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Mielke et al. Many morphs: Parsing gesure signals from the noise. Behavioural Research Methods


Phillips, S., Piel, A.K., Stewart, F.A., Oelze, V.  A chimpanzee's time to feast: Seasonality of Macrotermes flight hole activity and alate dispersal flights detected by termite-fishing experiments and camera traps in the Issa Valley, Tanzania. Frontiers Ecol Evol. In press.

Baker, S., Stewart, F.A.,Piel, A.K.A case of suspected chimpanzee scavenging in the Issa Valley, Tanzania. Primates. 


Drummond--Clarke, R., Fryns, C., Stewart, F.A., Piel A.K. A case of intercommunity lethal aggression by chimpanzees in an open and dry landscape, Issa Valley, western Tanzania. Primates.

Thomsen, S., Loos, J., Stewart, F.A., Piel, A.K. Wildlife habitat association over a twelve-year period (2008-2020) in the Greater Mahale Ecosystem, western Tanzania. J for Nature Conservation.

Bonnin et al. Barriers to chimpanzee gene flow at the south-east edge of their distribution. Molecular Ecology.

Wich et al. Using Drones to Determine Chimpanzee Absences at the Edge of Their Distribution in Western Tanzania. Remote Sensing

Fornof, L., Stewart, F.A., Piel, A.K. Multiple antipredator behaviors in red-tailed monkeys reveal spatially distinct landscapes of fear. Behav Ecology.



Drummond-Clarke et al. Wild chimpanzee behavior suggests that a savanna-mosaic habitat did not support the emergence of hominin terrestrial bipedalism. Science AdvancesDOI: 10.1126/sciadv.add9752

Naftal et al. Spatial and temporal pattern of wildfires in the MasitoUgalla Ecosystem (2008-2019), Tanzania. IOSR Journal of Environmental Science, Toxicology, and Food Technology (IOSR-JESTFT). DOI: 10.9790/2402-1607021219


Scully et al. The ecology and epidemiology of malaria parasitism in wild chimpanzee reservoirs. Comm Biology

Westworth et al. Understanding External Influences on Target Detection and Classification Using Camera Trap Images and Machine Learning. Sensors


Carvalho et al. Spatio-temporal changes in chimpanzee density and abundance in the Greater Mahale Ecosystem, Tanzania. Ecological Applications.


Fontsere et al. Population dynamics and genetic connectivity in recent chimpanzee history. Cell Genomics. DOI:


Crunchant, A., Isaacs, J., Piel, A.K. Localising wild chimpanzees with passive acoustics. Ecology and EvolutionDOI: 10.1002/ece3.8902

D'Ammando, G., Caro, T., Oelze, V., Phillips, S., Sime, P., Stewart, F.A., Piel, A.K. Ecological drivers of habitat use by meso mammals in a miombo ecosystem in the Issa Valley, Tanzania. Frontiers Ecol Evol.

Mason, B., Piel, A.K., Modrý, D., Petrželková, K.J., Stewart, F.A., Pafčo, B.Association of human disturbance and gastrointestinal parasite infection of yellow baboons in western Tanzania. PLoS ONE.


Carvalho et al. Using nonhuman culture in conservation requires careful and concerted action. Conservation Letters

Giuliano, G., Stewart, F.A., Piel, A.K.  Chimpanzee (Pan troglodytes schweinfurthii) grouping patterns in an open and dry savanna landscape, Issa Valley, Western Tanzania. J Human Evol.


Fryns et al. Interactions between chimpanzees (Pan troglodytes schweinfurthii) and cattle (Bos taurus) in the Issa Valley, Western Tanzania. African Primates. [Here].

Crunchant, A., Stewart, F.A., Piel, A.K. Vocal communication in wild chimpanzees: a call rate study. PeerJ.

Lindshield et al. Chimpanzees (Pan troglodytes) in savanna landscapes.Evol Anthropol.

Barratt et al. Quantitative estimates of glacial refugia for chimpanzees (Pan troglodytes) since the Last Interglacial (120,000 BP). American J Primatology

Bueno de Mesquita et al. Structure of Chimpanzee Gut Microbiomes across Tropical Africa. mSystems


Carvalho et al. Predicting range shifts of African apes under global change scenarios. Densirty and Distributions      

Russell et al. CD4 receptor diversity represents an ancient protection mechanism against primate lentiviruses. PNAS.

Lester et al. Recent genetic connectivity and clinal variation in chimpanzees. Comm Biol.

Amato, K. et al.Fermented food consumption in wild nonhuman primates and its ecological drivers. Amer J Phys Anthropo.

Chitayat, A., Wich, S.A. Lewis, M., Stewart, F., Piel, A.K. Ecological correlates of chimpanzee (Pan troglodytes schweinfurthii) density in Mahale Mountains National Park, Tanzania. PLoS ONE,

Phillips, S., Scheffrahan R.H., Piel, A.K. Stewart, F., Agbor, A., Brazzola, G., Tickle, A., Sommer, V., Dieguez, P., Wessling, E.G., Arandjelovic, M., Kuhl, H., Boesch, C., Oelze, V.M. Limited evidence of C4 plant consumption in mound building Macrotermes termites from savanna woodland chimpanzee sites. PLoS ONE,


Hernandez-Aguilar, R., Reitan, T. Deciding Where to Sleep: Spatial Levels of Nesting Selection in Chimpanzees (Pan troglodytes) Living in Savanna at Issa,Tanzania. Int’l Primatol,

Fontsere, C., Alvarez-Estape, M.,Lester J., Arandjelovic, M., Kuhlwilm, M., Dieguez, P., Agbor, A., Angedakin, A., Ayuk Ayimisin, E., Bessone, M., Brazzola, G., Deschner, T., Eno-Nku, M., Granjon, A., Head, J., Kadam, P., Kalan, A.K., Kambi, M., Langergraber, K., Lapuente, J., Maretti, G., Jayne Ormsby, L., Piel, A., Robbins, M., Stewart, F., Vergnes, V., Wittig, R.M., McElreath, R., Kühl, H.S., Marques-Bonet, T., Hughes, D.A., and Lizano, E. Maximizing the acquisition of unique reads in non-invasive capture sequencing experiments. Mole Evol Resources.DOI: 10.1111/1755-0998.13300. [Link]

Bonnin, N., Stewart, F.A., Wich, S.A., Belis, J., Chitayat, A., Dickson, R., Ingram, R., Jantz, S.M., Moore, R., Pintea, L., Piel, A.K. Modelling landscape connectivity change for chimpanzee conservation in Tanzania. Biol Cons, [Link].


Dickson, R., Baker, M., Bonnin, N., Shoch, D., Rifkin, B., Stewart, F.A., Piel, A.K. Combining Deforestation and Species Distribution Models to Improve Measures of Chimpanzee Conservation Impacts of REDD: A Case Study from Ntakata Mountains, Western Tanzania. Forests, [Link].

Mayengo, G., Armbruster., Treydte, A. Quantifying nutrient re-distribution from nutrient hotspots

using camera traps, indirect observation and stable isotopes in a miombo ecosystem, Tanzania. Global Ecology and Conservation. [Link]

Maijo, S., Piel, A.K. Tredye, A. Anthropogenic disturbance and chimpanzee (Pan troglodytes schweinfurthii) habitat use in Masito-Ugalla Ecosystem, Tanzania. J Mammal.  [PDF]

Kalan et al. Environmental variability supports chimpanzee behavioural diversity. Nat Comm. [PDF]


Lile, C., McLester, E., Stewart, F.A., Piel, A.K. Red-tailed monkeys (Cercopithecus ascanius) prey upon and mob birds in the Issa Valley, western Tanzania. Primates. [PDF]


Boesch et al. Chimpanzee ethnography reveals unexpected cultural diversity. Nature Human Behaviour.     [PDF] 

Mayengo, G., Piel, A.K., Treydte, A. The importance of nutrient hotspots for grazing ungulates in a Miombo ecosystem, Tanzania. PLoS ONE journal.pone.0230192 [PDF].

Vink, D., Stewart, F.A., Piel, A.K. Comparing methods for assessing chimpanzee (Pan troglodytes schweinfurthii) party size: observations, camera traps and bed counts from a savanna-woodland mosaic in the Issa valley, Tanzania. Int’l Primatol [PDF].

Crunchant, A., Borchers, D., Kuehl, H., Piel, A.K. Listening and watching: do camera traps or acoustic sensors more efficiently detect wild chimpanzees in an open habitat? Methods Ecol Evol. [PDF]


McLester, Pintea, L., Stewart, F., Piel, A.K. Cercopithecine and Colobine Abundance Across Protected and Unprotected Land in the Greater Mahale Ecosystem. Int’l J Primatol. 



Chitayat, A, Lewis, M., Stewart, F.A., Piel, A.K. Chimpanzee Census: Mahale Mountains National Park. TAWIRI Scientific Conference. Arusha, 4-6 December 2019.

McLester, E., Brown, M., Stewart, F., Piel, A.K. Food abundance and weather influence habitat-specific ranging patterns in forest- and savanna mosaic-dwelling red-tailed monkeys (Cercopithecus ascanius). Amer J Phys Anthropo, DOI: 10.1002/ajpa.23920. [PDF]

Piel, A.K., Lile, C. Monkeying around in a Mosaic: Red-tailed Monkeys in the Issa Valley, Western Tanzania. Zool Asso. America, 13(2):11-13. [PDF]

Kuhl et al. (A reply to Hockings and McLennan) Inclusive chimpanzee conservation. Science[PDF]

Kuhl et al., Human impact erodes chimpanzee behavioural diversity. Science[LINK]

Marchant, L. Piel, A.K., Stewart, F.A. Revisiting the savanna chimpanzee (Pan troglodytes) as a referential model for hominin origins: Issa, Tanzania as a case study (abstract). 88th Annual Meeting Amer Soc Phys Anthropol. Clevland, USA. April 2019. [Link]

Hambrecht, L., Brown, R.P., Piel, A.K, and Wich, S.A. Detecting  ‘poachers’ with drones: Factors influencing the probability of detection with TIR and RGB imaging in miombo woodlands, Tanzania. Biol Cons[PDF]

Bibollet-Ruche et al. CD4 Receptor diversity in chimpanzees protects against SIV infection.



McLester, E., Sweeney, K., Stewart, F.A., Piel, A.K. Leopard (Panthera pardus) predation on a red-tailed monkey (Cercopithecus ascanius) in the Issa Valley, western Tanzania. Primates. [PDF].

Piel, A.K., Bonnin, N.,  Ramirez-Amaya, S., Wondra, E., Stewart, F.A. Chimpanzees and their mammalian sympatriates in the Issa valley, Tanzania. Afr J Ecology. DOI: 10.1111/aje.12570 [PDF]

Brožováa, K., Modrý, D., Dadákováa, E., Mapuab, M.I., OPiel, A.K., Stewart, F.A., Celera, V., Hrazdilová, K. PARV4 found in wild chimpanzee faeces – alternate route of transmission? Archives of Virology. [PDF]

Burke, C., Rashman, M.F., McAree, O., Hambrecht, L., Longmore, S.N., Piel, A.K., Wich, S.A. Addressing environmental and atmospheric challenges for capturing high-precision thermal infrared data in the field of astro-ecology. Proceedings of SPIE Astronomical Telescopes and Instrumentation.[PDF]

Van Castern, A., Oelze, V.M., Angedakin, A., Kalan, A.K., Kambi, M., Boesch, C., Kuhl, H., Langergraber, K.E., Piel, A.K., Stewart, F.A., Kupczik, K. Savannah dwelling chimpanzees eat more mechanically demanding foods than their tropical forest equivalents. Communications Biology[Link].

Van Castern, Shulz-Korna, E., Kupczik, K. Is savannah food dustier? Comparisons of the external abrasive loads of chimpanzee plant foods (poster). Am Asso. Phys. Meeting, Austin, USA. (Abstract).

Barbian, H., Connell, A., Avitto, A., Russel, R., Smith, A., Gundlapally, M., Shazad, A., Li, Y., Bibollet-Ruche, F., Wroblewski, E., Mjungu, D., Lonsdorf, E., Stewart, F., Piel, A., Pusey, A., Sharp, P., Hahn, B.  CHIIMP: An automated high-throughput microsatellite genotyping approach reveals greater allelic diversity in wild chimpanzees. Ecol and Evolution. DOI: [Link]

Piel, A.K. Temporal patterns of chimpanzee loud calls in the Issa Valley, Tanzania: Evidence of nocturnal acoustic behavior in wild chimpanzees. American J of Physical Anthropology. [PDF]

Bonnin, N., Van Adel, A.C., Kerby, J.T., Piel, A.K., Pintea, L., Wich, S.A. Assessment of chimpanzee nests detectability on drone-acquired images. Drones. doi: 10.3390/drones2020017. [PDF]

Thoemmes, M.S., Stewart, F.A., Hernandez-Aguilar, R.A., Bertone, M.A., Baltzegar, D.A., Borski, R.J., Cohen, N., Coyle, K.P., Piel, A.K., Dunn, R.R. Ecology of Sleeping: The Microbial and Arthropod Associates of Chimpanzee Beds. Roy Soc Open Science. DOI: 10.1098/rsos.180382 [link]

Tagg et al. Nocturnal activity in wild chimpanzees (Pan troglodytes): evidence for flexible sleeping patterns and insights into human evolution. American J of Physical Anthropology.  [PDF]

Stewart, F.A., Piel, A.K., Azkarate, J.C., Pruetz, J.D. Savanna chimpanzees adjust sleeping architecture in response to local weather conditions. American J of Physical Anthropology. [PDF]

Chuma, I., Batamuzi, E., Collins, D., Fyumagwa, R., Hallmaier-Wacker, L., Kazwala, R., Keyyu, J., Lejora, I., Lipende, I., Lueert, S., Paciencia, F., Piel, A., Stewart, F., Zinner, D., Roos, C., and Knauf, S. Treponema pallidum infection is widespread in nonhuman primates in Tanzania. Emerging Infectious Diseases 24, 1002-1009. DOI: [PDF]

Sherrill-Mix, S., McCormick K., Lauder, A., Bailey, A,  Zimmerman, L., Li, Y., Django, J., Bertolani, P., Colin, C., Hart, J., Hart, T., Georgiev, A., Sanz, C., Morgan, D., Atencia, R., Cox, D., Muller, M., Sommer, V., Piel, A., Stewart, F., Speede, S.,  Roman, J., Wu, G.D., Taylor, J., Bohm, R., Rose, H., Carlson, J., Mjungu, D., Schmidt, P., Gaughan, C., Bushman, J., Schmidt, E., Bittinger, K., Collman, R., Hahn, B., and Bushman, F. Allometry and ecology of the bilaterian gut microbiome. Mbio. doi: 10.1128/mBio.00319-18 [PDF]

Schulz, D., Qablan, M.A., Profousova-Psenkova, I., Vallo, P., Fuh, T., Modry, D., Piel, A.K., Stewart, F.A. Petrzelkova, K.J., Fliegerova, K., Anaerobic fungi (class Neocallimastigomycetes) in the gastrointestinal tract of gorillas: an adaptation to a high-fibrous diet. International J of Primatol. [PDF]

Stewart, F.A., Piel, A.K., Luncz, L., Osborne, J., Li, Y., Hahn, B.H., Haslam, M. Recovery, quantification, and amplification of DNA from wild chimpanzee (Pan troglodytes schweinfurthii) termite-fishing tools from the Issa Valley, Tanzania. PLoS ONE[Here]



Piel, A.K.,  F. Stewart. Issa chimpanzees (and sympatric primates): lessons from one community for

     conservation strategies of an entire ecosystem. (abstract). 11th Annual TAWIRI Scientific Meeting.

     Arusha, Tanzania. December 2017.

Stewart, F.A., Bonnin, N., Chitayat, A., Moore, R., Pintea, L., Ramirez-Amaya, S., Piel, A.K. Traces and trends:

     A status update of extra-park chimpanzees of Tanzania’s Greater Mahale Ecosystem. (abstract). 11th

     Annual TAWIRI Scientific Meeting. Arusha, Tanzania. December 2017.

Pintea, L., Jantz, S., Stewart, F.A., Piel, A.K., Salafsky, N., Kamenya, S., Kohi, E., Nakoney, J., Hansen, M.A.

     Decision Support System to Monitor and Inform Chimpanzee Habitat Management in Tanzania

     (abstract). 11th Annual TAWIRI Scientific Meeting. Arusha, Tanzania. December 2017.

Dadáková, E., Brožová, K., Piel, A. K., Stewart F.A., Modrý, D., Celer, V., Hrazdilová, K. Adenovirus infection in

     savanna chimpanzees (Pan troglodytes schweinfurthii) in the Issa Valley, Tanzania. Archives of Virology. [PDF]

Moore, J., Black, J., Hernandez-Aguilar, A.,Idani, G., Piel, A.K., Stewart, F.A. Chimpanzee vertebrate

     consumption: savanna and forest chimpanzees compared. Journal of Human Evolution, 112:30-

     40. [PDF]

Bonnin, N., Van Andel, A.C., Kerby, J.K., Piel, A.K., Wich, S.A. (abstract) Assessment of chimpanzee nests

     detectability using UAV-derived aerial imagery. European Federation for Primatology.  Strasbourg, France.

     August 2017.

Haslam, M. et al. (20 others) and Luncz, L. Primate Archaeology Evolves. Nature Ecology and

     Evolution. doi:10.1038/s41559-017-0286-4 [PDF]

Piel, A.K., Strampelli, P., Greathead, E., Hernandez-Aguilar, A., Moore, J., Stewart, F.A. The diet of open-

     habitat chimpanzees (Pan troglodytes schweinfurthii) in the Issa valley, western Tanzania. Journal of

     Human Evolution, 112:57-69. [PDF]

Piel, A.K. Chitayat, A., Stewart, F.A. Grooming hand clasp by chimpanzees (Pan troglodytes schweinfurthii)

     in the Issa Valley, western Tanzania. Pan Africa News. [PDF].

Almeida Warren, K. Sommer, V., Piel, A.K., Pascual-Garrido, A. Raw material procurement for termite fishing

     tools by wild chimpanzees in the Issa valley, western Tanzania. American Journal of Physical

     Anthropology. DOI: 10.1002/ajpa.23269 [PDF]

Guardado, M.,Davenport, E.R., Romero, I.G., Stewart, F., Piel, A., Perry, G.H. (abstract) Investigating the

     impact of ingested microbes on the gut microbiome composition of chimpanzees. American

     Association of Physical Anthropologists, New Orleans, April 2017.



Schoeninger, M.S., Most, C.A.,  Moore, J.J., Somerville, A.D. Environmental variables across Pan troglodytes

     study sites correspond with the carbon, but not the nitrogen, stable isotope ratios of chimpanzee

     hair. American Journal of Primatology, 78:1055-1069. [PDF]

Pascual-Garrido, A., Sommer, V., Almeida Warren, K. Raw material procurement for termite fishing tools in

     wild chimpanzees (abstract). Chimpanzees in Context, Chicago, USA. August 2016.

Mapua, M.I., Petrželková, K.J., Burgunder, J., Dadakova, E., Brozova, K., Hrazdilova, K., Stewart, F.A., Piel, A.K.,

     Vallo, P., Fuehrer, H-P., Hashimoto, C., Modry, D., Ahmad Qablan, M.  A comparative molecular survey of

     malaria prevalence among Eastern chimpanzee populations in the Issa valley (Tanzania) and Kalinzu (Uganda). Malaria [PDF].

Kalan, A.K., Piel, A.K., Mundry, R., Wittig, R.W., Boesch, C., Kühl, H.J. Passive acoustic monitoring reveals

     group ranging and territory use: a case study of wild chimpanzees (Pan troglodytes). Frontiers in

     Zoology, DOI: 10.1186/s12983-016-0167-8. [PDF]

Wondra, E., van Castern, A., Pascual-Garrido, A., Stewart, F.A., Piel, A.K. A new report of chimpanzee ant-

     fishing from the Issa Valley, Tanzania. African Primates 11(1): 1-18 [PDF]

McLester, E., Stewart, F.A., and Piel, A.K. Observation of African wild dogs and a chimpanzee. African

     Primates 11(1): 27-36 [PDF]

Johnson, C., Piel, A.K., Forman, D.W., Stewart, F.A., King, A.J. The ecological determinants of baboon troop

     movements at local and continental scales (abstract). Association of Tropical Biology and

     Conservation, Montpellier, France. June 2016

Kalan, A.K., Piel, A.K., Heinicke, S., Lukashevich, H., Mundry, R., Wagner, O.J.J., Wittig, R.M., Boesch, C., and

     Kühl, H.J. Passive acoustic monitoring (PAM) of primates: progress and challenges (abstract). GEO BON

     Open Science conference. June 2016.

Kühl, H.J., Kalan, A., Arandjelovic, M. and 90 others. Chimpanzee accumulative stone throwing. Scientific

     Reports, DOI: 10.1038/srep22219 [PDF]

Jirků-Pomajbíková. K., Čepička, I., Kalousová, B., Jirků. M., Stewart, F., Levecke, B., Modrý, D., Piel, A.K., and

     Petrželková, K.J. Molecular identification of Entamoeba species in savanna woodland chimpanzees (Pan

     troglodytes schweinfurthii). Parasitology, DOI: 10.1017/S0031182016000263. [PDF]

Piel, A.K. (Symposium organizer) Unseen, but not unheard: Passive acoustic monitoring as an emerging tool

     in the study of wild primates. International Primatological Congress, Chicago, August 2016.

Kalan, A.K., Piel, A.K., Heinicke, S., Lukashevich, H., Mundry, R., Wagner, O.J.J., Wittig, R.M., Boesch, C., and

     Kühl, H.J. Detecting presence and species’ ranging behavior using passive acoustic monitoring

     (abstract). International Primatological Congress, Chicago, August 2016.

Piel, A.K., Tibble, L. Screaming bushbabies: Spatiotemporal call patterns of Otolemur

     crassicaudatus (abstract). International Primatological Congress, Chicago, August 2016.

Coutts, N. Piel, A.K. Savanna soundscapes: Chimpanzee long calls and competition for acoustic space

     (abstract). International Primatological Congress, Chicago, August 2016.

McLester, E., Stewart, F.A. Piel, A.K. Mahale’s Monkeys: Cercopithecine and Colobine abundance and

     distribution across unproteced land in the Greater Mahale Ecosystem, western Tanzania

     (abstract). International Primatological Congress, Chicago, August 2016.

McLester, E., Stewart, F.A., Piel, A.K. Red-tailed monkey (Cercopithecus ascanius) ranging behaviour in a

     mosaic landscape as a response to food availability, seasonality and weather (abstract). International

     Primatological Congress, Chicago, August 2016. [PDF]

Kalousová, B., Petrželková, P.J., Čížková, D., Kreisinger, J., Vallo, P., Hasegawa, H., Sato, H., Shutt, K., Tagg,

     N., Piel, A., Stewart, F., Wangue, N., Todd, A., Modrý, D. Epidemiology of strongylid infections in humans

     and wild great apes from several locations across Central and East Africa (abstract). International

     Primatological Congress, Chicago, August 2016.



Ramirez-Amaya, S., McLester, E., Stewart, F.A., Piel, A. Savanna chimpanzees (Pan troglodytes

     schweinfurthii) consume and share blue duiker (Philantomba monticola) meat in the Issa Valley, Ugalla

     western Tanzania. Pan Africa News. [PDF].

Piel, A.K., Cohen, N., Kamenya, S., Ndimuligo, S.A., Pintea, L., Stewart, F.A. Population status of

     chimpanzees in the Masito-Ugalla Ecosystem, Tanzania. American Journal of

     Primatology, DOI: 10.1002/ajp.22438 [PDF]

Johnson, C., Piel, A.K., Forman, D., Stewart, F.A., King, A.J. The ecological determinants of baboon troop \

     movements at local and continental scales. Movement and Ecology, DOI:  10.1186/s40462-015-0040-

     y [PDF]

Bonnin, N., Piel, A.K., Ramirez, M., Li, Y., Loy, E., Crystal, P., Hahn, B., Knapp, L.A., Stewart, F.A. Gene flow      

    and genetic diversity of Tanzania’s Greater Mahale Ecosystem chimpanzees (abstract). European

    Federation for Primatology Congress. Rome, Italy. August 2015.

Piel, A.K., Spillman, B., Hoepfner, A. Nighttime noises: Nocturnal wild chimpanzee and orangutan calling

     behavior using passive acoustic monitoring (abstract). European Federation for Primatology Congress.

     Rome, Italy. August 2015.

Moore D.L, K. E. Langergraber, L. Vigilant. Genetic analyses suggest male philopatry and territoriality in

     savanna-woodland chimpanzees (Pan troglodytes schweinfurthii) of Ugalla, Tanzania. International

     Journal of Primatology, DOI: 10.1007/s10764-015-9830-8 [PDF]

Piel, A.K., A. Lenoel, C. Johnson, F. Stewart. Deterring poaching in western Tanzania: The presence of wildlife

     researchers. Global Ecology and Conservation, 15: 188-199. DOI: 10.1016/j.gecco.2014.11.014 [PDF]

Tibble, L., Stewart, F.A., Piel, A.K. Screaming bushbabies: The influence of environmental factors on loud

     calls in greater galagos (Otolemur crassicaudatus) in the Issa Valley, Ugalla, Western Tanzania (abstract).      Primate Society of Great Britain, Roehampton, UK. April 2015. [PDF]



Russak, S. Using patch focals to study unhabituated dry-habitat chimpanzees (Pan troglodytes

     schweinfurthii) ad sympatric fauna at Issa, Ugalla, Tanzania. International Journal of    

     Primatology, 35:1202-1221. DOI: 10.1007/s10764-014-9803-3  [PDF]

Kershenbaum, A., D. T. Blumstein, M. A. Roch, Ç. Akçay, G. Backus, M. Bee, K. Bohn, Y. Cao, G. Carter, C.

     Cäsar, M.Coen, S. L. DeRuiter, L. Doyle, S. Edelman, R. Ferrer-i-Cancho, T. M. Freeberg, E. C. Garland, M.

     Gustison, H. E. Harley, C. Huetz, M. Hughes, J. H. Bruno, A. Ilany, D. Z. Jin, M. Johnson, C. Ju,  J. Karnowski,

     B. Lohr, M. B. Manser, B. McCowan, E. Mercardo III, P. M. Narins, A. Piel, M. Rice, R. Salmi, K. Sasahara, L.

     Sayigh, Y. Shiu, C. Taylor, E. E. Vallejo, S. Waller, and V. Zamora-Gutierrez. Acoustic sequences in non-

     human animals: A tutorial review and prospectus, Biological Reviews, doi: 10.1111/brv.12160 –

     online [PDF]

Brozova, K., K. Hrazdilová, A.K. Piel, F.A. Stewart, K.J. Petrželková, C. Vladimir. Phylogenetic characterization

     of Bocaviruses infecting wild and captive living chimpanzees (abstract). International Meeting of

     Emerging Diseases and Surveillance. Vienna, Austria. October 2014.

Slaninková, E, K. Hrazdilová, A.K. Piel, F.A. Stewart, K.J. Petrželková, V. Celer. Identification and

     comparison of adenoviruses in fecal samples from wild and captive non-human primates (abstract). 4th

     World Congress on Virology. San Antonio, Texas. October 2014.

Liu W, Li Y, Shaw K, Learn G, Plenderleith L, Malenke J, Sundararaman S, Ramirez M, Crystal P, Smith A,

     Bibollet-Ruche F, Ayouba A, Locatelli S, Esteban A, Mouacha F, Guichet E, Butel C, Ahuka-Mundeke S,

     Inogwabini BI, Ndjango JB, Speede S, Sanz C, Morgan D, Gonder M, Kranzusch P, Walsh P, Georgiev A,

     Muller M, Piel A, Stewart F, l Wilson M, Pusey A, Cui L, Wang Z, Färnert A, Sutherland C, Nolder D, Hart J,

     Hart T, Bertolani P, Gillis A, LeBreton M, Tafon B, Kiyang J, Djoko C, Schneider B, Wolfe N, Mpoudi-Ngole

     E, Delaporte E, Carter R, Culleton R, Shaw G, Rayner J, Peeters M, Hahn. B, Sharp P. African origin of the

     malaria parasite Plasmodium vivax. Nature Communications, DOI:10.1038/ncomms4346. [PDF]

Piel, A.K. and F. A. Stewart. Census and conservation status of chimpanzees (Pan troglodytes

     schweinfurthii) across the Greater Mahale Ecosystem. Report submitted to The Nature Conservancy,


Piel, A.K.  Savanna Sounds: Using remote acoustic sensing to study spatiotemporal patterns in wild

     chimpanzee loud vocalizations in the Issa Valley, Ugalla, Western Tanzania. [PhD dissertation] University

     of California, San Diego. [Here]

Piel, A.K.,  A. Lenoel, F. Stewart. Mammals and menaces in the Issa Valley, western Tanzania: Does

     researcher presence contribute to wildlife conservation. Proceedings of the 9th Annual TAWIRI Scientific

     Meeting. Arusha, Tanzania. December 2013.



Johnson, C., F.A. Stewart, A. King, A. Piel. Day path length of yellow baboons in a primate-rich, seasonal, woodland habitat: The Issa Valley, Tanzania. (abstract). Proceedings of the 9th Annual TAWIRI Scientific Meeting. Arusha, Tanzania. December 2013.

Piel, A.K.,  A. Lenoel, F. Stewart. Mammals and menaces in the Issa Valley, Ugalla, western Tanzania. (abstract). 9th Annual TAWIRI Scientific Meeting. Arusha, Tanzania. December 2013.

Moore, D. and L. Vigilant. A population estimate of chimpanzees (Pan troglodytes schweinfurthii) in the Ugalla region using standard and spatially explicit genetic capture-recapture methods. American Journal of Primatology. DOI: 10.1002/ajp.22237 [PDF]

Moore, D. and L. Vigilant. Genetic diversity at the edge: comparative assessment of Y-chromsome and autosomal diversity in eastern chimpanzees (Pan troglodytes schweinfurthii) of Ugalla, Tanzania. Conservation Genetics. DOI 10.1007/s10592-013-0556-x [PDF]

Kalousova, B., A.K. Piel, K. Pomajbikova, D. Modry, F.A. Stewart, K.J. Petrzelkova. Gastrointestinal parasites of savanna chimpanzees (Pan troglodytes schweinfurthii) in Ugalla, Tanzania. International Journal of Primatology. DOI 10.1007/s10764-014-9753-9 [PDF]

Piel, A.K. & F.A. Stewart. Identifying critical habitats for savanna chimpanzee conservation in western Tanzania using new landscape-scale censusing techniques. Report submitted to The Jane Goodall Institute and the United States Fish and Wildlife Service, 44pp.

Stewart, F.A. & A.K. Piel. Termite fishing by wild chimpanzees: new data from Ugalla, western Tanzania. Primates. [PDF]

Johnson, C.L., F.A. Stewart, D.W. Forman, A.J. King, & A.K. Piel. The yellow mile: Patterns of space- and resource-use by yellow baboons in Ugalla, western Tanzania (abstract). Primate Society of Great Britain, Lincoln, UK. April


Hernandez-Aguilar, R.A., J. Moore, and C. Stanford. Chimpanzee nesting patterns in savanna habitat: Environmental influences and preferences. American Journal of Primatology, 75:979-994 [PDF]

Piel, A.K., F.A. Stewart, L. Pintea, Y. Li, M.A. Ramirez, D.E Loy, P.A. Crystal, G.H. Learn, L.A. Knapp, P.M. Sharp, and B.H. Hahn. The Malagarasi River does not form an absolute barrier to chimpanzee movement in western Tanzania. PLoS ONE. DOI: 10.1371/journal.pone.0058965 [HERE]

Stewart, F.A. and J.D. Pruetz. Do chimpanzee nests serve an anti-predatory function? American Journal of Primatology, 75:593-604. DOI: 10.1002/ajp.22138 [PDF]


Gonzales-Moreno, O., R.A. Hernandez-Aguilar, A.K.Piel, F.A. Stewart, M. Gracenea, J. Moore. Prevalence and climatic associated factors of Cryptosporidium sp. infections in savanna chimpanzees from Ugalla, Western Tanzania. Parasitology Research, DOI: 10.1007/s00436-012-3147-8 [PDF]

Russak, S.R. F.A. Stewart, A.K. Piel. A comparison of methods for studying elusive savanna chimpanzees at Ugalla, Tanzania. American Journal of Physical Anthropology, Supp.[PDF]

Vallo, P., K.J. Petrzelkova ́, I. Profousova ́, J. Petrasova,K. Pomajbıkova ́, F. Leendertz, C. Hashimoto, N. Simmons, F. Babweteera, Z. Machanda, A. Piel, M. Robbins, C. Boesch, C. Sanz, D. Morgan, V. Sommer,T. Furuichi, S. Fujita, T. Matsuzawa, T. Kaur, M.A. Huffman, D. Modry ́. Molecular Diversity of Entodiniomorphid Ciliate Troglodytella abrassarti and its Coevolution With Chimpanzees. American Journal of Physical Anthropology DOI 10.1002/ajpa.22067 [PDF]


Rudicell, R., A.K. Piel, F. Stewart, D.L. Moore, G.H. Learn, T. Li, J. Takehisa, L.Pintea, G.M. Shaw, J. Moore, P.M. Sharp, B.H. Hahn. High Prevalence of Simian Immunodeficiency Virus Infection in a Community of Savanna Chimpanzees. J of Virology 85 (18):9918-9928. [PDF]

Stewart, F.A., A.K. Piel, W.C. McGrew. Living archaeology: Artefacts of specific nest site fidelity in wild chimpanzees. Journal of Human Evolution 61(4): 388-395. [PDF]

Stewart, F.A. The evolution of shelter: ecology and ethology of chimpanzee nest building. [PhD dissertation] University of Cambridge, Cambridge. [Here]

Piel, A.K. A novel acoustic localization system for the study of wildlife: A case study of chimpanzees in the Issa Valley, Ugalla. Conference Proceedings, 7th Tanzania Wildlife Research Institute Scientific Conference, Arusha, Tanzania, December 2009.


Plumptre, A.J., Rose, R., Nangendo, G., Williamson, E.A., Didier, K., Hart, J., Mulindahabi, F., Hicks, C., Griffin, B., Ogawa, H., Nixon, S., Pintea, L., Vosper, A., McClennan, M., Amsini, F., McNeilage, A., Makana, J.R., Kanamori, M., Hernandez, A., Piel, A., Stewart, F., Moore, J., Zamma, K., Nakamura, M., Kamenya, S., Idani, G., Sakamaki, T., Yoshikawa, M., Greer, D., Tranquilli, S., Beyers, R., Furuichi, T., Hashimoto, C. & Bennett, E. (2010). Eastern Chimpanzee (Pan troglodytes schweinfurthii): Status Survey and Conservation Action Plan 2010–2020. IUCN, Gland, Switzerland. [Published in English and French [Link]


Haslam, M., A. Hernandez-Aguilar, V. Ling, S. Carvalho, I. de la Torre, A. DeStefano, A. Du, B. Hardy, J. Harris, L. Marchant, T. Matsuzawa, W. McGrew, J. Mercader, R. Mora, M. Petraglia, H. Roche, E. Visalberghi & R. Warren. Primate archaeology. Nature 460, 339-344. [PDF]

Hernandez-Aguilar, R. A. Chimpanzee nest distribution and site reuse in a dry habitat: implications for early hominin ranging. J. Hum. Evol. 57: 350-364. [PDF]


Yoshikawa, M., H. Ogawa, T. Sakamaki & G. Idani. Population density of chimpanzees in Tanzania. Pan Africa News 15(2): 17-20. [LINK]


Hernandez-Aguilar, R. A., J. Moore, and T. R. Pickering. Savanna chimpanzees use tools to harvest the underground storage organs of plants. Proceedings of the National Academy of Sciences 104, 19210-19213. 2007 Cozzarelli Prize Winner[LINK]

Ogawa, H., G. Idani, J. Moore, L. Pintea, and R. A. Hernandez-Aguilar. Sleeping patterns and nest distribution of chimpanzees in the savanna woodland, Ugalla, Tanzania. International Journal of Primatology 28, 1397-1412. [Link]

Piel, A. K., and J. Moore. Locating elusive animals: Using a passive acoustic system to study savanna chimpanzees at Ugalla, Western Tanzania [abstract]. American Journal of Physical Anthropology. Suppl. 44, 189.


Hernandez-Aguilar, R. A. Ecology and Nesting Patterns of Chimpanzees (Pan troglodytes) in Issa, Ugalla, Western Tanzania [PhD dissertation]. University of Southern California, Los Angeles.

Piel, A. K., L. Pintea, and J. Moore. Several ways to be a savanna chimpanzee. International Journal of Primatology 27 (Supp. 1): Abstract 169.

Hernandez-Aguilar, R. A., J. Moore, F. Stewart, A. K. Piel, H. Ogawa, and L. Pintea. Surveys of Ugalla and Masito. In: Surveys of Chimpanzees and other Biodiversity in Western Tanzania. D. Moyer, A. J. Plumptre, L. Pintea, R. A. Hernandez-Aguilar, J. Moore, F. Stewart, T. R. B. Davenport, A. K. Piel, S. Kamenya, H. Mugabe, N. Mpunga, and M. Mwangoka (eds.). Report submitted to Wildlife Conservation Society, the Jane Goodall Institute and the United States Fish and Wildlife Service, pp., 24-31.

Moyer, D., A. J. Plumptre, L. Pintea, R. A. Hernandez-Aguilar, J. Moore, F. Stewart, T. R. B. Davenport, A. K. Piel, S. Kamenya, H. Mugabe, N. Mpunga, and M. Mwangoka (eds.). Surveys of Chimpanzees and other Biodiversity in Western Tanzania. Report submitted to Wildlife Conservation Society, the Jane Goodall Institute and the United States Fish and Wildlife Service, 65pp.

Ogawa, H., J. Moore, S. Kamenya. Chimpanzees in the Ntakata and Kakungu areas, Tanzania. Primate Conserv. 21: 97-101. [PDF]


Gonzalez-Moreno, O., M. Gracenea, R. A. Hernandez-Aguilar, and A. Perez. Una de parásitos: los chimpancés de Ugalla. National Geographic (Spain) 15, 4.


Hernandez-Aguilar, R. A. Ugalla o Reserva del Bosque de Tongwe Este: Reporte de cambios en los últimos tres años. Boletín de la Asociación Primatológica Española 8, 4-6.


Schoeninger, M. J., J. Moore, and J. M. Sept. Subsistence strategies of two “savanna” chimpanzee populations: the stable isotope evidence. American Journal of Primatology 49, 297-314. [PDF]

Ogawa, H., G. Idani, M. & Kanamori. Chimpanzee habitat in the savanna woodland, Ugalla, Tanzania. Primate Research 15: 135-146.


Moore, J. Savanna chimpanzees, referential models and the last common ancestor. In: Great Ape Societies. W. C. McGrew, L. F. Marchant, and T. Nishida (eds.): Cambridge University Press, Cambridge, pp., 275-292.


Moore, J. Plants of the Tongwe East Forest Reserve (Ugalla), Tanzania. Tropics 3, 333-340. [PDF]


Moore, J.  “Savanna” chimpanzees. In: Topics in Primatology: Human origins. T. Nishida, W. C. McGrew, P. Marler, M. P. Pickford, and F .B. M. de Waal (eds.): University of Tokyo Press, Tokyo, pp., 99-118.


Moore, J. Arid country chimpanzees. Anthroquest 36, 8-10.

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