Publications

Howe ME, YE Essandoh, K Romanak, C Xia, G Brenes Alvarado, MD Wasserman, AS Wiley, M Venier. 2025. Determinants of Pesticide Exposure Among Girls in Rural Costa Rica: A Silicone Wristband Study. Environmental Pollution 126577 https://doi.org/10.1016/j.envpol.2025.126577

Steiniche T, W Green, R Mutegeki, CA Chapman, RW Wrangham, JM Rothman, M Venier, MD Wasserman. 2025. Exposure and hormone associations of pesticides and flame retardants among primates in Uganda. Environmental Toxicology and Chemistry vgaf130. https://doi.org/10.1093/etojnl/vgaf130

Chusyd DE, E Chester, T Steiniche, SL Dickinson, B Ortyl, S Paris, N Boisseau, MD Wasserman, JL Brown. 2025. Comparison of methods for faecal hormone preservation and analysis in African savanna elephants under field conditions. Conservation Physiology 13:coaf026. https://doi.org/10.1093/conphys/coaf026

Chusyd DE, JL Brown, S Paris, N Boisseau, W Mwaanga, M Kasongo, L Olivier, SL Dickinson, B Ortyl, T Steiniche, SN Austad, DB Allison, MD Wasserman. 2025. Fecal glucocorticoid metabolite and T3 profiles of orphaned elephants differ from non-orphaned elephants in Zambia. PeerJ 13:e19122. https://doi/org/10.7717/peerj.19122

Essandoh YE, T Steiniche, C Xia, K Romanak, J Ogwang, R Mutegeki, MD Wasserman, M Venier. 2025. Tracking toxic chemical exposure in Uganda: Insights from silicone wristbands. Environmental Research 121522. https://doi.org/10.1016/j.envres.2025.121522

Wasserman MD, ML Després-Einspenner, R Mutegeki, T Steiniche. 2024. Hormonally Active Phytochemicals in Primate Diets: Prevalence Across the Order. In: J.E. Lambert, M.A.H. Bryer, and J.M. Rothman (Eds.). How Primates Eat: A Synthesis of Nutritional Ecology across a Mammal Order. University of Chicago Press, Chicago. https://doi.org/10.7208/chicago/9780226829746-013

Ehrie AJ, AA Iruri-Tucker, YB Lord, KD Hunt, PD Polly, AM Fudikar, MD Wasserman. 2024. Measuring mantled howler monkey (Alouatta palliata) testes via parallel laser photogrammetry: Expanding the use of non-invasive methods. American Journal of Primatology: e23616. https://doi.org/10.1002/ajp.23616

Wasserman MD, ML Després-Einspenner, R Mutegeki, T Steiniche. 2024. Endocrine-Active Phytochemicals in Primate Diets: Prevalence Across the Order. In: J.E. Lambert and J.M. Rothman (Eds.). How Primates Eat: A Synthesis of Nutritional Ecology across a Mammal Order. University of Chicago Press, Chicago. https://doi.org/10.7208/chicago/9780226829746-fm

Schreier AL, CE Johnson, MD Wasserman, LM Bolt. 2024. Mantled howler monkey (Alouatta palliata) demographic structure in a continuous forest compared to a small forest fragment in Costa Rica. Primate Conservation 37: 35-44. http://www.primate-sg.org/storage/pdf/PC37_Schreier_et_al_A_palliata_demographics.pdf

Johnson CE, AL Schreier, OV Ramírez, MD Wasserman. 2023. The mantled howler monkey (Alouatta palliata) population at La Selva Research Station, Costa Rica: Comparing censuses in 1992 and 2022. International Journal of Primatology. https://doi.org/10.1007/s10764-023-00409-z

Johnson CE, KA Tafoya, P Beck, A Concilio, KE White, R Quirós, MD Wasserman. 2023. Primate richness and abundance is driven by both forest structure and conservation scenario in Costa Rica. PLOS ONE. 18(9): e0290742. https://doi.org/10.1371/journal.pone.0290742

Steiniche T, S Wang, E Chester, R Mutegeki, JM Rothman, R Wrangham, C Chapman, M Venier, MD Wasserman. 2023. Associations between fecal chemical pollutants and hormones in primates inhabiting Kibale National Park, Uganda. Biology Letters.https://doi.org/10.1098/rsbl.2023.0005

Beehner JC, J Alfaro, C Allen, ME Benítez, TJ Bergman, MS Buehler, SC Carrera, EM Chester, T Deschner, A Fuentes, CM Gault, I Godoy, KM Jack, JD Kim, L Kolinsky, NK Kulick, T Losch, JC Ordoñez, SE Perry, F Pinto, OT Reilly, E Tinsley Johnson, MD Wasserman. 2022. Using an on-site laboratory for fecal steroid analysis in wild white-faced capuchins. General & Comparative Endocrinology 329: 114109. https://doi.org/10.1016/j.ygcen.2022.114109.

Chapman CA, T Steiniche, KM Benavidez, D Sarkar, K Amato, JC Serio Silva, M Venier, MD Wasserman. 2022. The chemical landscape of tropical mammals in the Anthropocene. Biological Conservation 269: 109522. https://doi.org/10.1016/j.biocon.2022.109522.

Wasserman MD, B Wing, N Bickford, K Hobbs, P Dijkstra, J Carr. 2021. A universal theory of biological stress. Integrative & Comparative Biology: icab113. https://doi.org/10.1093/icb/icab113.

Lim JY*, MD Wasserman*, J Veen, ML Després-Einspenner, WD Kissling. *shared first authorship. 2021. Ecological and evolutionary significance of primates’ most consumed plant families. Proceedings of the Royal Society B: Biological Sciences 288: 20210737. https://doi.org/10.1098/rspb.2021.0737.

Wang S, T Steiniche, JM Rothman, RW Wrangham, CA Chapman, R Mutegeki, R Quirós, MD Wasserman, and M Venier. 2020. Feces are effective biological samples for measuring pesticides and flame retardants in primates. Environmental Science & Technology 54: 12013-12023. https://doi.org/10.1021/acs.est.0c02500.

Tafoya KA, E Brondízio, CE Johnson, P Beck, M Wallace, R Quirós, and MD Wasserman. 2020. Effectiveness of Costa Rica’s conservation portfolio to lower deforestation, protect primates, and increase community participation. Frontiers in Environmental Science 8: e580724. https://doi.org/10.3389/fenvs.2020.580724.

Chester EM, E Fender, MD Wasserman. Screening for Phytoestrogens using a Cell-based Estrogen Receptor β Reporter Assay. 2020. Journal of Visualized Experiments: e61005. https://doi.org/10.3791/61005.

Rich AM, MD Wasserman, KD Hunt, and FA Kaestle. 2020. Chimpanzee (Pan troglodytes schweinfurthii) population spans multiple protected areas in the Albertine Rift. Folia Primatologica. https://doi.org/10.1159/000508073.

Rich A, S Poindexter, A Lai, T Steiniche, R Mutegeki, MD Wasserman. 2020. A Camera Trap Survey in a Protected Forest with Potential for Landscape Connectivity across Western Uganda. African Journal of Ecology. https://doi.org/10.1111/aje.12722.

Benavidez KM, A Iruri-Tucker, T Steiniche, and MD Wasserman. 2019. Primate microbial endocrinology: An uncharted frontier. American Journal of Primatology 81: e23053. https://doi.org/10.1002/ajp.23053.

Beck P, R Quirós, CE Johnson, MD Wasserman. 2019. Biological research stations as central nodes in promoting North-South collaborative networks for teaching and research. Current Opinions in Environmental Sustainability 39: 31-38. https://doi.org/10.1016/j.cosust.2019.06.007

Wang S, T Steiniche, KA Romanak, CE Johnson, R Flores, R Mutegeki, MD Wasserman, and M Venier. 2019. Occurrence of legacy pesticides, current use pesticides, and flame retardants in and around protected areas in Costa Rica and Uganda. Environmental Science & Technology 53: 6171-6181. https://doi.org/10.1021/acs.est.9b00649

Benavidez KM, CA Chapman, DC Leitman, TA Harris, and MD Wasserman. 2019. Seasonal and intergroup variation in estrogenic plant consumption by black-and-white colobus monkeys. African Journal of Ecology 57: 429-436. https://doi.org/10.1111/aje.12609

Rich AM, MD Wasserman, C Deimel, SK Breeden, FA Kaestle, KD Hunt. 2018. Is genetic drift to blame for testicular dysgenesis syndrome in Semliki chimpanzees (Pan troglodytes schweinfurthii)? Journal of Medical Primatology 47: 257-269. https://doi.org/10.1111/jmp.12352

Gogarten JF, Jacob AL, Ghai RR, Rothman JM, Twinomugisha D, Wasserman MD, and Chapman CA. 2015. Causes and consequences of changing group sizes in a primate community over 15+ years. Biotropica 47: 101-112. https://doi.org/10.1111/btp.12177

Gogarten, J.F, T.R. Bonnell, L.M. Brown, M. Campenni, M.D. Wasserman, and C.A. Chapman. 2014. Increasing group size alters behavior of a folivorous primate. International Journal of Primatology 35: 590-608. https://doi.org/10.1007/s10764-014-9770-8

Twinomugisha, D., M.D. Wasserman, and C.A. Chapman. 2014. Deriving conservation status for a high altitude population: Golden monkeys of Mgahinga Gorilla National Park, Uganda. In: N.B. Grow, S. Gursky-Doyen, and A. Krzton (Eds.). High Altitude Primates. Springer Press, New York, pp. 227-243. https://doi.org/10.1007/978-1-4614-8175-1_13

Wasserman, M.D., K. Milton, and C.A. Chapman. 2013. The roles of phytoestrogens in primate ecology and evolution. International Journal of Primatology 34: 861-878. https://doi.org/10.1007/s10764-013-9699-3

Wasserman, M.D., C.A. Chapman, K. Milton, T.L. Goldberg, and T.E. Ziegler. 2013. Physiological and behavioral effects of capture darting on red colobus (Procolobus rufomitratus) with a comparison to chimpanzee (Pan troglodytes) predation. International Journal of Primatology 34: 1020-1031. https://doi.org/10.1007/s10764-013-9711-y

Bonnell, T., M. Campennì, C.A. Chapman, J.F. Gogarten, R.A. Reyna-Hurtado, J.A. Teichroeb, M.D. Wasserman, and R. Sengupta. 2013. Emergent group level navigation: an agent-based evaluation of movement patterns in a folivorous primate. PLOS ONE 8: e78264. https://doi.org/10.1371/journal.pone.0078264

Chapman, C.A., R.R. Ghai, R. Reyna-Hurtado, A.L. Jacob, S.M. Koojo, J.M. Rothman, D. Twinomugisha, M.D. Wasserman, and T.L. Goldberg. 2013.  Going, going, gone: A 15-year history of the decline in abundance of primates in forest fragments.  In: L.K. Marsh & C.A. Chapman (Eds.).  Primates in Fragments: Complexity and Resilience.  Springer Press. https://doi.org/10.1007/978-1-4614-8839-2_7

Marsh, L.K., C.A. Chapman,  V. Arroyo-Rodriguez, A.K. Cobden,  J. Dunn, D. Gabriel, R.R. Ghai, V. Nijman, R. Reyna-Hurtado, J.C. Serio-Silva, and M.D. Wasserman. 2013. Primates in fragments 10 years later: Once and future goals. In: L.K. Marsh & C.A. Chapman (Eds.).  Primates in Fragments: Complexity and Resilience.  Springer Press. https://doi.org/10.1007/978-1-4614-8839-2_34

Chapman, C.A., T.R. Bonnell, J.F. Gogarten, J.E. Lambert, P.A. Omeja, D. Twinomugisha, M.D. Wasserman, and J.M. Rothman. 2013. Are primates ecosystem engineers? International Journal of Primatology 34: 1-14. https://doi.org/10.1007/s10764-012-9645-9

Wasserman, M.D., C.A. Chapman, K. Milton, J.F. Gogarten, D.J. Wittwer, and T.E. Ziegler. 2012. Estrogenic plant consumption predicts red colobus monkey (Procolobus rufomitratus) hormonal state and behavior. Hormones and Behavior 62: 553-562. https://doi.org/10.1016/j.yhbeh.2012.09.005

Wasserman, M.D., A. Taylor-Gutt, J.M. Rothman, C.A. Chapman, K. Milton, and D.C. Leitman. 2012. Estrogenic plant foods of red colobus monkeys and mountain gorillas in Uganda. American Journal of Physical Anthropology 148:88-97. https://doi.org/10.1002/ajpa.22045

Rothman, J.M., C.A. Chapman, D. Twinomugisha, M.D. Wasserman, J.E. Lambert, and T.L. Goldberg.  2008. Measuring physical traits of primates remotely: the use of parallel lasers. American Journal of Primatology 70: 1191-1195. https://doi.org/10.1002/ajp.20611

Snaith,T.V., C.A. Chapman, J.M. Rothman, and M.D. Wasserman. 2008. Bigger groups have fewer parasites and similar cortisol levels: a multi-group analysis in red colobus monkeys. American Journal of Primatology 70: 1072-1080. https://doi.org/10.1002/ajp.20601

Chapman, C.A., L. Naughton-Treves, M.J. Lawes, M.D. Wasserman, and T.R. Gillespie. 2007. Population declines of colobus in western Uganda and conservation value of forest fragments. International Journal of Primatology 28: 513-528. https://doi.org/10.1007/s10764-007-9142-8

Chapman, C.A., M.D. Wasserman, T.R. Gillespie, M.L. Speirs, M.J. Lawes, T.L. Saj, and T.E. Ziegler. 2006. Do nutrition, parasitism, and stress have synergistic effects on red colobus populations living in forest fragments? American Journal of Physical Anthropology 131: 525-534. https://doi.org/10.1002/ajpa.20477

Chapman, C.A., M.D. Wasserman, and T.R. Gillespie. 2006. Behavioural patterns of colobus in logged and unlogged forests:  The conservation value of harvested forests.  In: E. Newton-Fisher, H. Notman, V. Reynolds, J.D. Patterson (eds.).  Primates of Western Uganda. Pp. 373-390. Springer, New York. https://doi.org/10.1007/978-0-387-33505-6_21

Chapman, C.A., T. Webb, R. Fronstin, M.D. Wasserman, and A.M. Santamaria. 2005. Assessing dietary protein of colobus monkeys through fecal sample analysis: A tool to evaluate habitat quality. African Journal of Ecology 43: 276-278. https://doi.org/10.1111/j.1365-2028.2005.00575.x

Wasserman, M.D., and Chapman, C.A. 2003. Determinants of colobine monkey abundance: The importance of food energy, protein and fiber content. Journal of Animal Ecology 72: 650-659. https://doi.org/10.1046/j.1365-2656.2003.00736.x