◽  
Bornean Orangutans

Abstract Orangutans show a pronounced sexual dimorphism, with flanged males (i.e., males with fully grown secondary sexual characteristics) reaching twice the size of adult females. Furthermore, adult orangutans show sex-specific dispersal and activity patterns. This study investigates sex differences in adult foraging behavior and sheds light on how these differences develop in immatures. We analyzed 11 years of feeding data on ten adult female, seven flanged male, and 14 immature Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan in Central Kalimantan, Indonesia. We found that the diets of the adult females were significantly broader and required more processing steps before ingestion than the diets of flanged males. We also found evidence for a similar difference in overall diet repertoire sizes. For the immatures, we found that whereas females reached 100% of their mothers’ diet spectrum size by the age of weaning, males reached only around 80%. From the age of 4 years on (i.e., years before being weaned) females had significantly broader daily diets than males. We found no difference in daily or overall diet processing intensity of immature males and females but found preliminary evidence that immature males included fewer items of their mother’s diet in their own diets that were processing-intensive. Overall, our results suggest that by eating a broader variety and more complex to process food items, female orangutans go to greater lengths to achieve a balanced diet than males do. These behavioral differences are not just apparent in adult foraging behavior but also reflected in immature development from an early age on. Significance Statement In many species, males and females have different nutritional needs and are thus expected to show sex-specific foraging behavior. Sex differences in several aspects of foraging behavior have been found in various species, but it remains largely unclear when and how those develop during ontogeny, which is especially relevant for long-lived altricial species that learn foraging skills over many years. In our study, we analyzed a cross-sectional and longitudinal data set containing more than 750,000 feeding events of adult and immature Bornean orangutans (Pongo pygmaeus wurmbii). We found that adult females had significantly broader and more complex diets than males. We also found that these differences started to develop during infancy, suggesting that immature orangutans prepare for their sex-specific foraging niches long before those become physiologically relevant while they are still in constant association with their mothers and before being frequently exposed to other role models.

scholarly journals Evaluating Ketosis in Primate Field Studies: Validation of Urine Test Strips in Wild Bornean Orangutans (Pongo pygmaeus wurmbii)

2019 ◽  
Vol 91 (2) ◽  
pp. 159-168
Author(s):  
Daniel J. Naumenko ◽  
Malcolm Watford ◽  
Sri Suci Utami Atmoko ◽  
Wendy M. Erb ◽  
Erin R. Vogel
Keyword(s):  
Field Studies ◽  
Pongo Pygmaeus ◽  
Urine Test ◽  
Test Strips ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

scholarly journals After the smoke has cleared: Extended low fruit productivity following forest fires decreased gregariousness and social tolerance among wild female Bornean orangutans (Pongo pygmaeus wurmbii)

2021 ◽  
Author(s):  
Alison M. Ashbury ◽  
Jade Meric de Bellefon ◽  
Julia A. Kunz ◽  
Misdi Abdullah ◽  
Anna M. Marzec ◽  
...  
Keyword(s):  
Forest Fires ◽  
Extended Period ◽  
Pongo Pygmaeus ◽  
Food Sources ◽  
Social Tolerance ◽  
Wild Female ◽  
Fruit Availability ◽  
Adult Females ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

AbstractAs climate change continues to fundamentally alter resource landscapes, the ability to flexibly respond to spatio-temporal changes in the distribution of preferred food sources is increasingly important for the overall health and fitness of animals living in seasonal, variable, and/or changing environments. Here, we investigate the effects of an uncharacteristically long period of fruit scarcity, following widespread thick haze caused by peat and forest fires in 2015, on the behaviour and sociality of female Bornean orangutans (Pongo pygmaeus wurmbii). We collected data from 2010 to 2018 at Tuanan, Central Kalimantan, Indonesia, and compared the activity, diet, and association patterns of adult females during low-fruit periods before the fires, i.e., regular, seasonal periods of low fruit availability (“pre-fire”), and after the fires, i.e., during the extended period of low fruit availability (“post-fire”). First, we found that, post-fire, female orangutans adopted a more extreme energy-saving activity pattern and diet — resting more, travelling less, and diet-switching to less-preferred foods — compared to pre-fire. Second, we found that the probabilities of association between females and their weaned immature offspring, and between related and unrelated adult females were lower, and the probability of agonism between unrelated females was higher, post-fire than pre-fire. This change in energetic strategy, and the general reduction in gregariousness and social tolerance, demonstrates how forest fires can have lasting consequences for orangutans. Fission–fusion species such as orangutans can mitigate the effects of changes in resource landscapes by altering their (sub)grouping patterns; however, this may have long-term indirect consequences on their fitness.

Why do orangutans leave the trees? Terrestrial behavior among wild Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan, Central Kalimantan

2015 ◽  
Vol 77 (11) ◽  
pp. 1216-1229 ◽  
Author(s):  
Alison M. Ashbury ◽  
Mary Rose C. Posa ◽  
Lynda P. Dunkel ◽  
Brigitte Spillmann ◽  
S. Suci Utami Atmoko ◽  
...  
Keyword(s):  
Pongo Pygmaeus ◽  
Central Kalimantan ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

Airsacculitis in fourteen juvenile southern Bornean orangutans (Pongo pygmaeus wurmbii)

2006 ◽  
Vol 35 (3) ◽  
pp. 149-154 ◽  
Author(s):  
Becki Lawson ◽  
Rosa Garriga ◽  
Birute M.F. Galdikas
Keyword(s):  
Pongo Pygmaeus ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans
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