Publications

The data collected at Suaq has resulted in the following scientific publications:

2024

Fröhlich, M., van Noordwijk, M. A., Mitra Setia, T., van Schaik, C. P., & Knief, U. (2024). Wild and captive immature orangutans differ in their non-vocal communication with others, but not with their mothers. Behavioral Ecology and Sociobiology, 78(1), 12.

Kunz, J. A., Falkner, S. S., Aprilinayati, F., Duvot, G. J., Fröhlich, M., Willems, E. P., Atmoko S. S. U., van Schaik C. P., Schuppli, C. & van Noordwijk, M. A. (2024). Play Behavior Varies with Age, Sex, and Socioecological Context in Wild, Immature Orangutans (Pongo spp.). International Journal of Primatology, 1-35.

Laumer, I. B., Rahman, A., Rahmaeti, T., Azhari, U., Hermansyah, Atmoko, S. S. U., & Schuppli, C. (2024). Active self-treatment of a facial wound with a biologically active plant by a male Sumatran orangutan. Scientific Reports, 14(1), 8932.

Mörchen, J., Luhn, F., Wassmer, O., Kunz, J. A., Kulik, L., van Noordwijk, M. A., Rianti, P., Rahmaeti, T., Atmoko, S.S.U., Widdig, A. & Schuppli, C. (2024). Orangutan males make increased use of social learning opportunities when resource availability is high. Iscience, 27(2).

Permana, A. L., Permana, J. J., Nellissen, L., Prasetyo, D., Wich, S. A., van Schaik, C. P., & Schuppli, C. (2024). The ontogeny of nest-building behaviour in Sumatran orang-utans, Pongo abelii. Animal Behaviour, 211, 53-67.

Revathe, T., Mundry, R., Utami-Atmoko, S. S., Perawati, D., Bürkner, P. C., van Noordwijk, M. A., & Schuppli, C. (2024). Maternal behavior in Sumatran orangutans (Pongo abelii) is modulated by mother-offspring characteristics and socioecological factors. International Journal of Primatology, 1-28.

 

2023

Kunz, J. A., Duvot, G. J., Ashbury, A. M., Willems, E. P., Spillmann, B., Dunkel, L. P., bin Abdullah, M., Schuppli, C., Vogel, E.R., Utami Atmoko, S.S. & van Schaik, C. P. (2023). Alternative reproductive tactics of unflanged and flanged male orangutans revisited. American Journal of Primatology, 85(9), e23535.

Mörchen, J., Luhn, F., Wassmer, O., Kunz, J. A., Kulik, L., van Noordwijk, M. A., van Schaik, C. P., Rianti, P., Utami Atmoko, S.S., Widdig, A. & Schuppli, C. (2023). Migrant orangutan males use social learning to adapt to new habitat after dispersal. Frontiers in Ecology and Evolution, 11, 1158887.

Schuppli, C., Nellissen, L., Carvajal, L., Ashbury, A. M., Oliver-Caldwell, N., Rahmaeti, T., Laumer, I., & Haun, D. (2023). Ecological, social, and intrinsic factors affecting wild orangutans’ curiosity, assessed using a field experiment. Scientific Reports, 13(1), 13184.

van Noordwijk, M.A., LaBarge, L.R., Kunz, J.A., Marzec, A.M., Spillmann, B., Ackermann, C., Rianti, P., Vogel, E.R., Atmoko, S.S.U., Kruetzen, M., & van & van Schaik, C. P. (2023). Reproductive success of Bornean orangutan males: scattered in time but clustered in space. Behavioral Ecology and Sociobiology, 77(12), 134.

 

2022

Ashbury, A. M., Meric de Bellefon, J., Kunz, J. A., Abdullah, M., Marzec, A. M., Fryns, C., Atmoko, S.S.U., van Schaik, C.P., & van Noordwijk, M. A. (2022). 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). International Journal of Primatology, 1-27.

Fröhlich, M., & van Schaik, C. P. (2022). Social tolerance and interactional opportunities as drivers of gestural redoings in orang-utans. Philosophical Transactions of the Royal Society B, 377(1859), 20210106.

Fröhlich, M., van Schaik, C. P., van Noordwijk, M. A., & Knief, U. (2022). Individual variation and plasticity in the infant-directed communication of orang-utan mothers. Proceedings of the Royal Society B, 289(1975), 20220200.

 

2021

Ehmann, B., van Schaik, C. P., Ashbury, A. M., Mörchen, J., Musdarlia, H., Atmoko, S. U., van Noordwijk, M. A., & Schuppli, C. (2021). Immature wild orangutans acquire relevant ecological knowledge through sex-specific attentional biases during social learning. PLoS Biology 19, e3001173.

Fröhlich, M., Bartolotta, N., Fryns, C., Wagner, C., Momon, L., Jaffrezic, M., Mitra Setia, T., van Noordwijk, M.A., & van Schaik, C.P. (2021). Multicomponent and multisensory communicative acts in orang-utans may serve different functions. Commun Biol 4, 917 (2021)

Fröhlich, M., Bartolotta, N., Fryns, C., Wagner, C., Momon, L., Jaffrezic, M., Setia, T. M., Schuppli, C., van Noordwijk, M. A., & van Schaik, C. P. (2021). Orang-utans have larger gestural repertoires in captivity than in the wild–a case of weak innovation? iScience 24 (11), 103304.

Kunz, J. A., Duvot, G. J., Willems, E. P., Stickelberger, J., Spillmann, B., Atmoko, S. S. U., van Noordwijk, M.A. & van Schaik, C. P. (2021). The context of sexual coercion in orang-utans: when do male and female mating interests collide?. Animal Behaviour, 182, 67-90.

Kunz, J. A., Duvot, G. J., van Noordwijk, M. A., Willems, E. P., Townsend, M., Mardianah, N., Utami Atmoko, S.S., Vogel, E.R., Nugraha, T.P., Heistermann, M. and Agil, M., Weingrill, T. & van Schaik, C. P. (2021). The cost of associating with males for Bornean and Sumatran female orangutans: a hidden form of sexual conflict?. Behavioral Ecology and Sociobiology, 75, 1-22.

Mikeliban, M., Kunz, B., Rahmaeti, T., Uomini, N., & Schuppli, C. (2021). Orangutan mothers adjust their behaviour during food solicitations in a way that likely facilitates feeding skill acquisition in their offspring. Scientific Reports 11, 23679.

Schuppli, C., Atmoko, S. S. U., Vogel, E. R., van Schaik, C. P., & van Noordwijk, M. A. (2021). The development and maintenance of sex differences in dietary breadth and complexity in Bornean orangutans. Behavioral Ecology and Sociobiology 75 (5), 81.

Schuppli, C., Van Cauwenberghe, A., Setia, T. M., & Haun, D. (2021). The ontogeny of exploratory object manipulation behaviour in wild orangutans. Evolutionary Human Sciences 3, E39.

 

2020

Frohlich, M., Kunz, J., Fryns, C., Falkner, S., Rukmana, E., Schuppli, M., Kneif, U., Utami-Atmoko S. A., Schuppli, C., van Noordwijk, M.  (2020). Social interactions and interaction partners in infant orang-utans of two wild populations. Animal Behaviour, 166, 183-191

Schuppli, C., van Noordwijk, M., Atmoko, SU., van Schaik, CP. (2020). Early sociability fosters later exploratory tendency in wild immature orangutans. Sci Adv. 2020 Jan 8;6(2)

 

2019

Schuppli, C., van Schaik, CP. (2019). Social learning among wild orangutans: is it affective? In: Dukes D, Clément F (eds) Foundations of affective social learning. Cambridge University Press, Cambridge, pp 25–40

Fröhlich, M., Lee, K., Mitra Setia, T., Schuppli, C., van Schaik, CP. (2019). The loud scratch: a newly identified gesture of Sumatran orangutan mothers in the wild. Biol Lett. 2019 Jul 26;15(7)

 

2018

van Noordwijk, M. A., Utami-Atmoko, S. A., Knott, C. D., Kuze, N., Morrogh-Bernard, H. C., Oram, F., Schuppli C., van Schaik, CP., Willems, E. P. (2018). The slow ape: High infant survival and long interbirth intervals in wild orangutans. Journal of Human Evolution, 125, 38-49

 

2017

Schuppli, C., Forss, S., Meulman, E., Utami Atmoko, S. A., van Noordwijk, M. A., van Schaik, CP.  (2017). The effects of sociability on exploratory tendency and innovation repertoires in wild Sumatran and Bornean orangutans. Scientific Reports 7, 15464 (2017)

 

2016

Schuppli, C., Forss, S. I., Meulman, E. J., Zweifel, N., Lee, K. C., Rukmana, E., Vogel, E.R., van Noordwijk, M.A., van Schaik, C. P. (2016). Development of foraging skills in two orangutan populations: needing to learn or needing to grow? Frontiers in Zoology, 13(1), 43.

Schuppli, C., Meulman, E., Forss, S. I. F., Aprilinayati, F., Van Noordwijk, M. A., & Van Schaik, C. P. (2016). Observational social learning and socially induced practice of routine skills in wild immature orang-utans. Animal Behaviour, 119, 87-98.

van Schaik, C. P., Burkart, J., Damerius, L., Forss, S. I. F., Koops, K., van Noordwijk, M. A., & Schuppli, C. (2016). The reluctant innovator: orangutans and the phylogeny of creativity. Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 371(1690). doi:10.1098/rstb.2015.0183

 

2015

Forss, S. I. F., Schuppli, C., Haiden, D., Zweifel, N., & Van Schaik, C. P. (2015). Contrasting Responses to Novelty by Wild and Captive Orangutans. International Journal of Primatology, 77(10), 1109-1121. doi:10.1002/ajp.22445

 

2013

Dunkel, L. P., Arora, N., van Noordwijk, M. A., Utami Atmoko, S. A., Prathama Putra, A., Krützen, M., & van Schaik, C. P. (2013). Variation in developmental arrest among male orangutans: a comparison between a Sumatran and a Bornean population. Frontiers in Zoology, 10, 12.

Meulman, E. J. M., & van Schaik, C. P. (2013). Orangutan tool use and the evolution of technology. Tool Use in Animals: Cognition and Ecology, 176-202.

 

2012

Meulman, E. J., Sanz, C. M., Visalberghi, E., & van Schaik, C. P. (2012). The role of terrestriality in promoting primate technology. Evol. Anthropol., 21(2), 58-68.

 

2011

Barrickman, N. L., Bastian, M. L., Isler, K., & van Schaik, C. P. (2008). Life history costs and benefits of encephalization: a comparative test using data from long-term studies of primates in the wild. Journal of Human Evolution, 54(5), 568-590. doi:10.1016/j.jhevol.2007.08.012

Krützen, M., Willems, E. P., & van Schaik, C. P. (2011). Culture and geographic variation in orangutan behavior. Current Biology, 21, 1808-1812.

 

2009

Singleton, I., Knott, C. D., Morrogh-Bernard, H. C., Wich, S. A., & van Schaik, C. P. (2009). Ranging behavior of orangutan females and social organization. In S. A. Wich, S. S. Utami Atmoko, T. Mitra Setia, & C. P. van Schaik (Eds.), Orangutans: geographic variation in behavioral ecology and conservation. [Oxford Biology.] (pp. 205-213).

Van Noordwijk, M. A., Sauren, S. E. B., Nuzuar, Abulani, A., Morrogh-Bernard, H., Utami, S. A., & van Schaik, C. P. (2009). Development of independence: Sumatran and Bornean orangutans compared. In S. A. Wich, T. Mitra Setia, S. A. Utami Atmoko, & C. P. Van Schaik (Eds.), Orangutans Compared: Geographic Variation in Behavioral Ecology and Conservation (pp. 189-203). Oxford: Oxford University Press.

van Schaik, C. P. (2009). Geographic variation in the behavior of wild great apes: is it really cultural? In K. N. Laland & B. G. Galef (Eds.), The Question of Animal Culture (pp. 70-98). Cambridge, MA: Harvard University Press.

van Schaik, C. P., Ancrenaz, M., Djojoasmoro, R., Knott, C. D., Morrogh-Bernard, H. C., Nuzuar, . . . van Noordwijk, M. A. (2009). Orangutan cultures revisited.

van Schaik, C. P., van Noordwijk, M. A., & Vogel, E. R. (2009). Ecological sex differences in wild orangutans. In S. A. Wich, T. Mitra Setia, S. A. Utami Atmoko, & C. P. Van Schaik (Eds.), Orangutans Compared: Geographic Variation in Behavioral Ecology and Conservation (pp. 255-268). Oxford: Oxford University Press.

van Schaik, C. P., van Noordwijk, M. A., & Vogel, E. R. (2009). Ecological sex differences in wild orangutans.

van Schaik, C. P., Marshall, A. J., & Wich, S. A. (2009). Geographic variation in orangutan behavior and biology: its functional interpretation and its mechanistic basis.

Wich, S. A., de Vries, H., Ancrenaz, M., Perkins, L., Shumaker, R. W., Suzuki, A., & van Schaik, C. P. (2009). Orangutan life history variation: Oxford University Press.

 

2008

Barrickman, N. L., Bastian, M. L., Isler, K., & van Schaik, C. P. (2008). Life history costs and benefits of encephalization: a comparative test using data from long-term studies of primates in the wild. Journal of Human Evolution, 54(5), 568-590. doi:10.1016/j.jhevol.2007.08.012

 

2005

van Noordwijk, M. A., & van Schaik, C. P. (2005). Development of ecological competence in Sumatran orangutans. American Journal of Physical Anthropology, 127, 79-94.

 

2004

van Schaik, C., & van Schaik, C. (2004). Among orangutans: red apes and the rise of human culture.

van Schaik, C. P. (2004). Among Orangutans: Red Apes and the Rise of Human Culture. Cambridge, MA: Harvard University Press (Belknap.

Wich, S. A., Utami-Atmoko, S. S., Mitra Setia, T., Rijksen, H. D., Schurmann, C., van Hooff, J. A. R. A.     M., & van Schaik, C. P. (2004). Life history of wild Sumatran orangutans (Pongo abelii).     Journal of Human Evolution, 47, 385-398.

 

2003

van Schaik, C. P. (2003). Orangutan cultures and the comparative study of culture. American Journal of Physical Anthropology, 214-214.  Retrieved from <Go to ISI>://WOS:000181670000617

Van Schaik, C. P. (2003). Local traditions in oragutans and chimpanzees: social learning and social tolerance.

van Schaik, C. P., Ancrenaz, M., Borgen, G., Galdikas, B., Knott, C. D., Singleton, I., . . . Merrill, M. (2003). Orangutan cultures and the evolution of material culture. Science, 299(5603), 102-105. doi:10.1126/science.1078004

van Schaik, C. P., Fox, E. A., & Fechtman, L. T. (2003). Individual variation in the rate of use of tree-hole tools among wild orang-utans: implications for hominin evolution. Journal of Human Evolution, 44(1), 11-23. doi:10.1016/s0047-2484(02)00164-1

 

2002

Singleton, I., & van Schaik, C. P. (2002). The social organisation of a population of Sumatran orang-utans. Folia Primatologica, 73(1), 1-20. doi:10.1159/000060415

 

2001

Singleton, I., & van Schaik, C. P. (2001). Orangutan home range size and its determinants in a Sumatran swamp forest. International Journal of Primatology, 22(6), 877-911. doi:10.1023/a:1012033919441

van Schaik, C. P., Monk, K. A., & Robertson, J. M. Y. (2001). Dramatic decline in orang-utan numbers in the Leuser Ecosystem, northern Sumatra. Oryx, 35, 14-25.

Van Schaik, C. P., & Knott, C. D. (2001). Geographic variation in tool use on Neesia fruits in orangutans. American Journal of Physical Anthropology, 114(4), 331-342. doi:10.1002/ajpa.1045

 

1999

van Schaik, C. P. (1999). The socioecology of fission-fusion sociality in orangutans. Primates, 40, 73-90.

van Schaik, C. P., Deaner, R. O., & Merrill, M. Y. (1999). The conditions for tool use in primates: implications for the evolution of material culture. J. Hum. Evol., 36(6), 719-741.

 

1995

van Schaik, C. P., Azwar, & Priatna, D. (1995). Population estimates and habitat preferences of orangutans based on line transects of nests. In R. D. Nadler, B. F. M. Galdikas, L. K. Sheeran, & N. Rosen (Eds.), The Neglected Ape (pp. 129-147). New York: Plenum Press.

 

1996

van Schaik, C. P. (1996). Does the orangutan have a future? Population Status in Gunung Leuser National Park. In C. P. van Schaik & J. Supriatna (Eds.), Leuser: A Sumatran Sanctuary (pp. 249-258). Depok, Indonesia: YABSHI.

van Schaik, C. P., Fox, E. A., & Sitompul, A. F. (1996). Manufacture and use of tools in wild Sumatran orangutans. Naturw., 83, 186-188.

 

1991

van Schaik, C. P., & Azwar. (1991). Orangutan densities in differing forest types in the Gunung Leuser National Park (Sumatra), as determined by nest counts. Retrieved from