Prof. Dr. Anja Widdig

Chapoy, N., Alvarez-Garita, M., Howard, E., Insausti, B. C., Kulick, N. K., Marinaro, M., Mendez, H. A., Morales, S. R., Petersdorf, M., Poirier, A. C., Sandoval, R., Severino, G., Arias, W. T., Widdig, A., Melin, A. D., & Jack, K. M. (in press). Dominance rank, facial morphology, and testes size in male white-faced capuchins: evidence 2 for pre- and post-mating competition. Proceedings of the Royal Society B: Biological Sciences.

Poirier, A. C., Kulick, N. K., Morales, S. R., Kücklich, M., Weiß, B. M., Birkemeyer, C., Widdig, A., Melin, A. D., & Jack, K. M. (in press). Urine washing and urinary odor profiles in relation to dominance rank status in wild male capuchin monkeys (Cebus imitator). Royal Society Open Science.
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De Moor, D., Skelton, M., MacaqueNet, Amici, F., Arlet, M., Balasubramaniam, K., Ballesta, S., Beisner, B., Berghänel, A., Berman, C. M., Bernstein, S. K., Bhattacharjee, D., Bliss-Moreau, E., Brotcorne, F., Butovskaya, M., Carosi, M., Chatterjee, M., Cowl, V., De La O, C., Dettmer, A., Dhawale, A. K., Erinjery, J. J., Fischer, J., García-Nisa, I., Giraud, G., Hammer, R., Hansen, M. F., Holzner, A., Kaburu, S., Konečná, M., Kumara, H. N., Larrivaz, M., Leca, J.-B., Legrand, M., Lehmann, J., Li, J.-H., MacIntosh, A., Majolo, B., Maréchal, L., Marty, P., Massen, J. J. M., Maulany, R. I., McCowan, B., McFarland, R., Meunier, H., Micheletta, J., Mishra, P. S., Molesti, S., Müller-Klein, N., Ngakan, P. O., Palagi, E., Pflüger, L. S., Polizzi di Sorrentino, E., Reichard, U. H., Riley, E., Rincon, A., Ruppert, N., Sadoughi, B., Sah, S. A. M., Santhosh, K., Schino, G., Singh, M., Sinha, A., Sosa, S., Stribos, M. S., Sueur, C., Tkaczynski, P. J., Widdig, A., Whitehouse, J., Wooddell, L., Xia, D.-P., Young, C., Schülke, O., Ostner, J., Neumann, C., Duboscq, J., & Brent, L. J. N. (2025). MacaqueNet: Advancing comparative behavioural research through large-scale collaboration. Journal of Animal Ecology, 94(4), 519-534.
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Neugebauer, E., Lestari, S. D., Kaletuang, I. R., Perwitasari-Farajallah, D., & Widdig, A. (2025). Distribution and human-mediated establishment of crested Macaque (Macaca nigra) populations in the North Moluccas, Indonesia. International Journal of Primatology, 46(2), 419 -435.
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Widdig, A., Engel, L., Ruiz-Lambides, A., Dubuc, C., & Weiß, B. (2025). Assessing variance in male reproductive skew based on long-term data in free-ranging rhesus macaques. American Journal of Primatology, 87(2): e23687.
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Freudiger, A., Jovanovic, V. M., Huang, Y., Snyder-Mackler, N., Conrad, D. F., Miller, B., Montague, M. J., Westphal, H., Stadler, P. F., Bley, S., Horvath, J. E., Brent, L. J. N., Platt, M. L., Ruiz-Lambides, A., Tung, J., Nowick, K., Ringbauer, H., & Widdig, A. (2025). Estimating realized relatedness in free-ranging macaques by inferring identity-by-descent segments. Proceedings of the National Academy of Sciences of the United States of America, 122(3): e2401106122.
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Schaffer, A., Caicoya, A. L., Widdig, A., Holland, R., & Amici, F. (2025). Quantity discrimination in 9 ungulate species: Individuals take item number and size into account to discriminate quantities. Cognition, 254: 105979.
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Schlögl, B. M., Birkemeyer, C., Kücklich, M., & Widdig, A. (2025). Chemical signatures of social information in Barbary macaques. Scientific Reports, 15: 1902.
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Weiß, B. M. *., & Widdig, A. (2024). Influence of visual information on sniffing behavior in a routinely trichromatic primate. Behavioral Ecology, 35(5): arae055.
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Zetzsche, M., Weiß, B., Kücklich, M., Stern, J., Birkemeyer, C., Widdig, A. ǂ., & Penke, L. (2024). Combined perceptual and chemical analyses show no compelling evidence for ovulatory cycle shifts in women's axillary adour. Proceedings of the Royal Society B: Biological Sciences, 291(2027): 20232712.
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Schaffer, A., Widdig, A., Holland, R., & Amici, F. (2024). Evidence of object permanence, short-term spatial memory, causality, understanding of object properties and gravity across five different ungulate species. Scientific Reports, 14(1): 13718.
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Simon, M., Widdig, A., & Weiß, B. M. (2024). Sniffing behavior of semi free‐ranging Barbary macaques (Macaca sylvanus). American Journal of Primatology, 86(5): e23611.
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Mörchen, J., Luhn, F., Wassmer, O., Kunz, J. A., Kulik, L., van Noordwijk, M., Rianti, P., Rahmaeti, T., Atmoko, S. S. U., Widdig, A. ǂ., & Schuppli, C. (2024). Orangutan males make increased use of social learning opportunities, when resource availability is high. iScience, 27(2): 108940.
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Holzner, A., Rameli, N. I. A. M., Ruppert, N., & Widdig, A. (2024). Agricultural habitat use affects infant survivorship in an endangered macaque species. Current Biology, 34, 410-416.
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Kerhoas, D., Kulik, L., Perwitasari-Farajallah, D., Engelhardt, A., & Widdig, A. (2023). Do wild, male, crested Macaques (Macaca nigra) respond to the screams of infants involved in agonistic interactions? International Journal of Primatology, 44(4), 626-648.
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Mörchen, J., Luhn, F., Wassmer, O., Kunz, J., Kulik, L., van Noordwijk, M., van Schaik, C., Rianti, P., Atmoko, S. S. U., Widdig, A. ǂ., & Schuppli, C. ǂ. (2023). Migrant orangutan males use social learning to adapt to new habitat after dispersal. Frontiers Ecology And Evolution, 11.
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Chanvin, M., Lamarque, F., Diko, N., Agil, M., Micheletta, J., & Widdig, A. (2023). Ten years of positive impact of a conservation education program on children's knowledge and behaviour towards crested macaques (Macaca nigra) in the Greater Tangkoko Area, North Sulawesi, Indonesia. International Journal of Primatology.
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Amici, F., Widdig, A., von Fersen, L., Lopez Caicoya, A., & Majolo, B. (2023). Corrigendum: Intra-specific variation in the social behavior of Barbary macaques (Macaca sylvanus). Frontiers in Psychology, 14: 1192731.
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Marcillo, A., Baca Cabrera, J. C., Widdig, A., & Birkenmeyer, C. (2023). A comparison between mobile and stationary gas chromatography–mass spectrometry devices for analysis of complex volatile profiles. Analytical and Bioanalytical Chemistry, 415, 137-155.
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Jänig, S. *., Kücklich, M. *., Kulik, L., Zetzsche, M., Weiß, B. M. ǂ., & Widdig, A. ǂ. (2022). Olfactory inspection of female reproductive states in chimpanzees. Frontiers in Ecology and Evolution, 10: 884661.
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Neumann, C., Kulik, L., Agil, M., Engelhardt, A., & Widdig, A. (2022). Temporal dynamics and fitness consequences of coalition formation in male primates. Proceedings of the Royal Society B: Biological Sciences, 289(1976): 20212626.
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Amici, F., Röder, S., Kiess, W., Borte, M., Zenclussen, A. C., Widdig, A. ǂ., & Herberth, G. (2022). Maternal stress, child behavior and the promotive role of older siblings. BMC Public Health, 22: 863.
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Karimullah, K., Widdig, A., Sah, S. A. M., & Amici, F. (2022). Understanding potential conflicts between human and non-human-primates: A large-scale survey in Malaysia. Biodiversity and Conservation, 31, 1249-1266.
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Kücklich, M., Jänig, S., Kulik, L., Birkemeyer, C., Weiss, B. M., & Widdig, A. (2022). Towards an understanding multimodal traits of female reproduction in chimpanzees. Primates, 63, 365-376.
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Holzner, A., Rayan, D. M., Moore, J., Tan, C. K. W., Kulik, L., Clart, L., Kühl, H., Ruppert, N., & Widdig, A. (2021). Occupancy of wild southern pig-tailed macaques in intact and degraded forests in Peninsular Malaysia. PeerJ, 9: e12462.
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Amici, F., Widdig, A., von Fersen, L., Lopez Caicoya, A., & Majolo, B. (2021). Intra-specific variation in the social behavior of Barbary macaques (Macaca sylvanus). Frontiers in Psychology, 12.
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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.
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Holzner, A., Balasubramaniam, K. N., Weiß, B. M., Ruppert, N., & Widdig, A. (2021). Oil palm cultivation critically affects sociality in a threatened Malaysian primate. Scientific Reports, 11: 10353.
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Schaffer, A., Caicoya, A. L., Colell, M., Holland, R., von Fersen, L., Widdig, A., & Amici, F. (2021). Neophobia in 10 ungulate specie - a comparative approach. Behavioral Ecology and Sociobiology, 75: 102.
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Amici, F., Widdig, A., MacIntosh, A. J., Francés, V. B., Castellano-Navarro, A., Caicoya, A. L., Karimullah, K., Maulany, R. I., Oka, N. P., Hamzah, A. S., & Majolo, B. (2020). Dominance style only partially predicts differences in neophobia and social tolerance over food in four macaque species. Scientific Reports, 10: 22069.
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Lee, D. S., Mandalaywala, T., Dubuc, C., Widdig, A., & Higham, J. (2020). Higher early life mortality with lower infant body mass in a free-ranging primate. Journal of Animal Ecology, 89(10), 2300-2310.
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Ruppert, N., Holzner, A., & Widdig, A. (2020). Of pig-tails and palm oil: How rat-eating macaques increase oil palm sustainability. The Science Breaker, 6(2).
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Marcillo, A., Weiß, B. M., Widdig, A., & Birkemeyer, C. (2020). Challenges of fast sampling of volatiles for thermal desorption gas chromatography – mass spectrometry. Journal of Chromatography A, 1617: 460822.
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Amici, F., Caicoya, A. L., Majolo, B., & Widdig, A. (2020). Innovation in wild Barbary macaques (Macaca sylvanus). Scientific Reports, 10(1): 4597.
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Young, M. M. I., Winters, S., Young, C., Weiß, B. M., Troscianko, J., Ganswindt, A., Barrett, L., Henzi, S. P., Higham, J. P., & Widdig, A. (2020). Male characteristics as predictors of genital color and display variation in vervet monkeys. Behavioral Ecology and Sociobiology, 74(2): 14.
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Kücklich, M., Weiß, B. M., Birkemeyer, C., Einspanier, A., & Widdig, A. (2019). Chemical cues of female fertility states in a non-human primate. Scientific Reports, 9: 13716.
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Amici, F., & Widdig, A. (2019). An evolutionary perspective on the development of primate sociality. Behavioral Ecology and Sociobiology, 73(8): 116.
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Jänig, S., Weiß, B. M. *., Birkemeyer, C., & Widdig, A. (2019). Comparative chemical analysis of body odor in great apes. American Journal of Primatology, 81: e22976.
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Amici, F., Kulik, L., Langos, D., & Widdig, A. (2019). Growing into adulthood – a review on sex differences in the development of sociality across macaques. Behavioral Ecology and Sociobiology, 73(2): 18.
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Amici, F., Widdig, A. *., Lehmann, J., & Majolo, B. (2019). A meta-analysis of interindividual differences in innovation. Animal Behaviour, 155, 257-268.
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Holzner, A., Ruppert, N., Swat, F., Schmidt, M., Weiß, B. M., Villa, G., Mansor, A., Sah, S. A. M., Engelhardt, A., Kühl, H. S., & Widdig, A. (2019). Macaques can contribute to greener practices in oil palm plantations when used as biological pest control. Current Biology, 29(20), R1066-R1067.
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Minkner, M., Young, C., Amici, F., McFarland, R., Barrett, L., Grober, P., Henzi, S. P., & Widdig, A. (2018). Assessment of male reproductive skew via highly polymorphic STR markers in wild vervet monkeys, Chlorocebus pygerythrus. Journal of Heredity, 109(7), 780-790.
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Kazem, A. J. N., Barth, Y., Pfefferle, D., Kulik, L., & Widdig, A. (2018). Parent-offspring facial resemblance increases with age in rhesus macaques. Proceedings of the Royal Society B: Biological Sciences, 285(1886): 20181208.
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Jänig, S., Weiß, B. M., & Widdig, A. (2018). Comparing the sniffing behavior of great apes. American Journal of Primatology, 80(6): e22872.
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Ruiz-Lambides, A. V. *., Weiß, B. M. *., Kulik, L., & Widdig, A. (2018). Which male and female characteristics influence the probability of extragroup paternities in rhesus macaques? Animal Behaviour, 140, 119-127.
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Peters, K., Worrich, A., Weinhold, A., Alka, O., Balcke, G., Birkemeyer, C., Bruelheide, H., Calf, O. W., Dietz, S., Duehrkop, K., Gaquerel, E., Heinig, U., Kuecklich, M., Kücklich, M., Macel, M., Mueller, C., Poeschl, Y., Pohnert, G., Ristok, C., Rodriguez, V. M., Ruttkies, C., Schuman, M., Schweiger, R., Shahaf, N., Steinbeck, C., Tortosa, M., Treutler, H., Ueberschaar, N., Velasco, P., Weiss, B. M., Widdig, A., Neumann, S., & van Dam, N. M. (2018). Current challenges in plant eco-metabolomics. International Journal of Molecular Sciences, 19(5): 1385.
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Weiß, B. M., Kücklich, M., Thomsen, R., Henkel, S., Jänig, S., Kulik, L., Birkemeyer, C., & Widdig, A. (2018). Chemical composition of axillary odorants reflects social and individual attributes in rhesus macaques. Behavioral Ecology and Sociobiology, 72(4): 65.
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Weiß, B. M., Marcillo, A., Manser, M., Holland, R., Birkemeyer, C., & Widdig, A. (2018). A non-invasive method for sampling the body odour of mammals. Methods in Ecology and Evolution, 9(2), 420-429.
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Marcillo, A., Jakimovska, V., Widdig, A., & Birkemeyer, C. (2017). Comparison of two common adsorption materials for thermal desorption gas chromatography – mass spectrometry of biogenic volatile organic compounds. Journal of Chromatography A, 1514, 16-28.
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Kücklich, M., Möller, M., Marcillo, A., Einspanier, A., Weiß, B. M., Birkemeyer, C., & Widdig, A. (2017). Different methods for volatile sampling in mammals. PLoS One, 12(8): e0183440.
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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). International Journal of Primatology, 38(4), 672-691.
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Ruiz-Lambides, A., Weiß, B. M., Kulik, L., Stephens, C., Mundry, R., & Widdig, A. (2017). Long-term analysis on the variance of extra-group paternities in rhesus macaques. Behavioral Ecology and Sociobiology, 71(4): 67.
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Widdig, A., Muniz, L., Minkner, M., Barth, Y., Bley, S., Ruiz-Lambides, A., Junge, O., Mundry, R., & Kulik, L. (2017). Low incidence of inbreeding in a long-lived primate population isolated for 75 years. Behavioral Ecology and Sociobiology, 71(1): 18.
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Von Borell, C., Kulik, L., & Widdig, A. (2016). Growing into the self: The development of personality in rhesus macaques. Animal Behaviour, 122, 183-195.
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Pfefferle, D., Hammerschmidt, K., Mundry, R., Ruiz-Lambides, A., Fischer, J., & Widdig, A. (2016). Does the structure of female rhesus macaque coo calls reflect relatedness and/or familiarity? PLoS One, 11(8): e0161133.
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Weiß, B. M., Kulik, L., Ruiz-Lambides, A., & Widdig, A. (2016). Individual dispersal decisions affect fitness via maternal rank effects in male rhesus macaques. Scientific Reports, 6: 32212.
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Kerhoas Essens, 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. Behavioral Ecology and Sociobiology, 70(8), 1117-1130.
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Birkemeyer, C. S., Thomsen, R., Jänig, S., Kücklich, M., Slama, A., Weiß, B. M., & Widdig, A. (2016). Sampling the body odor of primates: Cotton swabs sample semivolatiles rather than volatiles. Chemical Senses, 41(6), 525-535.
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Kulik, L., Langos, D., & Widdig, A. (2016). Mothers make a difference: Mothers develop weaker bonds with immature sons than daughters. PLoS One, 11(5): e0154845.
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Widdig, A., Kessler, M. J., Bercovitch, F. B., Berard, J. D., Duggleby, C., Nürnberg, P., Rawlins, R. G., Sauermann, U., Wang, Q., Krawczak, M., & Schmidtke, J. (2016). Genetic studies on the Cayo Santiago rhesus macaques: A review of 40 years of research. American Journal of Primatology, 78(1), 44-62.
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Widdig, A., Langos, D., & Kulik, L. (2016). Sex differences in kin bias at maturation: Male rhesus macaques prefer paternal kin prior to natal dispersal. American Journal of Primatology, 78(1), 78-91.
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Henkel, S., Ruiz-Lambides, A., Berger, A., Thomsen, R., & Widdig, A. (2015). Rhesus macaques (Macaca mulatta) recognize group membership via olfactory cues alone. Behavioral Ecology and Sociobiology, 69(12), 2019-2034.
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Grimm, A. *., Weiß, B. M. *., Kulik, L., Mihoub, J.-B., Mundry, R., Köppen, U., Brueckmann, T., Thomsen, R., & Widdig, A. (2015). Earlier breeding, lower success: does the spatial scale of climatic conditions matter in a migratory passerine bird? Ecology and Evolution, 5(23), 5722-5734.
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Pfefferle, D., Ruiz-Lambides, A., & Widdig, A. (2015). Male rhesus macaques use vocalizations to distinguish female maternal, but not paternal, kin from non-kin. Behavioral Ecology and Sociobiology, 69(10), 1677-1686.
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Langos, D., Kulik, L., Ruiz-Lambides, A., & Widdig, A. (2015). Does male care, provided to immature individuals, influence immature fitness in rhesus macaques? PLoS One, 10(9): e0137841.
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Adams, M. J., Majolo, B., Ostner, J., Schülke, O., De Marco, A., Thierry, B., Engelhardt, A., Widdig, A., Gerald, M. S., & Weiss, A. (2015). Personality structure and social style in macaques. Journal of Personality and Social Psychology, 109(2), 338-353.
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Kulik, L., Amici, F., Langos, D., & Widdig, A. (2015). Sex differences in the development of aggressive behavior in rhesus macaques (Macaca mulatta). International Journal of Primatology, 36(4), 764-789.
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Kulik, L., Amici, F., Langos, D., & Widdig, A. (2015). Sex differences in the development of social relationships in rhesus macaques (Macaca mulatta). International Journal of Primatology, 36(2), 353-376.
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Pfefferle, D., Kazem, A. J. N., Brockhausen, R. R., Ruiz-Lambides, A., & Widdig, A. (2014). Monkeys spontaneously discriminate their unfamiliar paternal relatives under natural conditions using facial cues. Current Biology, 24(15), 1806-1810.
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Pfefferle, D., Ruiz-Lambides, A., & Widdig, A. (2014). Female rhesus macaques discriminate unfamiliar paternal sisters in playback experiments: Support for acoustic phenotype matching. Proceedings of the Royal Society B: Biological Sciences, 281(1774): 20131628.
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Dubuc, C., Ruiz-Lambides, A., & Widdig, A. (2014). Variance in male lifetime reproductive success and estimation of the degree of polygyny in a primate. Behavioral Ecology, 25(4), 878-889.
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Dubuc, C., Winters, S., Allen, W. L., Brent, L. J. N., Cascio, J., Maestripieri, D., Ruiz-Lambides, A., Widdig, A., & Higham, J. P. (2014). Sexually selected skin colour is heritable and related to fecundity in a non-human primate. Proceedings of the Royal Society B: Biological Sciences, 281(1794): 20141602.
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Kerhoas, D., Perwitasari-Farajallah, D., Agil, M., Widdig, A., & Engelhardt, A. (2014). Social and ecological factors influencing offspring survival in wild macaques. Behavioral Ecology, 25(5), 1164-1172.
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Bradley, B. J., Gerald, M. S., Widdig, A., & Mundy, N. I. (2013). Coat color variation and pigmentation gene expression in rhesus macaques (Macaca mulatta). Journal of Mammalian Evolution, 20(3), 263-270.
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Widdig, A. (2013). The Impact of male reproductive skew on kin structure and sociality in multi-male groups. Evolutionary Anthropology, 22(5), 239-250.
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Neumann, C., Agil, M., Widdig, A., & Engelhardt, A. (2013). Personality of wild male crested Macaques (Macaca nigra). PLoS One, 8(8): e69383.
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Langos, D., Kulik, L., Mundry, R., & Widdig, A. (2013). The impact of paternity on male–infant association in a primate with low paternity certainty. Molecular Ecology, 22(13), 3638-3651.
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Kazem, A. J. N., & Widdig, A. (2013). Visual phenotype matching: Cues to paternity are present in rhesus macaque faces. PLoS One, 8(2): e55846.
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Albers, M., & Widdig, A. (2013). The influence of kinship on familiar natal migrant rhesus macaques (Macaca mulatta). International Journal of Primatology, 34(1), 99-114.
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Charpentier, M. J. E., Huchard, E., Widdig, A., Gimenez, O., Sallé, B., Kappeler, P., & Renoult, J. P. (2012). Distribution of affiliative behavior across kin classes and their fitness consequences in mandrills. Ethology, 118(12), 1198-1207.
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Dubuc, C., Muniz, L., Heistermann, M., Widdig, A., & Engelhardt, A. (2012). Do males time their mate-guarding effort with the fertile phase in order to secure fertilisation in Cayo Santiago rhesus macaques? Hormones and Behavior, 61(5), 696-705.
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Kulik, L., Muniz, L., Mundry, R., & Widdig, A. (2012). Patterns of interventions and the effect of coalitions and sociality on male fitness. Molecular Ecology, 21(3), 699-714.
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Dubuc, C., Muniz, L., Heistermann, M., Engelhardt, A., & Widdig, A. (2011). Testing the priority-of-access model in a seasonally breeding primate species. Behavioral Ecology and Sociobiology, 65(8), 1615-1627.
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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(4), 911-921.
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Weiss, A., Adams, M. J., Widdig, A., & Gerald, M. S. (2011). Rhesus macaques (Macaca mulatta) as living fossils of hominoid personality and subjective well-being. Journal of Comparative Psychology, 125(1), 72-83.
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Charpentier, M. J. E., Prugnolle, F., Gimenez, O., & Widdig, A. (2008). Genetic heterozygosity and sociality in a primate species. Behavior Genetics, 38(1), 151-158.
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Charpentier, M. J. E., Widdig, A., & Alberts, S. C. (2007). Inbreeding depression in non-human primates: a historical review of methods used and empirical data. American Journal of Primatology, 69(12), 1370-1386.
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Widdig, A. (2007). Paternal kin discrimination: the evidence and likely mechanisms. Biological Reviews, 82(2), 319-334.
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Widdig, A., Streich, W. J., Nürnberg, P., Croucher, P. J. P., Bercovitch, F. B., & Krawczak, M. (2006). Paternal kin bias in the agonistic interventions of adult female rhesus macaques (Macaca mulatta). Behavioral Ecology and Sociobiology, 61(2), 205-214.
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Widdig, A., Nürnberg, P., Bercovitch, F. B., Trefilov, A., Berard, J. B., Kessler, M. J., Schmidtke, J., Streich, W. J., & Krawczak, M. (2006). Consequences of group fission for the patterns of relatedness among rhesus macaques. Molecular Ecology, 15(12), 3825-3832.
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Krawczak, M., Trefilov, A., Berard, J., Bercovitch, F., Kessler, M., Sauermann, U., Croucher, P., Nürnberg, P., Widdig, A., & Schmidtke, J. (2005). Male reproductive timing in rhesus macaques is influenced by the 5HTTLPR promoter polymorphism of the serotonin transporter gene. Biology of Reproduction, 72(5), 1109-1113.
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Widdig, A., Bercovitch, F. B., Streich, W. J., Sauermann, U., Nürnberg, P., & Krawczak, M. (2004). A longitudinal analysis of reproductive skew in male rhesus macaques. Proceedings of the Royal Society of London B: Biological Sciences, 271(1541), 819-826.
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Bercovitch, F. B., Widdig, A., Trefilov, A., Kessler, M. J., Berard, J. D., Schmidtke, J., Nürnberg, P., & Krawczak, M. (2003). A longitudinal study of age-specific reproductive output and body condition among male rhesus macaques, Macaca mulatta. Naturwissenschaften, 90(7), 309-312.
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Bercovitch, F. B., Widdig, A., Berard, J. D., Nürnberg, P., Kessler, M. J., Schmidtke, J., Trefilov, A., & Krawczak, M. (2002). Multiple sirehood in free-ranging twin rhesus macaques (Macaca mulatta). American Journal of Primatology, 57(1), 31-34.
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Widdig, A., Nürnberg, P., Krawczak, M., Streich, W. J., & Bercovitch, F. (2002). Affiliation and aggression among adult female rhesus macaques: A genetic analysis of paternal cohorts. Behaviour, 139(2), 371-391.
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Widdig, A., Nürnberg, P., Krawczak, M., Streich, W. J., & Bercovitch, F. B. (2001). Paternal relatedness and age proximity regulate social relationships among adult female rhesus macaques. Proceedings of the National Academy of Sciences, 98(24), 13769-13773.
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Sauermann, U., Nürnberg, P., Bercovitch, F., Berard, J., Trefilov, A., Widdig, A., Kessler, M., Schmidtke, J., & Krawczak, M. (2001). Increased reproductive success of MHC class II heterozygous males among free-ranging rhesus macaques. Human Genetics, 108(3), 249-254.
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Bercovitch, F. B., Widdig, A., & Nürnberg, P. (2000). Maternal investment in rhesus macaques (Macaca mulatta): Reproductive costs and consequences of raising sons. Behavioral Ecology and Sociobiology, 48(1), 1-11.
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Widdig, A., Streich, W. J., & Tembrock, G. (2000). Coalition formation among male Barbary macaques (Macaca sylvanus). American Journal of Primatology, 50(1), 37-51.
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Nürnberg, P., Sauermann, U., Kayser, M., Lanfer, C., Manz, E., Widdig, A., Berard, J., Bercovitch, F. B., Kessler, M., Schmidtke, J., & Krawczak, M. (1998). Paternity assessment in rhesus macaques (Macaca mulatta): Multilocus DNA fingerprinting and PCR marker typing. American Journal of Primatology, 44(1), 1-18.
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Widdig, A. (2017). Coefficient of Relatedness. In J. Vonk, & T. K. Shackelford (Eds.), Encyclopedia of Animal Cognition and Behavior. Cham: Springer International Publishing.
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Dubuc, C., Ruiz-Lambides, A., & Widdig, A. (2013). Male lifetime reproductive success and opportunity of selection in rhesus macaques of the free-ranging population of Cayo Santiago. American Journal of Primatology, 75(Suppl. 1), 63-63.
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Kerhoas, D., Perwitasari-Farajallah, D., Agil, M., Widdig, A., & Engelhardt, A. (2013). The interaction of social and ecological parameters on foetal and infant survival in wild crested macaques. Folia primatologica, 84(3-5), 291-292.
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Muniz, L., Ruiz-Lambides, A., Gonzalez-Martinez, J., & Widdig, A. (2012). Should I Stay or Should I Go? Fitness Outcome of Male Rhesus Macaques Migration Strategies. Folia primatologica, 82, 260-261.
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Widdig, A., Alberts, S. C., Nürnberg, P., & Krawczak, M. (2008). Do mothers promote social preference among their paternally related offspring?: Testing mechanisms of paternal kin discrimination. Folia Primatologica, 79(5), 398-398.
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Widdig, A. (2002). Paternal kinship among adult female rhesus macaques (Macaca mulatta). PhD Thesis, Humboldt-Univ., Berlin.
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