A5040224951- Primate Behavior and Ecology
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Rangeland Management and Livestock Ecology
- Music and Audio Processing
- Infant Health and Development
- Speech and Audio Processing
- German Literature and Culture Studies
- Psychology of Moral and Emotional Judgment
- Evolutionary Game Theory and Cooperation
- Memory, History, Trauma, Identity
- Evolutionary Psychology and Human Behavior
- Human-Animal Interaction Studies
- Psychoanalysis and Social Critique
University of Zurich
2010-2023
Orangutans (genus Pongo ) are the largest arboreal mammals, but Bornean orangutans ( P. pygmaeus spp .) also spend time on ground. Here, we investigate ground use among using 32,000 hr of direct focal animal observations from a well‐habituated wild population p. wurmbii living in closed‐canopy swamp forest at Tuanan, Central Kalimantan, Indonesia. Ground did not change with increasing observation individuals, suggesting it was an artifact observer presence. Flanged males spent most (ca. 5%...
Abstract Long calls by flanged male Bornean orang‐utans ( Pongo pygmaeus wurmbii ) serve as a long‐distance communication signal in this semi‐solitary species and allow individuals to adjust their ranging behavior. can be heard up circa 1 km dense rainforest. Only males emit them, various contexts: spontaneously (where no disturbances from the environment are perceived human observers), when highly aroused another male’s long call or falling tree nearby, right after having pushed over dead...
The long call is an important vocal communication signal in the widely dispersed, semi‐solitary orangutan. Long calls affect individuals' ranging behavior and mediate social relationships regulate encounters between dispersed individuals a dense rainforest. aim of this study was to test utility Acoustic Location System (ALS) for recording triangulating loud free‐living primates. We developed validated data extraction protocol ALS used record wild orangutan males' at Tuanan field site...
Acoustic individual discrimination has been demonstrated for a wide range of animal taxa. However, there far less scientific effort to demonstrate the effectiveness automatic identification, which could greatly facilitate research, especially when data are collected via an acoustic localization system (ALS). In this study, we examine accuracy caller recognition in long calls (LCs) emitted by Bornean male orangutans (Pongo pygmaeus wurmbii) derived from two data-sets: first consists...
The social and mating systems of orangutans, one our closest relatives, remain poorly understood. Orangutans (Pongo spp.) are highly sexually dimorphic females philopatric maintain individual, but overlapping home ranges, whereas males disperse, non-territorial wide-ranging, show bimaturism, with many years between reaching sexual maturity attaining full secondary characteristics (including cheek pads (flanges) emitting long calls). We report on 21 assigned paternities, among 35 flanged 15...
Abstract In many slowly developing mammal species, males reach sexual maturity well before they develop secondary characteristics. Sexually mature male orangutans have exceptionally long periods of developmental arrest. The two morphs been associated with behavioral alternative reproductive tactics, but this interpretation is based on cross‐sectional analyses predominantly Northwest Sumatran populations. Here we present the first longitudinal changes 10 adult that observed in both unflanged...
Sexual coercion is widespread in the animal kingdom.Its direct forms, including harassment and forced copulation, have largely been investigated as an expression of (alternative) male reproductive strategies, rather than result a sexual conflict between sexes.Likewise, frequent occurrence copulations orang-utans (Pongo spp.) has attributed to strategies more recently also concealed female fecundity.So far, however, immediate contextual variables leading rarely examined.We compared two...
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