Publications
Journal articles and book chapters
Lappan, S., Morino, L. (2014). Mating in the presence of a competitor: audience effects may promote male social tolerance in polyandrous siamang (Symphalangus syndactylus) groups. Behaviour. 151: 1067-89.
Kim, Y., Ko, E., Lappan, S., Kezele, A., Yoon, Y.D., Choe, J.C. (2013). Changes in fecal estrogen levels and sexual behavior in captive Sichuan snub-nosed monkeys (Rhinopithecus roxellana) following a male replacement. Zoo Biology. 32: 342-6.
Kim, S., Lappan, S., Choe, J. C. (2012). Responses of Javan gibbons (Hylobates moloch) to variation in food availability in the Gunung Halimun-Salak National Park, Indonesia. American Journal of Primatology. 74:1154-67.
Kim, Y., Ko, E., Lappan, S., Kezele, A., Yoon, Y.D., Choe, J.C. (2012) Hormonal correlates of sexual behaviors in captive Sichuan snub-nosed monkeys. Zoo Biology. 32: 342-346.
Kim, S., Lappan, S., Choe, J. C. (2011). Diet and ranging behavior of the endangered Javan gibbon (Hylobates moloch) in a submontane tropical rainforest. American Journal of Primatology.73: 270-280
Lappan, S. (2010). Siamang socioecology in spatiotemporally heterogenous landscapes: Do ‘typical’ groups exist? In S. Gursky & J Supriatna (eds.) Indonesian Primates. New York: Springer. pp. 73-96.
Lappan, S. (2009). Flowers are an important food for small apes in southern Sumatra. American Journal of Primatology. 71: 624-635.
Lappan, S. (2009).The effects of lactation and infant care on adult energy budgets in wild siamangs (Symphalangus syndactylus). American Journal of Physical Anthropology.140: 290-301.
Lappan, S. (2009) Patterns of infant care in wild siamangs (Symphalangus syndactylus). In S Lappan & D Whittaker (eds.) The Gibbons: New Perspectives on Small Ape Socioecology and Population Biology. New York: Springer. pp. 327-346.
Whittaker, D., Lappan, S. (2009). Gibbon diversity and the importance of population-level studies. In S Lappan & D Whittaker (eds.) The Gibbons: New Perspectives on Small Ape Socioecology and Population Biology. New York: Springer. pp 3-12.
Lappan, S. (2008). Male care of infants in a siamang (Symphalangus syndactylus) population including socially monogamous and polyandrous groups. Behavioral Ecology and Sociobiology. 62: 1307-1317.
Lappan, S. (2007). Patterns of dispersal in Sumatran siamangs (Symphalangus syndactylus): preliminary mtDNA evidence suggests more frequent male than female dispersal to adjacent groups. American Journal of Primatology. 69: 692-698.
Lappan, S. (2007). Social relationships among males in multi-male siamang groups. International Journal of Primatology. 28: 368-387.
Edited volume
Lappan, S. and Whittaker, D., editors. (2009). The Gibbons: New Perspectives on Small Ape Socioecology and Population Biology. New York: Springer.
Lappan, S. (2007). Patterns of dispersal in Sumatran siamangs (Symphalangus syndactylus): preliminary mtDNA evidence suggests more frequent male than female dispersal to adjacent groups. American Journal of Primatology. 69: 692-698.
Lappan, S. (2007). Social relationships among males in multi-male siamang groups. International Journal of Primatology. 28: 368-387.
Edited volume
Lappan, S. and Whittaker, D., editors. (2009). The Gibbons: New Perspectives on Small Ape Socioecology and Population Biology. New York: Springer.