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16 - Orangutan Sexual Behavior

from Part III - Nonhuman Primate Sexual Behavior

Published online by Cambridge University Press:  30 June 2022

By
Julia A. Kunz ,
Maria A. van Noordwijk  and
Carel P. van Schaik
Edited by
Todd K. Shackelford
Todd K. Shackelford
Affiliation:
Oakland University, Michigan
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Summary

Orangutan females live semi-solitarily, spending 50–80 percent of their time alone, with only their dependent offspring for company (van Schaik, 1999). They are philopatric (Arora et al., 2012; van Noordwijk et al., 2002) and establish their home ranges in an area that overlaps with their natal range as well as with those of other females, both maternal relatives and nonrelatives (Ashbury et al., 2020; Morrogh-Bernard, 2009). Males disperse from their natal range as they become independent of their mother around the age of ten to twelve years (Nietlisbach et al., 2012) and settle far away from their natal area. Adult males are not territorial, and their home ranges overlap with those of females, but are far larger (Singleton et al., 2009). Determining male ranging patterns is challenging because their ranging area far exceeds the size of all study areas covered by earth-bound researchers, and individual males may not be around for several months or even years (Dunkel et al., 2013; Spillmann et al., 2017; Utami Atmoko et al., 2009a). In sum, orangutans have a dispersed social and mating system with high female site fidelity and widely roaming males.

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The Cambridge Handbook of Evolutionary Perspectives on Sexual Psychology , pp. 401 - 425
Publisher: Cambridge University Press
Print publication year: 2022

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References

Ancrenaz, M., Gumal, M., Marshall, A. J., Meijaard, E., Wich, S. A., & Husson, S. (2016). Pongo pygmaeus (errata version published in 2018). In The IUCN red list of threatened species 2016 e. T17975A17966347. https://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T17975A17966347.enGoogle Scholar
Andersson, M. B. (1994). Sexual selection. Princeton, NJ: Princeton University Press.Google Scholar
Archie, E. A., Altmann, J., & Alberts, S. C. (2014). Costs of reproduction in a long-lived female primate: Injury risk and wound healing. Behavioral Ecology and Sociobiology, 68, 1183–1193.Google Scholar
Arora, N., Van Noordwijk, M. A., Ackermann, C., Willems, E. P., Nater, A., Greminger, M., … & Krützen, M. (2012). Parentage-based pedigree reconstruction reveals female matrilineal clusters and male-biased dispersal in nongregarious Asian great apes, the Bornean orangutans (Pongo pygmaeus). Molecular Ecology, 21, 3352–3362.Google Scholar
Ashbury, A. M., Willems, E. P., Utami Atmoko, S. S., Saputra, F., van Schaik, C. P., & van Noordwijk, M. A. (2020). Home range establishment and the mechanisms of philopatry among female Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan. Behavioral Ecology and Sociobiology, 21(4), 42.Google Scholar
Banes, G. L., Galdikas, B. M. F., & Vigilant, L. (2015). Male orangutan bimaturism and reproductive success at Camp Leakey in Tanjung Puting National Park, Indonesia. Behavioral Ecology and Sociobiology, 65, 1785–1794.Google Scholar
Baniel, A., Cowlishaw, G., & Huchard, E. (2017). Male violence and sexual intimidation in a wild primate society. Current Biology, 27, 2163–2168.CrossRefGoogle Scholar
Bellemain, E., Swenson, J. E., & Taberlet, P. (2006). Mating strategies in relation to sexually selected infanticide in a non‐social carnivore: The brown bear. Ethology, 112, 238–246.Google Scholar
Clutton-Brock, T., & McAuliffe, K. (2009). Female mate choice in mammals. Quarterly Review of Biology, 84, 3–27.Google Scholar
Clutton-Brock, T., & Parker, G. A. (1992). Potential reproductive rates and the operation of sexual selection. Quarterly Review of Biology, 67, 437–456.Google Scholar
Clutton-Brock, T., & Parker, G. A. (1995). Sexual coercion in animal societies. Animal Behaviour, 49, 1345–1365.Google Scholar
Connor, R. C., & Vollmer, N. L. (2009). Sexual coercion in dolphin consortships: A comparison with chimpanzees. In Muller, M. N. & Wrangham, R. W. (Eds.), Sexual coercion in primates and humans (pp. 218–243). Cambridge, MA: Harvard University Press.Google Scholar
Dahl, J. F., Gould, K. G., & Nadler, R. D. (1993). Testicle size of orang‐utans in relation to body size. American Journal of Physical Anthropology, 90, 229–236.Google Scholar
Daly, M., & Wilson, M. (1983). Sex, evolution, and behavior. Boston: Willard Grant Press.Google Scholar
Delgado, R. A. (2003). The function of adult male long calls in wild orangutans (Pongo pygmaeus). Durham, NC: Duke University.Google Scholar
Delgado, R. A., & van Schaik, C. P. (2000). The behavioral ecology and conservation of the orangutan (Pongo pygmaeus): A tale of two islands. Evolutionary Anthropology, 9, 201–218.Google Scholar
Dixson, A. F. (2018). Copulatory and postcopulatory sexual selection in primates. Folia Primatologica, 89, 258–286.CrossRefGoogle ScholarPubMed
Drea, C. M. (2015). D’scent of man: A comparative survey of primate chemosignaling in relation to sex. Hormones and Behavior, 68, 117–133.Google Scholar
Dunkel, L. P., Arora, N., van Noordwijk, M. A., Utami Atmoko, S. S., Putra, A. P., 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.Google Scholar
Emery Thompson, M. (2009). Human rape: Revising evolutionary perspectives. In Muller, M. N. & Wrangham, R. W. (Eds.), Sexual coercion in primates and humans: An evolutionary perspective on male aggression against females (pp. 346–374). Cambridge, MA: Harvard University Press Cambridge.Google Scholar
Emery Thompson, M., Stumpf, R. M., & Pusey, A. E. (2008). Female reproductive strategies and competition in apes: An introduction. International Journal of Primatology, 29, 815–821.Google Scholar
Emery Thompson, M., Zhou, A., & Knott, C. D. (2012). Low testosterone correlates with delayed development in male orangutans. PLOS ONE, 7, e47282.Google Scholar
Fox, E. A. (1998). The function of female mate choice in Sumatran orangutans (Pongo abelii). Durham, NC: Duke University.Google Scholar
Fox, E. A. (2002). Female tactics to reduce sexual harassment in the Sumatran orangutan (Pongo pygmaeus abelii). Behavioral Ecology and Sociobiology, 52, 93–101.Google Scholar
Galdikas, B. M. F. (1981). Orangutan reproduction in the wild. In Graham, C. E. (Ed.), Reproductive biology of the great apes: Comparative and biomedical perspectives (pp. 281–300). New York: Academic Press.Google Scholar
Galdikas, B. M. F. (1985a). Adult male sociality and reproductive tactics among orangutans at Tanjung Puting. Folia Primatologica, 45, 9–24.Google Scholar
Galdikas, B. M. F. (1985b). Subadult male orangutan sociality and reproductive behavior at Tanjung Puting. American Journal of Primatology, 8, 87–99.CrossRefGoogle ScholarPubMed
Galdikas, B. M. F. (1995). Social and reproductive behavior of wild adolescent female orangutans. In The neglected ape (pp. 163–182). Boston, MA: Springer.Google Scholar
Goossens, B., Setchell, J. M., James, S. S., Funk, S. M., Chikhi, L., Abulani, A. … & Bruford, M. W. (2006). Philopatry and reproductive success in Bornean orangutans (Pongo pygmaeus). Molecular Ecology, 15, 2577–2588.Google Scholar
Henzi, S. P., Clarke, P. M. R., van Schaik, C. P., Pradhan, G. R., & Barrett, L. (2010). Infanticide and reproductive restraint in a polygynous social mammal. Proceedings of the National Academy of Sciences, 107, 2130–2135.Google Scholar
Hrdy, S. B. (1979). Infanticide among animals: A review, classification, and examination of the implications for the reproductive strategies of females. Ethology and Sociobiology, 1, 13–40.Google Scholar
Hrdy, S. B., & Whitten, P. L. (1987). Patterning of sexual behavior. In Smuts, B. B., Cheney, D. L., Seyfarth, R. M., Wrangham, R. W., & Struhsaker, T. T. (Eds.), Primate societies (pp. 370–384). Chicago: University of Chicago Press.Google Scholar
Hume, D. (1739). A treatise of human nature. London: John Noon.Google Scholar
Kinoshita, K., Indo, Y., Tajima, T., Kuze, N., Miyakawa, E., Kobayashi, T., … & Hirata, S. (2021). Comparative analysis of sperm motility in liquid and seminal coagulum portions between Bornean orangutan (Pongo pygmaeus) and chimpanzee (Pan troglodytes). Primates, 62(3), 467–473.Google Scholar
Knott, C. D. (2009). Orangutans: Sexual coercion without sexual violence. In Muller, M. N. & Wrangham, R. W. (Eds.), Sexual coercion in primates and humans (pp. 81–111). Cambridge, MA: Harvard University Press.Google Scholar
Knott, C. D., Emery Thompson, M., Stumpf, R. M., & McIntyre, M. H. (2010). Female reproductive strategies in orangutans, evidence for female choice and counterstrategies to infanticide in a species with frequent sexual coercion. Proceedings of the Royal Society B: Biological Sciences, 277, 105–113.Google Scholar
Knott, C. D., Emery Thompson, M., & Wich, S. A. (2009). The ecology of female reproduction in wild orangutans. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 171–188). Oxford, New York: Oxford University Press.Google Scholar
Knott, C. D., Scott, A. M., DiGiorgio, A., Kane, E. E., Susanto, T. W., & Riyandi, R. (2018). Are female orangutans less efficient foragers because of the risk of sexual coercion? In 27th International Primatological Society Congress, Nairobi.Google Scholar
Knott, C. D., Scott, A. M., O’Connell, C. A., Scott, K. S., Laman, T. G., & Susanto, T. W. (2019). Possible male infanticide in wild orangutans and a re-evaluation of infanticide risk. Scientific Reports, 9, 7806.Google Scholar
Kunz, J. A. (2020). Sexual conflict in orangutans. Zurich: University of Zurich.Google Scholar
Kunz, J. A., Duvot, G. J., van Noordwijk, M. A., Willems, E. P., Townsend, M., Mardianah, N., … & van Schaik, C. P. (2021a). The cost of associating with males for Bornean and Sumatran female orangutans: A hidden form of sexual conflict? Behavioral Ecology and Sociobiology, 75(1), 1–22.Google Scholar
Kunz, J. A., Duvot, G. J., Willems, E. P., Stickelberger, J., Spillmann, B., Atmoko, S. S. U., … & 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.Google Scholar
Leigh, S. R., & Shea, B. T. (1995). Ontogeny and the evolution of adult body size dimorphism in apes. American Journal of Primatology, 36, 37–60.Google Scholar
Lukas, D., & Huchard, E. (2014). The evolution of infanticide by males in mammalian societies. Science, 346, 841–844.Google Scholar
MacKinnon, J. (1974). The behavior and ecology of wild orangutans (Pongo pygmaeus). Animal Behaviour, 22, 3–74.Google Scholar
Maggioncalda, A. N., Sapolsky, R. M., & Czekala, N. M. (1999). Reproductive hormone profiles in captive male orangutans: Implications for understanding developmental arrest. American Journal of Physical Anthropology, 109, 19–32.Google Scholar
Markham, R., & Groves, C. P. (1990). Brief communication: Weights of wild orangutans. American Journal of Physical Anthropology, 81, 1–3.Google Scholar
Marty, P. R., van Noordwijk, M. A., Heistermann, M., Willems, E. P., Dunkel, L. P., Cadilek, M., Agil, M., & Weingrill, T. (2015). Endocrinological correlates of male bimaturism in wild Bornean orangutans. American Journal of Primatology, 77, 1170–1178.Google Scholar
Marzec, A. M., Kunz, J. A., Falkner, S., Atmoko, S. S. U., Alavi, S. E., Moldawer, A. M., … & van Noordwijk, M. A. (2016). The dark side of the red ape: Male-mediated lethal female competition in Bornean orangutans. Behavioral Ecology and Sociobiology, 70, 459–466.Google Scholar
Mitani, J. C. (1985). Sexual selection and adult male orangutan long calls. Animal Behaviour, 33, 272–283.CrossRefGoogle Scholar
Mitra Setia, T., Delgado, R. A., Utami Atmoko, S. S., Singleton, I., & van Schaik, C. P. (2009). Social organization and male–female relationships. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 245–253). Oxford, New York: Oxford University Press.Google Scholar
Mitra Setia, T., & van Schaik, C. P. (2007). The response of adult orangutans to flanged male long calls: Inferences about their function. Folia Primatolica, 78, 215–226.Google Scholar
Morrogh-Bernard, H. C. (2009). Orangutan behavioral ecology in the Sabangau peat-swamp forest. Borneo: University of Cambridge.Google Scholar
Muller, M. N., Emery Thompson, M., Kahlenberg, S. M., & Wrangham, R. W. (2011). Sexual coercion by male chimpanzees shows that female choice may be more apparent than real. Behavioral Ecology and Sociobiology, 65, 921–933.Google Scholar
Muller, M. N., & Wrangham, R. W. (2009). Sexual coercion in primates and humans. Cambridge, MA: Harvard University Press.CrossRefGoogle Scholar
Nadler, R. D. (1981). Laboratory research on sexual behavior of the great apes. In Graham, C. (Ed.), Reproductive biology of the great apes: Comparative and biomedical perspectives (pp. 191–238). New York: Academic Press.Google Scholar
Nietlisbach, P., Arora, N., Nater, A., Goossens, B., van Schaik, C. P., & Krützen, M. (2012). Heavily male-biased long-distance dispersal of orangutans (genus: Pongo), as revealed by Y-chromosomal and mitochondrial genetic markers. Molecular Ecology, 21, 3173–3186.Google Scholar
Nowak, M. G., Rianti, P., Wich, S., Meijide, A., & Fredriksson, G. (2017). Pongo tapanuliensis. The IUCN red list of threatened species 2017: e.T120588639A120588662. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T120588639A120588662.enGoogle Scholar
Nunn, C. L. (1999). The evolution of exaggerated sexual swellings in primates and the graded-signal hypothesis. Animal Behaviour, 58, 229–246.Google Scholar
O’Connell, C. A., Susanto, T. W., & Knott, C. D. (2019). Sociosexual behavioral patterns involving nulliparous female orangutans (Pongo sp.) reflect unique challenges during the adolescent period. American Journal of Primatology, 82(11), e23058.Google Scholar
Palombit, R. A. (2000). Infanticide and the evolution of male–female bonds in animals. In van Schaik, C. P. & Janson, C. H. (Eds.), Infanticide by males and its implications (pp. 239–268). Cambridge: Cambridge University Press.Google Scholar
Palombit, R. A. (2014). Sexual conflict in nonhuman primates. In Advances in the study of behavior, pp. 191–280. Cambridge, MA: Elsevier.Google Scholar
Palombit, R. A. (2015). Infanticide as sexual conflict: Coevolution of male strategies and female counterstrategies. Cold Spring Harbor Perspectives in Biology, 7, a017640.Google Scholar
Parker, G. A. (1979). Sexual selection and sexual conflict. In Blum, M. S. & Blum, N. A. (Eds.), Sexual selection and reproductive competition in insects (pp. 123–166). London: Academic Press.Google Scholar
Parker, G. A., Lessells, C. M., & Simmons, L. W. (2013). Sperm competition games: A general model for precopulatory male–male competition. Evolution: International Journal of Organic Evolution, 67, 95–109.Google Scholar
Pradhan, G. R., van Noordwijk, M. A., & van Schaik, C. P. (2012). A model for the evolution of developmental arrest in male orangutans. American Journal of Physical Anthropology, 149, 18–25.Google Scholar
Pradhan, G. R., & van Schaik, C. P. (2009). Why do females find ornaments attractive? The coercion-avoidance hypothesis. Biological Journal of the Linnean Society, 96, 372–382.Google Scholar
Pusey, A. E. (1980). Inbreeding avoidance in chimpanzees. Animal Behaviour, 28, 543–552.Google Scholar
Rijksen, H. D. (1978). A field study on Sumatran orangutans (Pongo pygmaeus abelii): Ecology, behavior and conservation. Wageningen, Netherlands: Veenman.Google Scholar
Roth, T. S., Rianti, P., Fredriksson, G. M., Wich, S. A., & Nowak, M. G. (2020). Grouping behavior of Sumatran orangutans (Pongo abelii) and Tapanuli orangutans (Pongo tapanuliensis) living in forest with low fruit abundance. American Journal of Primatology, 82, e23123.Google Scholar
Schultz, A. H. (1938). Genital swelling in the female orangutan. Journal of Mammalogy, 19, 363–366.Google Scholar
Schürmann, C. L. (1982). Mating behavior of wild orangutans. In de Boer, L. (Ed.), The orangutan: Its biology and conservation (pp. 269–284). The Hague, Boston, and London: Dr. W. Junk Publishers.Google Scholar
Scott, A. M., Knott, C. D., & Susanto, T. W. (2019). Are male orangutans a threat to infants? Evidence of mother–offspring counterstrategies to infanticide in Bornean orangutans (Pongo pygmaeus wurmbii). International Journal of Primatology, 40, 435–455.Google Scholar
Setchell, J. M. (2008). Alternative reproductive tactics in primates. Cambridge: Cambridge University Press.Google Scholar
Setchell, J. M., & Huchard, E. (2010). The hidden benefits of sex: Evidence for MHC‐associated mate choice in primate societies. Bioessays, 32, 940–948.Google Scholar
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 Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 205–214). Oxford, New York: Oxford University Press.Google Scholar
Singleton, I., & van Schaik, C. P. (2001). Orangutan home range size and its determinants in a Sumatran swamp forest. International Journal of Primatology, 22, 877–911.CrossRefGoogle Scholar
Singleton, I., Wich, S. A., Nowak, M., Usher, G., & Utami Atmoko, S. S. (2018). Pongo abelii (errata version published in 2018). In The IUCN Red List of Threatened Species 2017: e.T121097935A123797627. https://dx.doi.org/10.2305/IUCN.UK.2017-3.RLTS.T121097935A115575085.enGoogle Scholar
Smuts, B. B., & Smuts, R. W. (1993). Male aggression and sexual coercion of females in nonhuman primates and other mammals: Evidence and theoretical implications. Advances in the Study of Behavior, 22, 1–63.Google Scholar
Soltis, J., Thomsen, R., Matsubayashi, K., & Takenaka, O. (2000). Infanticide by resident males and female counter-strategies in wild Japanese macaques (Macaca fuscata). Behavioral Ecology and Sociobiology, 48, 195–202.Google Scholar
Spillmann, B. (2017). Long calls mediate male–male competition in Bornean orangutans: an approach using automated acoustic localization. Zurich: University of Zurich.Google Scholar
Spillmann, B., Dunkel, L. P., van Noordwijk, M. A., Amda, R. N. A., Lameira, A. R., Wich, S. A., & van Schaik, C. P. (2010). Acoustic properties of long calls given by flanged male orang‐utans (Pongo pygmaeus wurmbii) reflect both individual identity and context. Ethology 116, 385–395.Google Scholar
Spillmann, B., Willems, E. P., van Noordwijk, M. A., Mitra Setia, T., & van Schaik, C. P. (2017). Confrontational assessment in the roving male promiscuity mating system of the Bornean orangutan. Behavioral Ecology and Sociobiology, 71, 20.Google Scholar
Stumpf, R. M., Emery Thompson, M., & Knott, C. D. (2008). A comparison of female mating strategies in Pan troglodytes and Pongo spp. International Journal of Primatology, 29, 865–884.Google Scholar
Stumpf, R. M., Martinez-Mota, R., Milich, K. M., Righini, N., & Shattuck, M. R. (2011). Sexual conflict in primates. Evolutionary Anthropology, 20, 62–75.Google Scholar
Sunderland-Groves, J. L., Tandang, M. V., Patispathika, F. H., Marzec, A., Knox, A., Nurcahyo, A., … & Sihite, J. (2020). Suspected Sunda clouded leopard (Neofelis diardi) predation attempts on two reintroduced Bornean orangutans (Pongo pygmaeus wurmbii) in Bukit Batikap Protection Forest, Central Kalimantan, Indonesia. Primates, 62(1), 41–49.Google Scholar
Sussman, R. W., Cheverud, J. M., & Bartlett, T. Q. (1995). Infant killings as evolutionary strategy: Reality or myth? Evolutionary Anthropology, 3, 364–367.Google Scholar
Tajima, T., Malim, T. P., & Inoue, E. (2018). Reproductive success of two male morphs in a free‑ranging population of Bornean orangutans. Primates 59, 127–133.Google Scholar
Thornhill, R., & Palmer, C. T. (2001). A natural history of rape: Biological bases of sexual coercion. Cambridge, MA: MIT Press.Google Scholar
Utami Atmoko, S. S., Goossens, B., Bruford, M. W., De Ruiter, J. R., & van Hooff, J. A. (2002). Male bimaturism success and reproductive success in Sumatran orangutans. Behavioral Ecology, 13, 643–652.Google Scholar
Utami Atmoko, S. S., & Mitra Setia, T. (1995). Behavioral changes in wild male and female Sumatran orangutans (Pongo pygmaeus abelii) during and following a resident male take-over. In Nadler, R. D., Galdikas, B. F. M., Sheeran, L. K., & Rosen, N. (Eds.), The neglected ape (pp. 183–190). Boston, MA: Springer.Google Scholar
Utami Atmoko, S. S., Mitra Setia, T., Goossens, B., James, S. S., Knott, C. D., Morrogh-Bernard, H. C., … & van Noordwijk, M. A. (2009). Orangutan mating behavior and strategies. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 235–244). Oxford, New York: Oxford University Press.Google Scholar
Utami Atmoko, S. S., Singleton, I., van Noordwijk, M. A., van Schaik, C. P., & Mitra Setia, T. (2009a). Male–male relationships in orangutans. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 225–233). Oxford, New York: Oxford University Press.Google Scholar
Utami Atmoko, S. S., & van Hooff, J. A. (2004). Alternative male reproductive strategies: Male bimaturism in orangutans. In Kappeler, P. M. & van Schaik, C. P. (Eds.), Sexual selection in primates: New and comparative perspectives (pp. 196–207). Cambridge: Cambridge University Press.Google Scholar
van Noordwijk, M. A., Arora, N., Willems, E. P., Dunkel, L. P., Amda, R. N. A., Mardianah, N., … & van Schaik, C. P. (2012). Female philopatry and its social benefits among Bornean orangutans. Behavioral Ecology and Sociobiology, 66, 823–834.Google Scholar
van Noordwijk, M. A., Utami Atmoko, S. S., Knott, C. D., Kuze, N., Morrogh-Bernard, H. C., Oram, F., … & Willems, E. P. (2018). The slow ape: High infant survival and long interbirth intervals in wild orangutans. Journal of Human Evolution, 125, 38–49.CrossRefGoogle ScholarPubMed
van Noordwijk, M. A., & van Schaik, C. P. (2000). Reproductive patterns in eutherian mammals: adaptations against infanticide? In van Schaik, C. P. & Janson, C. H. (Eds.), Infanticide by males and its implications (pp. 322–360). Cambridge: Cambridge University Press.Google Scholar
van Schaik, C. P. (1999). The socioecology of fission-fusion sociality in orangutans. Primates, 40, 69–86.Google Scholar
van Schaik, C. P. (2000a). Infanticide by male primates: The sexual selection hypothesis revisited. In van Schaik, C. P. & Janson, C. H. (Eds.), Infanticide by males and its implications (pp. 27–60). Cambridge: Cambridge University Press.Google Scholar
van Schaik, C. P. (2000b). Social counterstrategies against infanticide by males in primates and other mammals. In Kappeler, P. M. (Ed.), Primate males: Causes and consequences of variation in group composition (pp. 34–54). Cambridge: Cambridge University Press.Google Scholar
van Schaik, C. P. (2000c). Vulnerability to infanticide by males: Patterns among mammals. In van Schaik, C. P. & Janson, C. H. (Eds.), Infanticide by males and its implications (pp. 61–72). Cambridge: Cambridge University Press.Google Scholar
van Schaik, C. P. (2004). Among orangutans: Red apes and the rise of human culture. Cambridge, MA: Belknap Press of Harvard University Press.Google Scholar
van Schaik, C. P. (2016). The primate origins of human nature. Hoboken, NJ: John Wiley & Sons.Google Scholar
van Schaik, C. P., Hodges, J. K., & Nunn, C. L. 2000). Paternity confusion and the ovarian cycles of female primates. In van Schaik, C. P. & Janson, C. H. (Eds.), Infanticide by males and its implications (pp. 361–387). Cambridge: Cambridge University Press.CrossRefGoogle Scholar
van Schaik, C. P., & Janson, C. H. (2000). Infanticide by males and its implications. Cambridge: Cambridge University Press.CrossRefGoogle Scholar
van Schaik, C. P., & Kappeler, P. M. (1997). Infanticide risk and the evolution of male–female association in primates. Proceedings of the Royal Society of London Series B Biological Sciences, 264, 1687–1694.Google Scholar
van Schaik, C. P., Marshall, A. J., & Wich, S. A. (2009). Geographic variation in orangutan behavior and biology. In Wich, S. A., Utami Atmoko, S. S., Mitra Setia, T., & van Schaik, C. P. (Eds.), Orangutans: Geographic variation in behavioral ecology and conservation (pp. 351–361). Oxford, New York: Oxford University Press.Google Scholar
van Schaik, C. P., Pradhan, G. R., & van Noordwijk, M. A. (2004). Mating conflict in primates: Infanticide, sexual harassment and female sexuality. In Kappeler, P. M. & van Schaik, C. P. (Eds.), Sexual selection in primates: New and comparative perspectives (pp. 141–163). Cambridge: Cambridge University Press.Google Scholar
Vogel, E. R., Alavi, S. E., Utami‐Atmoko, S. S., van Noordwijk, M. A., Bransford, T. D., Erb, W. M., … & Rothman, J. M. (2017). Nutritional ecology of wild Bornean orangutans (Pongo pygmaeus wurmbii) in a peat swamp habitat: Effects of age, sex, and season. American Journal of Primatology, 79, 1–20.Google Scholar
Wich, S. A., Vogel, E. R., Larsen, M. D., Fredriksson, G., Leighton, M., Yeager, C. P., … & Marshall, A. J. (2011). Forest fruit production is higher on Sumatra than on Borneo. PLOS ONE, 6, e21278.Google Scholar
Wilson, M., & Daly, M. (2009). Coercive violence by human males against their female partners. In Muller, M. N. & Wrangham, R. W. (Eds.), Sexual coercion in primates and humans (pp. 271–391). Cambridge, MA: Harvard University Press.Google Scholar
Wolff, J. O. (2008). Alternative reproductive tactics in nonprimate male mammals. In Oliveira, R. F., Taborsky, M., & Brockmann, H. J. (Eds.), Alternative reproductive tactics: An integrative approach (pp. 356–372). Cambridge: Cambridge University Press.Google Scholar
Wrangham, R. W. (2002). The cost of sexual attraction: Is there a trade-off in female Pan between sex appeal and received coercion? In Boesch, C., Hohmann, G. & Marchand, L. F. (Eds.), Behavioral diversity in chimpanzees and bonobos (pp. 204–215). Cambridge: Cambridge University Press.CrossRefGoogle Scholar
Zeh, J. A., & Zeh, D. W. (2001). Reproductive mode and the genetic benefits of polyandry. Animal Behaviour, 61, 1051–1063.Google Scholar
Zinner, D. P., Nunn, C. L., van Schaik, C. P, & Kappeler, P. M. (2004). Sexual selection and exaggerated sexual swellings of female primates. In Kappeler, P. M. & van Schaik, C. P. (Eds.), Sexual selection in primates: New and comparative perspectives (pp. 71–89). New York: Cambridge University Press.Google Scholar

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