Jacob Negrey

Assistant Professor, Anthropology

I’m a primatologist broadly interested in behavior, disease, and aging. I combine methods from animal behavior, ecology, epidemiology, and physiology to better understand the complex processes underlying primate health. I co-direct the Ngogo Chimpanzee Project, which studies and protects wild chimpanzees living at Ngogo in Kibale National Park, Uganda. To learn more about our research, conservation, and education efforts, check out the Ngogo Chimpanzee Project website.

I also direct the Applied Primate Eco-omics (A.P.E.) Lab at the University of Arizona. Our lab group applies noninvasive “omics” methods (e.g., microbiomics) to tackle ecological questions with relevance for human welfare and nonhuman primate conservation alike. You can learn more about work in the A.P.E. Lab by visiting our website.

Selected publications:

Negrey JD*, Frye BM*, Craft S, Register TC, Baxter MG, Jorgensen MJ, and Shively CA (2024). Executive function mediates age-related variation in social integration in female vervet monkeys (Chlorocebus sabaeus). GeroScience 46(1): 841-852. https://doi.org/10.1007/s11357-023-00820-7. *Equal contributions.

Wood BM, Negrey JD, Brown JL, Deschner T, Emery Thompson M, Gunter S, Mitani JC, Watts DP, and Langergraber KE (2023). Demographic and hormonal evidence for menopause in wild chimpanzees. Science 382(6669): eadd5473. https://doi.org/10.1126/science.add5473

Negrey JD, Deschner T, and Langergraber KE (2023). Lean muscle mass, not aggression, mediates a link between dominance rank and testosterone in wild male chimpanzees. Animal Behaviour 202: 99-109. https://doi.org/10.1016/j.anbehav.2023.06.004

Sandel AA, Negrey JD, Arponen M, Clark IR, Clift JB, Reddy RB, and Ivaska KK (2023). The evolution of the adolescent growth spurt: urinary biomarkers of bone turnover in wild chimpanzees. Journal of Human Evolution 177(1): 103341. https://doi.org/10.1016/j.jhevol.2023.103341

Negrey JD, Emery Thompson M, Dunn CD, Otali E, Wrangham RW, Mitani JC, Machanda ZP, Muller MN, Langergraber KE, and Goldberg TL (2022). Female reproduction and viral infection in a long-lived mammal. Journal of Animal Ecology 91(10): 1999-2009. https://doi.org/10.1111/1365-2656.13799

Negrey JD, Mitani JC, Wrangham RW, Otali E, Reddy RB, Pappas TE, Grindle KA, Gern JE, Machanda ZP, Muller MN, Langergraber KE, Emery Thompson M, and Goldberg TL (2022). Viruses associated with ill health in wild chimpanzees. American Journal of Primatology 84(2): e23358. https://doi.org/10.1002/ajp.23358

Negrey JD, Behringer V, Langergraber KE, and Deschner T (2021). Urinary neopterin of wild chimpanzees indicates that cell-mediated immune activity varies by age, sex, and female reproductive status. Scientific Reports 11(1): 9298. https://doi.org/10.1038/s41598-021-88401-6

Sandel AA, Rushmore J, Negrey JD, Mitani JC, Lyons DM, and Caillaud D (2020). Social network predicts exposure to respiratory infection in a wild chimpanzee group. EcoHealth 17(4): 437-448. https://doi.org/10.1007/s10393-020-01507-7

Negrey JD, Sandel AA, and Langergraber KE (2020). Dominance rank and the presence of sexually receptive females predict feces-measured body temperature in male chimpanzees. Behavioral Ecology and Sociobiology 74(1): 5. https://doi.org/10.1007/s00265-019-2788-3

Negrey JD and Langergraber KE (2020). Corpse-directed play parenting by a sterile adult female chimpanzee. Primates 61(1): 29-34. https://doi.org/10.1007/s10329-019-00734-z

Negrey JD, Reddy RB, Scully EJ, Phillips-Garcia S, Owens L, Langergraber KE, Mitani J, Emery Thompson M, Wrangham RW, Muller MN, Otali E, Machanda Z, Hyeroba D, Grindle KA, Pappas TE, Palmenberg AC, Gern JE, and Goldberg TL (2019). Simultaneous outbreaks of respiratory disease in wild chimpanzees caused by distinct viruses of human origin. Emerging Microbes and Infections 8(1): 139-149. https://doi.org/10.1080/22221751.2018.1563456


Courses taught:

  • ANTH 265: Human Evolution
  • ANTH 369: Darwinian Medicine
  • ANTH 470 / 570: Primate Behavior



My ongoing work with the Ngogo Chimpanzee Project focuses on: 

  • Multisystem aging patterns and their ecological correlates
  • Effects of immune health on behavioral and affective indicators of welfare
  • Human impacts on chimpanzee viral and bacterial communities
  • Physiological predictors of affiliative and agonistic interpersonal relationships


Research interests: 

  • Primatology
  • Infectious disease ecology
  • Animal behavior
  • Aging and diseases of aging
  • Endocrinology
  • Ecophysiology
  • Wildlife conservation