ArticleAmerican journal of primatology2020
Grouping behavior of Sumatran orangutans (Pongo abelii) and Tapanuli orangutans (Pongo tapanuliensis) living in forest with low fruit abundance.
Article in American journal of primatology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- The development of play face mimicry: comparative insights from human infants, adults and orangutans.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2026Article
- The play fever: individual and group factors influence the contagion of play behaviour within social hominid groups.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2026Article
- Outcomes of orangutan wild-to-wild translocations reveal conservation and welfare risks.PloS one · 2025Article
- Flanged males have higher reproductive success in a completely wild orangutan population.PloS one · 2024Article
- Play Behavior Varies with Age, Sex, and Socioecological Context in Wild, Immature Orangutans (International journal of primatology · 2024Article
- Reproductive success of Bornean orangutan males: scattered in time but clustered in space.Behavioral ecology and sociobiology · 2023Article
- Potential resilience treatments for orangutans (Animal welfare (South Mimms, England) · 2023Article
- No Evidence for Biased Attention Towards Emotional Scenes in Bornean Orangutans (Affective science · 2022Article
- A socio-ecological perspective on the gestural communication of great ape species, individuals, and social units.Ethology, ecology & evolution · 2022Review
- Nest Characteristics of the Sumatran Orangutan (Tropical life sciences research · 2021Article
- Multicomponent and multisensory communicative acts in orang-utans may serve different functions.Communications biology · 2021Article
- The cost of associating with males for Bornean and Sumatran female orangutans: a hidden form of sexual conflict?Behavioral ecology and sociobiology · 2021Article
- Experimental evidence for yawn contagion in orangutans (Pongo pygmaeus).Scientific reports · 2020Article
- Grouping behavior of Sumatran orangutans (Pongo abelii) and Tapanuli orangutans (Pongo tapanuliensis) living in forest with low fruit abundance.American journal of primatology · 2020Article
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5 authors.
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Abstract
In contrast to the African great apes, orangutans (Pongo spp.) are semisolitary: Individuals are often on their own, but form aggregations more often than expected by chance. These temporary aggregations provide social benefits such as mating opportunities. When fruit availability is high, costs of aggregating should be lower, because competition is less pronounced. Therefore, average party size is expected to be higher when fruit availability is high. This hypothesis would also explain why orangutans in highly fruit-productive habitats on Sumatra are more gregarious than in the usually less productive habitats of Borneo. Here, we describe the aggregation behavior of orangutans in less productive Sumatran habitats (Sikundur and Batang Toru), and compare results with those of previously surveyed field sites. Orangutans in Sikundur were more likely to form parties when fruit availability was higher, but the size of daily parties was not significantly affected by fruit availability. With regard to between-site comparisons, average party sizes of females and alone time of parous females in Sikundur and Batang Toru were substantially lower than those for two previously surveyed Sumatran sites, and both fall in the range of values for Bornean sites. Our results indicate that the assessment of orangutans on Sumatra as being more social than those on Borneo needs revision. Instead, between-site differences in sociality seem to reflect differences in average fruit availability.
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