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Akoua-Koffi, C., Beermann, S., Calvignac-Spencer, S., ... Unwin, S., Wittig, R. M., & Wittiger, L. (2018). Obituary: Siv Aina Jensen Leendertz (Born Siv Aina Jensen: 1973–2018). International Journal of Primatology, 39(6), 1001-1004.

Löhrich, T., Behringer, V., Wittig, R. M., Deschner, T., & Leendertz, F. H. (2018). The use of neopterin as a noninvasive marker in monitoring diseases in wild chimpanzees. EcoHealth, 15(4), 792-803.

Schamberg, I., Wittig, R. M., & Crockford, C. (2018). Call type signals caller goal: A new take on ultimate and proximate influences in vocal production. Biological Reviews, 93(4), 2071-2082.

Samuni, L., Preis, A., Mielke, A., Deschner, T., Wittig, R. M., & Crockford, C. (2018). Social bonds facilitate cooperative resource sharing in wild chimpanzees. Proceedings of the Royal Society London B, 285(1888): 20181643.

Samuni, L., Preis, A., Deschner, T., Crockford, C. ǂ., & Wittig, R. (2018). Reward of labor coordination and hunting success in wild chimpanzees. Communications Biology, 1: 138.

McCarthy, M., Despres-Einspenner, M.-L., Samuni, L., Mundry, R., Lemoine, S., Preis, A., Wittig, R. M., Boesch, C., & Kühl, H. S. (2018). An assessment of the efficacy of camera traps for studying demographic composition and variation in chimpanzees (Pan troglodytes). American Journal of Primatology, 80(9): e22904.

Preis, A., Samuni, L., Mielke, A., Deschner, T., Crockford, C. ǂ., & Wittig, R. M. (2018). Urinary oxytocin levels in relation to post-conflict affiliations in wild male chimpanzees (Pan troglodytes verus). Hormones and Behavior, 105, 28-40.

Mielke, A., Preis, A., Samuni, L., Gogarten, J. F., Wittig, R. M., & Crockford, C. (2018). Flexible decision-making in grooming partner choice in sooty mangabeys and chimpanzees. Royal Society Open Science, 5(7): 172143.

Wu, D., Behringer, V., Wittig, R. M., Leendertz, F., & Deschner, T. (2018). Urinary neopterin levels increase and predict survival during a respiratory outbreak in wild chimpanzees (Taï National Park, Côte d'Ivoire). Scientific Reports, 8: 13346.

Tagg, N., McCarthy, M., Dieguez, P., ... Wessling, E. G., Wittig, R. M., Zuberbuehler, K., Kühl, H. S., & Boesch, C. (2018). Nocturnal activity in wild chimpanzees (Pan troglodytes): Evidence for flexible sleeping patterns and insights into human evolution. American Journal of Physical Anthropology, 166(3), 510-529.

Sonnweber, R., Araya-Ajoy, Y. G., Behringer, V., Deschner, T., Tkaczynski, P. J., Fedurek, P., Preis, A., Samuni, L., Zommers, Z., Gomes, C., Zuberbühler, K., Wittig, R. M., & Crockford, C. (2018). Circadian rhythms of urinary cortisol levels vary between individuals in wild male chimpanzees: A reaction norm approach. Frontiers in Ecology and Evolution, 6: 85.

Wessling, E. G., Deschner, T., Mundry, R., Pruetz, J. D., Wittig, R. M., & Kühl, H. S. (2018). Seasonal variation in physiology challenges the notion of chimpanzees (Pan troglodytes verus) as a forest-adapted species. Frontiers in Ecology and Evolution, 6: 60.

Adamescu, G. S., Plumptre, A. J., Abernethy, K. A., ... Gilby, I. C., Wittig, R. M., Breuer, T., ... Gourlet-Fleury, S., Mulindahabi, F., & Beale, C. M. (2018). Annual cycles are the most common reproductive strategy in African tropical tree communities. Biotropica, 50(3), 417-430.

Crockford, C., Deschner, T., & Wittig, R. M. (2018). The role of oxytocin in social buffering: What do primate studies add? In R. Hurlemann, & V. Grinevich (Eds.), Current Topics in Behavioral Neurosciences (pp. 155-173). Berlin: Springer.

Gogarten, J. F., Davies, T. J., Benjamino, J., Gogarten, J. P., Graf, J., Mielke, A., Mundry, R., Nelson, M. C., Wittig, R. M., Leendertz, F. H., & Calvignac-Spencer, S. (2018). Factors influencing bacterial microbiome composition in a wild non-human primate community in Taï National Park, Côte d’Ivoire. The ISME Journal, 12, 2559-2574.

Grützmacher, K., Keil, V., Leinert, V., Legullion, F., Henlin, A., Couacy-Hyman, E., Köndgen, S., Lang, A., Deschner, T., Wittig, R. M., & Leendertz, F. H. (2018). Human quarantine: Towards reducing infectious pressure on chimpanzees at the Taї Chimpanzee Project, Côte d'Ivoire. American Journal of Primatology, 80(1): e22619.

Knauf, S., Gogarten, J. F., Schuenemann, V. J., ... Raoult, D., Wittig, R. M., Roos, C., Leendertz, F. H., Šmajs, D., Nieselt, K., Krause, J., & Calvignac-Spencer, S. (2018). Nonhuman primates across sub-Saharan Africa are infected with the yaws bacterium Treponema pallidum subsp. pertenue. Emerging Microbes & Infections, 7(1): 157.

Patrono, L. V., Samuni, L., Corman, V. M., Nourifar, L., Röthemeier, C., Wittig, R. M., Drosten, C., Calvignac-Spencer, S., & Leendertz, F. H. (2018). Human coronavirus OC43 outbreak in wild chimpanzees, Côte d´Ivoire, 2016. Emerging Microbes & Infections, 7(1): 118.

Sirianni, G., Wittig, R. M., Gratton, P., Mundry, R., Schüler, A., & Boesch, C. (2018). Do chimpanzees anticipate an object's weight? A field experiment on the kinematics of hammer-lifting movements in the nut-cracking Tai chimpanzees. Animal Cognition, 21(1), 109-118.

Wittig, R. M. (2018). 40 years of research at the Taï Chimpanzee Project. Pan Africa News, 25(2), 16-18.

Wittig, R. M., & Crockford, C. (2018). Chimpanzees: Investigating cognition in the wild. In Field and laboratory methods in animal cognition (pp. 115-145). Cambridge: Cambridge University Press.

Wu, D., Löhrich, T., Sachse, A., Mundry, R., Wittig, R. M., Calvignac‑Spencer, S., Deschner, T., & Leendertz, F. H. (2018). Seasonal and inter‑annual variation of malaria parasite detection in wild chimpanzees. Malaria Journal, 17: 38.

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