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Under review

    • Duboscq J., Agil M., Perwitasari-Farajallah D., Engelhardt A.: Reciprocity in wild female crested macaques, Macaca nigra, (International Journal of Primatology).
    • Neumann C., Kulik L., Agil M., Engelhardt A., Widdig A.: Temporal dynamics and reproductive consequences of coalition formation in male primates (Proceedings of the Royal Society of London, B).
    • Engelhardt A., Heistermann M , Agil M , Perwitasari-Farajallah D., Widdig A., Higham J.P.: A despotic male-male competitive regime in a socially tolerant primate species, the crested macaque (Animal Behaviour).

2021

    • Martínez-Inigo L., Engelhardt A., Agil M., Pilot M., Majolo B.: Intergroup lethal gang attacks in wild crested macaques (2021), Macaca nigra. Animal Behaviour 180: 81-91. doi
    • Sadoughi B., Girard-Buttoz C., Engelhardt A., Heistermann M., Ostner J. (2021). Non-invasive assessment of metabolic responses to food restriction using urinary triiodothyronine and cortisol measurement in macaques. General and Comparative Endocrinology 306. doi
    • Higham J.P., Heistermann M., Agil M., Perwitasari-Farajallah D., Widdig A., Engelhardt A. (2021). Female fertile phase synchrony, and male mating and reproductive skew, in the crested macaque. Scientific Reports, 11: 4251-4251.  doi

2020

    • Pasetha A., Danish .LM., Perwitasari-Farajallah D., Agil M., Engelhardt A. 2020. Identification of follower status based on male proximity score in crested macaque (2020). HAYATI Journal of Biosciences, 27:241-246.  doi
    • Clark P.R., Waller B.M., Burrows A.M., Julle-Danière E., Agil M., Engelhardt A., Micheletta J.(2020): Morphological variants of bared-teeth displays have different social interaction outcomes in crested macaques (Macaca nigra).American Journal of Physical Anthropology 173: 411-422. doi
    • Tyrrell M., Berman C. M., Duboscq J., Agil M., Sutrisno T., Engelhardt A. (2020): Avoidant social style among wild crested macaque males (Macaca nigra) in Tangkoko Nature Reserve, Sulawesi, Indonesia, Behaviour 157: 451-246. doi
    • Rebout, N., De Marco, A., Lone, J.-C., Sanna, A., Cozzolino, R., Micheletta, J., Sterck, E. H. M. , Langermans, J. A. M, Lemasson, A., Thierry, B. (2020). Tolerant and intolerant macaques show different levels of structural complexity in their vocal communication. Proc. R. Soc, B.28720200439. doi
    • Waller, B. M., Julle-Daniere, E., & Micheletta, J. (2020). Measuring the evolution of facial ‘expression’ using multi-species FACS. Neuroscience & Biobehavioral Reviews, 113:1-11. doi

2019

    • Holzner A., Ruppert N., Swat F., Schmidt M., Weiß B.M., Villa G., Mansor A., Mohd Sah S.A., Engelhardt A., Kühl H., Widdig A. (2019). Macaques can contribute to greener practices in oil palm plantations when used as biological pest control. Current Biology, 29 :R1066-R1067.  doi

2018

    • Gholib G., Heistermann M., Agil M., Supriatna I., Purwantara B., Nugraha T., Engelhardt A. (2018): Comparison of fecal preservation and extraction methods for steroid hormone metabolite analysis in wild crested macaques. Primates, 59:281-292.
    • Gholib G., Agil M., Supriatna I., Purwantara B., Heistermann M., Engelhardt A. (2018): Repeated freeze-thaw cycles but not short-term storage of fecal extracts at ambient temperature influence the stability of steroid metabolite levels in crested macaques. J Kedokteran Hewan, 11(2), 78-85.
    • Balasubramaniam K. N., Beisner B. A., Berman C. M., De Marco A., Duboscq J., Thierry, B., de Waal, F. B. M., & McCowan, B. (2018): The influence of phylogeny, social style, and sociodemo-graphic factors on macaque social network structure. Am J of Primatol 80(1). doi: 10.1002/ajp.22727.
    • Danish L., Kerhoas D., Bertrand D., Febriyanti D., Engelhardt A. (2018): Crested Macaque, Macaca nigra (Desmarest, 1822), Indonesia (Sulawesi). In: Primates in Peril: The World’s 25 Most Endangered Primates 2017-2018. (eds. Schwitzer, C, Mittermeier, RA, Rylands AB, Chiozza F, Williamson EA, Macfie EJ, Wallis J & Cotton, A), 64-66.

2017

    • Duboscq, J.; Neumann, C.; Agil, M; Perwitasari-Farajallah, D.; Thierry, B.; Engelhardt, A. (2017): Degrees of freedom in social bonds of crested macaques females. Animal Behaviour 123: 411-426.
    • Engelhardt, A.; Muniz, L.; Perwitasari-Farajallah, D.; Widdig, A. (2017): Highly Polymorphic Microsatellite Markers for the Assessment of Male Reproductive Skew and Genetic Variation in Critically Endangered Crested Macaques (Macaca nigra). Im J Primatol  38: 672-691.
    • Marty, PR.; Hodges, K.; Heistermann, M.; Agil, M.; Engelhardt, A. (2017): Is social dispersal stressful? A study in male crested macaques (Macaca nigra). Hormones and Behaviour 87: 62-68

2016

    • Kerhoas, D.; Kulik, L.; Perwitasari-Farajallah, D.; Agil, M.; Engelhardt, A.; Widdig, A. (2016): Mother-male bond, but not paternity, influences male-infant affiliation in wild crested macaques. Behav Ecol Sociobiol DOI: 10.1007/s00265-016-2116-0.
    • Marty, PR.; Hodges, K.; Agil, M.; Engelhardt, A. (2016): Determinants of immigration strategies in male crested macaques (Macaca nigra). Animal Behabiour 87: 62-68.

2015

    • Marty, PR.; Hodges, K.; Agil, M.; Engelhardt, A. (2015): Alpha male replacements and delayed dispersal in crested macaques (Macaca nigra). American journal of primatology.
    • Higham, JP.; Kraus, C.; Stahl-Hennig, C.; Engelhardt, A.; Fuchs, D.; Heistermann, M. (2015): Evaluating non-invasive markers of non-human primate immune activation. Am J Phys Anthropol 158: 673-684.
    • Danish, LM.; Heistermann M.; Agil, M,; Engelhardt, A. (2015): Validation of a novel collection device for non-invasive urine sampling from free-ranging animals. Plos One 10: e0142051.
    • Micheletta, J.; Whitehouse, J.; Parr, L.A.; Marshman, P.; Engelhardt, A.; Waller, B.M. (2015): Familiar and unfamiliar face recognition in crested macaques (Macaca nigra). Royal Society Open Science. Doi: 10.1098/rsos.150109.

2014

    • Kerhoas, D.; Perwitasari-Farajallah, D.; Agil, M.; Widdig, A.; Engelhardt, A. (2014): Social and ecological factors influencing offspring survival in wild macaques. Behavioral Ecology, DOI:10.1093/beheco/aru099.
    • Duboscq, J.; Agil, M.; Engelhardt, A. ; Thierry, B. (2014): The function of post-conflict interactions: new prospects from the study of a tolerant species of primate. Animal Behaviour 87: 107-120.

2013

    • Neumann, C; Agil, M.; Widdig, A.; Engelhardt, A.; (2013): Personality, of wild male crested Macaques (Macaca nigra), PLoS One, 8(8): e69383. doi:10.1371/journal.pone.006938375:763-73.
    • Micheletta, J.; Engelhardt, A.; Matthews, L.; Agil, M.; Waller, B.M.; (2013): Multicomponent and multimodal lipsmacking in crested macaques (Macaca nigra), American Journal of Primatology, 75:763-73.
    • Duboscq, J.; Micheletta, J.; Agil, M.; Hodges, JK.; Thierry, B.; Engelhardt, A. (2013): Social tolerance in wild female crested macaques, Macaca nigra in Tangkoko-Batuangus Nature Reserve, Sulawesi, Indonesia, American Journal of Primatology, 75:361-75.

2012

    • Micheletta, J.; Waller, B.M.; Panggur, M.R.; Neumann C.; Duboscq J.; Agil, M.; Engelhardt, A. (2012): Social bonds affect anti-predator behaviour in a tolerant species of macaque, Macaca nigra, Proceedings Roy Soc B-Biol Sci 279:4042-4050.
    • Higham, J.P.; Heistermann, M.; Saggau, C.; Agil, M.; Perwitasari‐Farajallah, D.; Engelhardt, A.: Sexual signalling in female crested macaques and the evolution of primate fertility signals, BMC Evolutionary Biology 12: 89.
    • Palacios, J.F.G.; Engelhardt, A.; Agil, M.; Hodges, J.K.; Bogia, R.; Waltert, M. (2012): Status of, and conservation recommendations for, the Critically Endangered crested black macaque Macaca nigra in Tangkoko, Indonesia, Oryx 46: 290-297.

2011

    • Neumann, C.; Duboscq, J.; Dubuc, C.; Ginting, A.; Irwan, A.M.; Agil, M., Widdig, A.; Engelhardt, A. (2011): Assessing dominance hierarchies: validation and advantages of progressive evaluation with Elo rating, Animal Behaviour 82: 911-921.
    • Palacios,J.F.G.; Engelhardt, A.; Agil, M.; Hodges, J.K., Bogia, R.; Waltert, M. (2011): Population status of crested black macaques (Macaca nigra) in the Tangkoko Nature Reserve, Sulawesi, Indonesia, Oryx, online.

2010

    • Neumann, C.; Assahad, G.; Hammerschmidt, K.; Farajallah, D.P.; Engelhardt, A. (2010): Loud calls in male Macaca nigra – a signal of dominance in a tolerant primate species, Animal Behaviour 79: 187-193.

2009

    • Duboscq, J.; Perwitasari-Farajallah, D.; Engelhardt, A. (2009):  Social Interactions between Females in Wild Crested Macaques, Macaca nigra”, Folia Primatologica, 80, 157.
    • Engelhardt, A.; Heistermann, M.; Perwitasari-Farajallah, D. (2009): Sex skin colouration in male Sulawesi crested black macaques (Macaca nigra), Primate Eye, 96, 337.
    • Neumann, C.; Assahad, G.; Hammerschmidt, K.; Perwitasari-Farajallah, D. ; Engelhardt, A. (2009): Male Sexual Signals in Crested Macaques (Macaca nigra)”, Folia Primatologica, 80, 131–2.

2008

    • Assahad, G.; Neumann, C.; Hammerschmidt, K.; Farajallah, D.P.; Engelhardt, A. (2008): Rank dependant differences in loud call frequency and structure in Sulawesi crested black macaques (Macaca nigra), Folia Primatologica, 79, 311.
    • Duboscq, J.; Neumann, C.; Perwitasari-Farajallah, D.; Engelhardt, A. (2008): Daytime birth of a baby crested black macaque (Macaca nigra) in the wild, Behavioural Processes 79: 81–84.
    • Engelhardt, A.; Perwitasari-Farajallah, D. (2008): Reproductive biology of Sulawesi crested black macaques (Macaca nigra), Folia Primatologica, 79, 326.
    • Neumann, C.; Assahad, G.; Hammerschmidt, K.; Farajallah, D.P.; Engelhardt, A. (2008): Individual and contextual differences in loud calls of male crested black macaques, Macaca nigra, Folia Primatologica, 79, 366.
    • Duboscq, J.; Perwitasari-Farajallah, D.; Engelhardt, A. (2009):  Social Interactions between Females in Wild Crested Macaques, Macaca nigra”, Folia Primatologica, 80, 157.
    • Engelhardt, A.; Heistermann, M.; Perwitasari-Farajallah, D. (2009): Sex skin colouration in male Sulawesi crested black macaques (Macaca nigra), Primate Eye, 96, 337.