Showing 181 - 200 results of 393 for search '"orangutans"', query time: 0.14s Refine Results
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    Fluctuations of population density in Bornean orangutans (Pongo pygmaeus morio) related to fruit availability in the Danum Valley, Sabah, Malaysia: a 10-year record including two mast fruitings and three other peak fruitings by Tomoko Kanamori, Noko Kuze, Henry Bernard, Titol Peter Malim, Shiro Kohshima

    Published 2017
    “…We investigated the population density of Bornean orangutans (Pongo pygmaeus morio) and fruit availability for 10 years (2005–2014), in primary lowland dipterocarp forests in the Danum Valley, Sabah, Malaysia. …”
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    A field study on social behaviour, feeding regime and health status in semi-captive and free-ranging Orang Utans (Pongo pygmaeus) undergoing rehabilitation programme by A. B., Salina, N. B., Salim, Abdullah, Rasedee, Senthilvel, K. S. S. N.

    Published 2004
    “…The study was conducted at the Orang Utan Rehabilitation Centre (OURC) in Sabah and the Wildlife Centre (WC) in Sarawak with a population of 43 and 10 orangutans respectively. The result showed that both semicaptive and free-ranging orangutans spent 30.7% of their daytime climbing, 28.4% swinging, 24.3% playing and 16.6% resting. …”
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  11. 191

    Decision-making flexibility in New Caledonian crows, young children and adult humans in a multi-dimensional tool-use task. by Rachael Miller, Romana Gruber, Anna Frohnwieser, Martina Schiestl, Sarah A Jelbert, Russell D Gray, Markus Boeckle, Alex H Taylor, Nicola S Clayton

    Published 2020-01-01
    “…Adult humans, orangutans and cockatoos, but not crows and children, were able to refrain from selecting non-functional tools. …”
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  12. 192

    Ape conservation physiology: fecal glucocorticoid responses in wild Pongo pygmaeus morio following human visitation. by Michael P Muehlenbein, Marc Ancrenaz, Rosman Sakong, Laurentius Ambu, Sean Prall, Grace Fuller, Mary Ann Raghanti

    Published 2012-01-01
    “…Utilizing fecal samples (N = 53) from 2 wild habituated orangutans (Pongo pygmaeus morio) (in addition to 26 fecal samples from 4 wild unhabituated orangutans) in the Lower Kinabatangan Wildlife Sanctuary of Sabah, Malaysian Borneo, we predicted that i) fecal glucocorticoid metabolite concentrations would be elevated on the day after tourist visitation (indicative of normal stress response to exposure to tourists on the previous day) compared to samples taken before or during tourist visitation in wild, habituated orangutans, and ii) that samples collected from habituated animals would have lower fecal glucocorticoid metabolites than unhabituated animals not used for tourism. …”
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  13. 193

    Comparing the performances of apes (Gorilla gorilla, Pan troglodytes, Pongo pygmaeus) and human children (Homo sapiens) in the floating peanut task. by Daniel Hanus, Natacha Mendes, Claudio Tennie, Josep Call

    Published 2011-01-01
    “…Recently, Mendes et al. [1] described the use of a liquid tool (water) in captive orangutans. Here, we tested chimpanzees and gorillas for the first time with the same "floating peanut task." …”
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  14. 194

    Pongo Abelii Population Model with Changes in Carrying Capacity by Karsten Maynard Jabriel, Muhamad Jamaludin, Fidelis Nofertinus Zai

    Published 2023-07-01
    “…Pongo abelii is an endangered orangutan species. The reduction of Pongo abelii can be caused by the removal or loss of orangutans from the population and habitat loss. …”
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  15. 195

    Morphological differences in the calcaneus among extant great apes investigated by three-dimensional geometric morphometrics by Shuhei Nozaki, Hideki Amano, Motoharu Oishi, Naomichi Ogihara

    Published 2021-10-01
    “…However, morphological variations in the calcaneus of the great apes (chimpanzees, gorillas, and orangutans) have not been sufficiently studied. This study aims to clarify variations in calcaneal morphology among great apes based on three-dimensional geometric morphometrics. …”
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  16. 196

    Y-Chromosome variation in hominids: intraspecific variation is limited to the polygamous chimpanzee. by Gabriele Greve, Evguenia Alechine, Juan J Pasantes, Christine Hodler, Wolfram Rietschel, Terence J Robinson, Werner Schempp

    Published 2011-01-01
    “…Similar findings were noted for the 10 Y-chromosomal lineages examined in the Bornean orangutan (Pongo pygmaeus), and 11 Y-chromosomal lineages of the Sumatran orangutan (P. abelii). …”
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  17. 197

    Interspecific Encounters Among Diurnal Primates in Danum Valley, Borneo by Goro Hanya, Henry Bernard

    Published 2021
    “…We could not distinguish the association between red leaf monkeys and orangutans in the nonfruiting season from the possibility that the two species were independently attracted to the same place. …”
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  18. 198

    Does sympathy motivate prosocial behaviour in great apes? by Katja Liebal, Amrisha Vaish, Daniel Haun, Michael Tomasello

    Published 2014-01-01
    “…Results showed that in regard to the occurrence of prosocial behaviours, only orangutans, but not the African great apes, help others when help is needed, contrasting prior findings on chimpanzees. …”
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  19. 199

    Talar trochlear morphology may not be a good skeletal indicator of locomotor behavior in humans and great apes by Shuhei Nozaki, Motoharu Oishi, Naomichi Ogihara

    Published 2021-12-01
    “…The apical angles in gorillas and orangutans were significantly greater than those in humans and chimpanzees, but no statistical difference was observed between humans and chimpanzees, indicating that the apical angle did not necessarily correspond with the degree of arboreality in hominoids. …”
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    Evolutionary ecology of Miocene hominoid primates in Southeast Asia by S. G. Habinger, O. Chavasseau, J.-J. Jaeger, Y. Chaimanee, A. N. Soe, C. Sein, H. Bocherens

    Published 2022-07-01
    “…Abstract The evolutionary history and palaeoecology of orangutans remains poorly understood until today. The restricted geographic distribution of extant Pongo indicates specific ecological needs. …”
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