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Ian Gilby

Assistant Professor and Research Affiliate, Institute of Human Origins
Faculty, TEMPE Campus, Mailcode 2402
IHO Research Affiliate and Assistant Professor
Faculty, TEMPE Campus, Mailcode 2402
Biography

Ian Gilby has studied the behavioral ecology of wild chimpanzees since 1997. His main research interests are cooperative hunting, meat sharing and adult male dominance strategies. He is co-director of the Gombe Chimpanzee Database, which contains over five decades of detailed behavioral, ecological and demographic data from the long-term study of two chimpanzee communities in Gombe National Park, Tanzania. Before coming to ASU in 2014, he was a Postdoctoral Research Associate in Human Evolutionary Biology at Harvard University, and then a Senior Research Scientist in Evolutionary Anthropology at Duke University.

Education

Ph.D. Zoology, University of Minnesota, 2004

B.A. Biology, Carleton College, 1996

Research Interests

Ian Gilby's research lies at the interface of behavioral ecology and evolutionary anthopology. The broad goal of his research program is to understand the roots of human cooperation using primate behavioral ecology. To date, his work has focused on hunting, meat sharing and social bonds among wild chimpanzees in Gombe National Park (Tanzania) and Kibale National Park (Uganda).

Publications

Lonsdorf, E. V., Gillespie, T.R., Wolf, T.M., Lipende, I., Raphael, J., Bakuza, J., Murray, C.M., Wilson, M.L., Kamenya, S., Mjungu, D., Collins, D.A., Gilby, I.C., Stanton, M.A., Terio, K.A., Barbian, H.J., Li, Y., Ramirez, M., Krupnick, A., Seidl, E., Goodall, J., Hahn, B.H., Pusey, A.E., Travis, D.A. 2017. Socioecological correlates of clinical signs in two communities of wild chimpanzees ( Pan troglodytes ) at Gombe National Park, Tanzania. In press, American Journal of Primatology. DOI: 10.1002/ajp.22562

Wood, B., Gilby, I.C. 2017. From Pan to man the hunter: hunting and meat sharing by chimpanzees, humans, and our common ancestor. In: Chimpanzees and Human Evolution (Ed. by Muller, M.N., Wrangham, R.W., & Pilbeam, D.). pp 339-382. Cambridge: Harvard University Press.

Gilby, I.C., Machanda, Z.P., O’Malley, R.C., Murray, C.M., Lonsdorf, E.V., Walker, K., Mjungu, D.C., Otali, E., Muller, M.N., Emery Thompson, M., Pusey, A.E., Wrangham, R.W. Predation by female chimpanzees: toward an understanding of sex differences in meat acquisition in the last common ancestor of Pan and Homo. Journal of Human Evolution 110: 82-94. DOI: 10.1016/j.jhevol.2017.06.015

Bray, J., Pusey, A.E., Gilby, I.C. 2016. Incomplete control and concessions explain mating skew in male chimpanzees. Proceedings of the Royal Society Series B 283: 20162071. DOI: 10.1098/rspb.2016.2071

Borries, C., Sandel, A.A., Koenig, A., Fernandez-Duque, E., Kamilar, J.M., Amoroso, C., Barton, R.A., Bray, J., Di Fiore, A., Gilby, I.C., Gordon, A.D., Mundry, R., Port, M., Powell, L., Pusey, A.E., Spriggs, A., Nunn, C.L.  2016.Transparency, usability, and reproducibility: guiding principles for improving comparative databases using primates as examples. Evolutionary Anthropology 25: 232-238.

Foerster, S., Franz, M., Murray, C.M., Gilby, I.C., Feldblum, J.T., Walker, K.K., Pusey, A.E. 2016. Chimpanzee females queue but males compete for social status. Scientific Reports 6: 35404.

Stevens, J.R., Marewski, J.N., Schooler, L.J., Gilby, I.C. 2016 Reflections of the social environment in chimpanzee memory: applying rational analysis beyond humans. Royal Society Open Science 3:160293.

O’Malley, R.C., Stanton, M.A., Gilby, I.C., Lonsdorf, E.V., Pusey, A.E., Markham, A.C., Murray, C.M. 2016. Reproductive state and rank influence patterns of meat consumption in wild female chimpanzees (Pan troglodytes schweinfurthii). Journal of Human Evolution 90: 16-28.

Gilby, I.C., Machanda, Z.P., Mjungu, D.C., Rosen, J., Muller, M.N., Pusey, A.E., Wrangham, R.W. 2015. Impact hunters catalyse cooperative hunting in two wild chimpanzee communities. Philosophical Transactions of the Royal Society Series B 370: 20150005.

Foerster, S., McLellan, K., Schroepfer-Walker, K., Murray, C. M., Krupenye, C., Gilby, I.C., Pusey, A. E. 2015. Social bonds in the dispersing sex: partner preferences among adult female chimpanzees. Animal Behaviour 105: 139-152.

Feldblum, J. T., Wroblewski, E. E., Rudicell, R. S., Hahn, B. H., Paiva, T., Cetinkaya-Rundel, M., Pusey, A. E., Gilby, I. C. 2014. Sexually coercive male chimpanzees sire more offspring. Current Biology 24: 2855-2860.

Wilson, M.L., Boesch, C., Fruth, B., Furuichi, T., Gilby, I.C. Hashimoto, C., Hobaiter, C., Hohmann, G., Itoh, N., Koops, K., Lloyd, J., Matsuzawa, T., Mitani, J.C., Mjungu, D.C., Morgan, D., Muller, M.N., Mundry, R., Nakamura, M., Pruetz, J., Pusey, A.E., Riedel, J., Sanz, C., Schel, A., Simmons, N., Waller, M., Watts, D.P., White, F.J., Wittig, R.M., Zuberbühler, K., Wrangham, R.W. 2014. Lethal aggression in Pan is better explained by adaptive strategies than human impacts. Nature 513: 414-417.

Tennie, C., O'Malley, R.C., Gilby, I. C. 2014. Why do chimpanzees hunt? Considering the benefits and costs of acquiring and consuming vertebrate versus invertebrate prey. Journal of Human Evolution 71: 38-45.

Machanda, Z.P., Gilby, I.C., Wrangham, R.W. 2014. Mutual grooming among adult male chimpanzees: The immediate investment hypothesis. Animal Behaviour 87: 165–174.

Miller, J.A., Pusey, A.E., Gilby, I.C., Schroepfer-Walker, K., Markham, A.C., Murray, C.M. 2014. Competing for space: female chimpanzees are more aggressive inside than outside their core areas. Animal Behaviour 87: 147-152.

Machanda, Z.P., Gilby, I.C., Wrangham R.W. 2013. Male-female association patterns among free-ranging chimpanzees (Pan troglodytes schweinfurthii). International Journal of Primatology 34: 917-938.

Gilby, I.C., Wilson, M.L., Pusey, A.E. 2013. Ecology rather than psychology explains co-occurrence of predation and border patrols in male chimpanzees. Animal Behaviour 86: 61-74.

Gilby, I.C., Brent, L.J.N., Wroblewski, E.E., Rudicell, R.S., Hahn, B.H., Goodall, J., Pusey, A.E. 2013. Fitness benefits of coalitionary aggression in male chimpanzees. Behavioral Ecology and Sociobiology 67: 373-381.

Crofoot, M.C., Gilby, I.C.  2012. Cheating monkeys undermine group strength in enemy territory. Proceedings of the National Academy of Sciences, USA 109: 501-505.

Gilby, I.C. 2012. Nonkin cooperation: reciprocity, markets and mutualism. In: Evolution of Primate Societies (Ed. by Mitani, J., Call, J., Kappeler, P., Palombit, R., & Silk, J.). pp 514-530. Chicago, IL: University of Chicago Press.

Pintea, L., Pusey, A.E., Wilson, M.L., Gilby, I.C., Collins, D.A., Kamenya, S., Goodall, J. 2012. Long-term ecological changes affecting the chimpanzees of Gombe National Park, Tanzania. In: Long Term Changes in Africa’s Rift Valley: impacts on biodiversity and ecosystems (Ed. by Plumptre, A.J.). pp 194-210. New York: Nova Science Publishers.

Lonsdorf, E.V., Murray, C.M., Lonsdorf, E.V., Travis, D.A., Gilby, I.C. Chosy, J., Pusey, A.E., Goodall, J. 2011. A retrospective analysis of factors correlated to chimpanzee (Pan troglodytes schweinfurthii) respiratory health at Gombe National Park. EcoHealth 8:26-35.

Gilby, I.C., Emery Thompson, M., Ruane, J., Wrangham, R.W. 2010. No evidence of short-term exchange of meat for sex among chimpanzees. Journal of Human Evolution 59: 44-53.

Gilby, I.C., Pokempner, A. A., Wrangham, R. W. 2010. A direct comparison of scan and focal sampling methods for measuring wild chimpanzee feeding behaviour. Folia Primatologica 81: 254-264.

Gilby, I.C., Connor, R.C. 2010. The role of intelligence in group hunting: Are chimpanzees different from other social predators? In: The Mind of the Chimpanzee: Ecological and Experimental Perspectives (Ed. by Lonsdorf, E. V., Ross, S. R. & Matsuzawa, T.). pp 220-233. Chicago, IL: University of Chicago Press.

Foster, M.W., Gilby, I.C., Murray, C.M., Johnson, A., Wroblewski, E.E., Pusey, A.E. 2009. Alpha male chimpanzee grooming patterns: implications for dominance ‘style’. American Journal of Primatology 71: 136-144.

Tennie, C., Gilby, I.C., Mundry, R. 2009. The meat-scrap hypothesis: small quantities of meat may promote cooperative hunting in wild chimpanzees. Behavioral Ecology and Sociobiology 63: 421-431.

Gilby, I.C., Wrangham, R.W. 2008. Association patterns among wild chimpanzees (Pan troglodytes schweinfurthii) reflect sex differences in cooperation. Behavioral Ecology and Sociobiology 62: 1831-1842.

Gilby, I.C., Eberly, L.E., Wrangham, R.W. 2008. Economic profitability of social predation among wild chimpanzees: individual variation promotes cooperation. Animal Behaviour 75: 351-360.

Crofoot, M.C., Gilby, I.C., Wikelski, M.C., Kays, R.W. 2008. Interaction location outweighs the competitive advantage of numerical superiority in Cebus capucinus intergroup contests. Proceedings of the National Academy of Sciences, USA 105: 577-581.

Murray C.M., Gilby I.C., Mane S.V., Pusey A.E. 2008 Adult male chimpanzees inherit maternal ranging patterns. Current Biology 18: 20-24.

Wrangham, R.W., Crofoot M.C., Lundy R., Gilby I.C. 2007. Use of overlap zones in group-living primates: a test of the risk hypothesis. Behaviour 144: 1599-1619.

Gilby, I.C., Wrangham, R.W. 2007. Risk-prone hunting by chimpanzees (Pan troglodytes schweinfurthii) increases during periods of high diet quality. Behavioral Ecology and Sociobiology 61: 1771-1779.

Emery Thompson, M., Kahlenberg, S.M., Gilby, I.C., Wrangham, R.W. 2007. Within-community variation in habitat quality accounts for variance in reproductive success among female chimpanzees at Kibale National Park, Uganda. Animal Behaviour 73: 501-512.

Gilby, I.C., Eberly, L.E., Pintea, L., Pusey, A.E. 2006. Ecological and social influences on the hunting behaviour of wild chimpanzees, Pan troglodytes schweinfurthii. Animal Behaviour 72: 169-180.

Gilby, I.C. 2006. Meat sharing among the Gombe chimpanzees: Harassment and reciprocal exchange. Animal Behaviour 71: 953-963.

Stevens, J.R. Gilby, I.C. 2004. A conceptual framework for non-kin food sharing: timing and currency of benefits. Animal Behaviour 67: 603-614.

 

 

Fall 2017
Course NumberCourse Title
ASM 443Primatology
ASB 484Internship
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASB 499Individualized Instruction
ASM 543Primatology
ASB 580Practicum
ASB 584Internship
ASB 590Reading and Conference
ASB 592Research
ASB 790Reading and Conference
ASB 792Research
ASB 799Dissertation
Spring 2017
Course NumberCourse Title
ASM 104Bones, Stones/Human Evolution
ASB 484Internship
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASB 499Individualized Instruction
ASB 580Practicum
ASB 590Reading and Conference
ASB 592Research
ASB 790Reading and Conference
ASB 792Research
ASB 799Dissertation
Fall 2016
Course NumberCourse Title
ASB 210Human Sexuality: Anth Perspect
ASB 484Internship
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASB 499Individualized Instruction
ASB 580Practicum
ASB 584Internship
ASM 590Reading and Conference
ASB 590Reading and Conference
ASM 592Research
ASB 592Research
ASM 790Reading and Conference
ASB 790Reading and Conference
ASM 792Research
ASB 792Research
ASM 799Dissertation
ASB 799Dissertation
Summer 2016
Course NumberCourse Title
ASM 104Bones, Stones/Human Evolution
Spring 2016
Course NumberCourse Title
ASM 104Bones, Stones/Human Evolution
ASB 484Internship
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASB 499Individualized Instruction
ASB 580Practicum
ASB 590Reading and Conference
ASB 592Research
ASB 790Reading and Conference
ASB 792Research
ASB 799Dissertation
Fall 2015
Course NumberCourse Title
ASM 443Primatology
ASB 484Internship
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASM 499Individualized Instruction
ASB 499Individualized Instruction
ASM 543Primatology
ASB 580Practicum
ASB 584Internship
ASM 590Reading and Conference
ASB 590Reading and Conference
ASM 592Research
ASB 592Research
ASM 790Reading and Conference
ASB 790Reading and Conference
ASM 792Research
ASB 792Research
ASM 799Dissertation
ASB 799Dissertation
Spring 2015
Course NumberCourse Title
ASB 484Internship
ASM 484Internship
ASB 493Honors Thesis
ASM 493Honors Thesis
ASM 497Honors Colloquium
ASB 499Individualized Instruction
ASM 499Individualized Instruction
ASB 580Practicum
ASM 590Reading and Conference
ASB 590Reading and Conference
ASM 591Seminar
ASM 592Research
ASB 592Research
ASM 790Reading and Conference
ASB 790Reading and Conference
ASM 792Research
ASB 792Research
ASM 799Dissertation
ASB 799Dissertation
Fall 2014
Course NumberCourse Title
ASM 300Anthropological Sciences Sem
ASM 484Internship
ASB 484Internship
ASM 492Honors Directed Study
ASB 492Honors Directed Study
ASB 493Honors Thesis
ASM 499Individualized Instruction
ASB 580Practicum
ASB 584Internship
ASB 590Reading and Conference
ASM 590Reading and Conference
ASB 592Research
ASM 592Research
ASB 790Reading and Conference
ASM 790Reading and Conference
ASM 792Research
ASB 792Research
ASM 799Dissertation
ASB 799Dissertation
Spring 2014
Course NumberCourse Title
ASB 484Internship
ASM 484Internship
ASB 492Honors Directed Study
ASM 492Honors Directed Study
ASB 493Honors Thesis
ASM 493Honors Thesis
ASB 499Individualized Instruction
ASM 499Individualized Instruction
ASB 580Practicum
ASB 590Reading and Conference
ASM 590Reading and Conference
ASB 592Research
ASM 592Research
ASB 790Reading and Conference
ASM 790Reading and Conference
ASM 792Research
ASB 792Research
ASM 799Dissertation
ASB 799Dissertation
Professional Associations

American Association of Physical Anthropologists International Primatological Society Sigma Xi, The Scientific Research Society

Service
  • SHESC Faculty Honors Advisor
  • SHESC Undergraduate Researc Committee