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Swedell Publications

Peer-Reviewed Journal Articles & Book Chapters:

(pdfs available on Academia.edu and ResearchGate or by contacting the author)

Amann, A., Pines, M., & Swedell, L. (2017) Contexts and consequences of takeovers in hamadryas baboons: female parity, reproductive state, and observational evidence of pregnancy loss. American Journal of Primatology 79:e22649 (DOI: 10.1002/ajp.22649).

Swedell, L. & Chowdhury, S. (2016) Hamadryas Baboon: Papio hamadryas.  IN All the World’s Primates, edited by N. Rowe & M. Myers.  Charlestown, RI: Pogonias Press, pp. 436-437.

Städele, V., Pines, M., Swedell, L., & Vigilant, L. (2016) The ties that bind: Maternal kin bias in a multilevel primate society despite natal dispersal by both sexes. American Journal of Primatology 78: 731-744 (DOI: 10.1002/ajp.22537).

Chowdhury, S., Pines, M., Saunders, J., & Swedell, L. (2015) The adaptive value of secondary males in the polygynous multi-level society of hamadryas baboons. American Journal of Physical Anthropology 158: 501-513 (DOI: 10.1002/ajpa.22804).

Städele, V., Van Doren, V., Pines, M., Swedell, L., & Vigilant, L. (2015) Fine-scale genetic assessment of sex-specific dispersal patterns in a multilevel primate society.  Journal of Human Evolution 78: 103-113 (DOI: http://dx.doi.org/10.1016/j.jhevol.2014.10.019).

Pines, M., Chowdhury, S., Saunders, J., & Swedell, L. (2015) The rise and fall of leader males in a multi-level society: takeovers and tenures of male hamadryas baboons. American Journal of Primatology 77: 44-55 (DOI: 10.1002/ajp.22309).

Swedell, L., Leedom, L., Saunders, J., & Pines, M. (2014) Sexual conflict in a polygynous primate: costs and benefits of a male-imposed mating system. Behavioral Ecology and Sociobiology 68: 263-273 (DOI: 10.1007/s00265-013-1641-3).

Johnson, C.A., Raubenheimer, D., Rothman, J.M., Clarke, D, & Swedell, L. (2013) 30 days in the life: daily nutrient balancing in a wild chacma baboon.  PLOS One 8(7): e70383 (DOI: 10.1371/journal.pone.0070383).

Swedell, L. (2013) Hamadryas Baboon (Papio hamadryas).  IN The Mammals of Africa, Vol. 2, Primates.  edited by T. Butynski, J. Kingdon, & J. Kalina.  London: Bloomsbury Publishing, pp. 221-224. 

Swedell, L. (2012) Primate Sociality and Social Systems. Nature Education Knowledge 3(10): 84 (http://www.nature.com/scitable/knowledge/library/primate-sociality-and-social-systems-58068905).

Matsuda, I., Zhang, P., Swedell, L., Mori, U., Tuuga, A., Bernard, H., & Sueur, C. (2012) Comparisons of intraunit relationships in nonhuman primates living in multilevel social systems.  International Journal of Primatology 33: 1038-1053 (DOI: 10.1007/s10764-012-9616-1).

Swedell, L. & Plummer, T. (2012) A papionin multilevel society as a model for hominin social evolution. International Journal of Primatology 33: 1165-1193 (DOI: 10.1007/s10764-012-9600-9).

Schreier, A. & Swedell, L. (2012b) The socioecology of network scaling ratios in the multilevel society of hamadryas baboons. International Journal of Primatology 33: 1069-1080 (DOI: 10.1007/s10764-011-9572-1).

Johnson, C., Swedell, L., & Rothman, J. (2012) Feeding ecology of olive baboons (Papio anubis) in the Kibale Forest, Uganda: Preliminary results on diet and food selection.  African Journal of Ecology 50: 367-370 (DOI: 10.1111/j.1365-2028.2011.01316.x).

Schreier, A., & Swedell, L. (2012a) Ecology and sociality in a multilevel society: Ecological determinants of spatial cohesion in hamadryas baboons.  American Journal of Physical Anthropology 148: 580-588 (DOI: 10.1002/ajpa.22076).

Pines, M., Saunders, J., & Swedell, L. (2011) Alternative routes to the leader male role in a multi-level society: Follower versus solitary male strategies and outcomes in hamadryas baboons.  American Journal of Primatology 73: 679-691 (DOI: 10.1002/ajp.20951).

Pines, M. & Swedell, L.  (2011) Not without a fair fight: Failed abductions of females in wild hamadryas baboons.  Primates 52: 249-252 (DOI: 10.1007/s10329-011-0242-x).

Swedell, L., Saunders, J., Schreier, A., Davis, B., Tesfaye, T., & Pines, M. (2011) Female “dispersal” in hamadryas baboons: Transfer among social units in a multilevel society. American Journal of Physical Anthropology 145: 360-370 (DOI: 10.1002/ajpa.21504).

Swedell, L. (2011) African Papionins: Diversity of Social Organization and Ecological Flexibility.  IN Primates in Perspective, Second Edition, edited by C. Campbell, A. Fuentes, K. MacKinnon, S. Bearder, & R. Stumpf.  New York: Oxford University Press, pp. 241-277.  (released April 2010)

van Doorn, A., O’Riain, M.J., & Swedell, L. (2010) The Effects of Extreme Seasonality of Climate and Day Length on the Activity Budget and Diet of Semi-Commensal Chacma Baboons (Papio ursinus) in the Cape Peninsula of South Africa. American Journal of Primatology 72(2): 104-112 (https://doi.org/10.1002/ajp.20759).

Schreier, A. & Swedell, L. (2009) The Fourth Level of Social Structure in a Multi-Level Society: Ecological and Social Functions of Clans in Hamadryas Baboons. American Journal of Primatology 71: 948-955 (https://doi.org/10.1002/ajp.20736) .

Swedell, L. & Schreier, A. (2009) Male Aggression Towards Females in Hamadryas Baboons: Conditioning, Coercion, and Control. IN Sexual Coercion in Primates and Humans: An Evolutionary Perspective on Male Aggression Against Females, edited by M. Muller and R. Wrangham.  Cambridge: Harvard University Press, pp. 244-268.

Swedell, L., Hailemeskel, G., & Schreier, A. (2008) Composition and Seasonality of Diet in Wild Hamadryas Baboons: Preliminary Findings from Filoha. Folia Primatologica 79: 476-490 (https://doi.org/10.1159/000164431).

Schreier, A. & Swedell, L. (2008) Use of Palm Trees as a Sleeping Site by Hamadryas Baboons in Ethiopia.  American Journal of Primatology 70: 107-113 (https://doi.org/10.1002/ajp.20465).

Swedell, L. & Leigh, S., editors. (2006)  Reproduction and Fitness in Baboons: Behavioral, Ecological, and Life History Perspectives.  New York: Springer (doi:10.1007/978-0-387-33674-9).

Swedell, L. & Leigh, S. (2006) Perspectives on Reproduction and Life History in Baboons. IN Reproduction and Fitness in Baboons: Behavioral, Ecological, and Life History Perspectives, edited by L. Swedell & S. Leigh. New York: Springer, pp. 1-15 (doi:10.1007/978-0-387-33674-9_1).

Swedell, L. & Saunders, J. (2006) Infant mortality, paternity certainty, and female reproductive strategies in hamadryas baboons. IN Reproduction and Fitness in Baboons: Behavioral, Ecological, and Life History Perspectives, edited by L. Swedell & S. Leigh.  New York: Springer, pp. 19-51 (doi: 10.1007/978-0-387-33674-9_2).

Swedell, L. (2006) Strategies of Sex and Survival in Hamadryas Baboons: Through a Female Lens, Upper Saddle River, NJ: Pearson Prentice Hall.

Swedell, L. & Tesfaye, T. (2003) Infant mortality after takeovers in wild Ethiopian hamadryas baboons. American Journal of Primatology 60: 113-118 (https://doi.org/10.1002/ajp.10096).

Swedell, L. (2002a) Affiliation among females in wild hamadryas baboons (Papio hamadryas hamadryas). International Journal of Primatology 23: 1205-1226 (doi:10.1023/A:1021170703006).

Swedell, L. (2002b) Ranging behavior, group size, and behavioral flexibility in Ethiopian hamadryas baboons (Papio hamadryas hamadryas).  Folia Primatologica 73:95-103 (https://doi.org/10.1159/000064787).

Swedell, L. (2000) Two takeovers in wild hamadryas baboons. Folia Primatologica 71: 169-172.

Swedell, L. (1997) Patterns of reconciliation among captive gelada baboons (Theropithecus gelada).  Primates 38(3): 327-332.


pdfs available on Academia.edu and ResearchGate


Abstracts of Conference Presentations:

Chowdhury, S. & Swedell, L. (2019) Hormones from noninvasively collected samples to assess physiological responses to social, environmental and anthropogenic stressors in non-human primates. American Journal of Physical Anthropology Supplement 68 (Invited symposium poster submitted for the 88th annual meeting of the American Association of Physical Anthropologists, Cleveland, OH, March 2019).

Chowdhury, S. & Swedell, L. (2018) Living with climate extremes and behavioral coping in a population of chacma baboons in South Africa. American Journal of Physical Anthropology Supplement 66: 49 (Paper presented at the 87th annual meeting of the American Association of Physical Anthropologists, Austin, TX).

Henriquez, M. & Swedell, L. (2018) Twenty years of ranging patterns in hamadryas baboons: A modern take in a changing climate. American Journal of Physical Anthropology Supplement 66: 117 (Poster presented at the 87th annual meeting of the American Association of Physical Anthropologists, Austin, TX).

Johnson, C., Raubenheimer, D., Swedell, L., & Rothman, J. (2018) Forest baboons maximize energy and prioritize protein: implications for evolution of human diet. American Journal of Physical Anthropology Supplement 66: 133-134 (Paper presented at the 87th annual meeting of the American Association of Physical Anthropologists, Austin, TX).

Shattuck, Eric C., Swedell, L., & Foerster, S. (2018) The behavioral costs of parasitism in female chacma baboons (Papio ursinus). American Journal of Physical Anthropology Supplement 66: 250 (Poster presented at the 87th annual meeting of the American Association of Physical Anthropologists, Austin, TX).

Chowdhury, S. & Swedell, L. (2017) Coping with death: behavioral mitigation of the loss of an alpha male by female chacma baboons in South Africa. American Journal of Physical Anthropology Supplement 64: 143 (Paper presented at the 86th annual meeting of the American Association of Physical Anthropologists, New Orleans, LA).

Schreier, A., Schlaht, R. M., & Swedell, L. (2017) Meat-eating in hamadryas baboons: temporal patterns of meat consumption and doum palm fruit availability. American Journal of Physical Anthropology Supplement 64: 349-350 (Poster presented at the 86th annual meeting of the American Association of Physical Anthropologists, New Orleans, LA).

Swedell, L. & Plummer, T. (2017) Hamadryas baboons as analogs for social evolution in early Homo. American Journal of Physical Anthropology Supplement 64: 375 (Paper presented at the 86th annual meeting of the American Association of Physical Anthropologists, New Orleans, LA).

Chowdhury, S. & Swedell, L. (2016) Anthropogenic stress in female chacma baboons in the Cape Peninsula of South Africa. Proceedings of the XXVIth Congress of the International Primatological Society, Abstract #7066 (paper at 2016 annual meeting of the International Primatological Society).

McCann, C., Amann, A., Bergman, T., Lu, A., Swedell, L., & Beehner, J. (2016) The physiology of captive geladas highlights the evolutionary adaptations of wild geladas (Theropithecus gelada). Proceedings of the XXVIth Congress of the International Primatological Society (paper at 2016 annual meeting of the International Primatological Society).

Swedell, L. & Plummer, T. (2016) Multilevel societies and hominin social evolution: insights from hamadryas baboons. Poster presented at the annual meeting of the Paleoanthropology Society, Atlanta, GA.

Bryer, M.A.H, Swedell, L., & Chowdhury, S. (2016) Fatty Food or fertile females? Consortships and raiding behavior in male chacma baboons in the Cape Peninsula, South Africa. American Journal of Physical Anthropology Supplement 62: 104 (Poster presented at the annual meeting of the American Association of Physical Anthropologists, Atlanta, GA).

Ekanayake-Weber, M. & Swedell, L. (2016) Female power in a male-dominated society: Simulating how female kin reunite in hamadryas baboons. American Journal of Physical Anthropology Supplement 62: 137 (Paper presented at the annual meeting of the American Association of Physical Anthropologists, Atlanta, GA).

Steiniche, T., Swedell, L., & Foerster, S. (2016) Energy balance across the estrus cycle and its relation to reproductive function in female chacma baboons. American Journal of Physical Anthropology Supplement 62: 302 (Paper presented at the annual meeting of the American Association of Physical Anthropologists, Atlanta, GA).

Chowdhury, S. & Swedell, L. (2015) Effects of male social upheaval on social bonds and stress in female chacma baboons. American Journal of Physical Anthropology Supplement 60: 106 (paper in “Females: Friends or foes? New perspectives on female bonds in primates" poster symposium co-chaired by Michelle Rodrigues and Monica Wakefield at 2015 annual meeting of the American Association of Physical Anthropologists, St. Louis, MO).

Staedele, V., Vigilant, L, & Swedell, L. (2015) Female friendships in a ‘non-female-bonded’ cercopithecine: genetic correlates of sociality and female choice in hamadryas baboons. American Journal of Physical Anthropology Supplement 60: 296 (paper in “Females: Friends or foes? New perspectives on female bonds in primates” poster symposium co-chaired by Michelle Rodrigues and Monica Wakefield at 2015 annual meeting of the American Association of Physical Anthropologists, St. Louis, MO).

Davis, G., Swedell, L., & Kolluru, G. (2014) Behavioral variation across contexts in male chacma baboons. Poster presentation in Undergraduate Research Symposium, California Polytechnic University.

Vergamini, M., & Swedell, L. (2014) Changing trends in Papio ursinus subadult male consortship patterns in the Tokai Forest, Cape Peninsula, South Africa. Paper in Undergraduate Research Symposium, 2014 annual meeting of the American Association of Physical Anthropologists, Calgary.

Amann, A., Pines, M., & Swedell, L. (2014) Female takeovers in hamadryas baboons: Consequences and counterstrategies. American Journal of Physical Anthropology Supplement 58: 66 (poster in “A change of scene: Group takeovers and alpha male replacements in primates” symposium co-chaired by Katharine Jack and Julie Teischroeb at 2014 annual meeting of the American Association of Physical Anthropologists).

Chowdhury, S., Pines, M., Saunders, J., Swedell, L. (2013) To commit or play the field? costs and benefits of male mating strategies in hamadryas versus chacma baboons. American Journal of Physical Anthropology Supplement 56: 98-99 (paper in Georgiev, A. and Emery Thompson, M (Chairs), The high price of success: Costs of male reproductive effort in male primates and humans, Invited podium symposium at 2013 annual meeting of American Association of Physical Anthropologists).

Britton, G.A.O., Yeoman, C.J., Fashing, P.J., Nguyen, N., Swedell, L., White, B.A., Wilson, B.A., Stumpf, R.M., Nelson, K.E., Torralba, M., Gillis, M., Leigh, S.R., Dominy, N.J. (2013) Microbial adaptations facilitate non-ruminant Theropithecus gelada grazing behavior in northern Ethiopia. American Journal of Physical Anthropology Supplement 56: 88-89 (paper at 2013 meeting of American Association of Physical Anthropologists).

Chowdhury, S., & Swedell, L. (2012) Social stability in the face of environmental and social instability: social network analysis of a small troop of raiding chacma baboons (Papio ursinus) in the Cape Peninsula of South Africa and implications for wildlife management. Proceedings of the XXIVth Congress of the International Primatological Society (talk at 2012 meeting of the International Primatological Society).

Matsuda, I., Zhang, P., Swedell, L., Mori, U., Tuuga, A., Bernard, H., & Sueur, C. (2012) A comparison of intra-unit relationships between colobines and the cercopithecines with multi-level social systems: Effects of female dispersal patterns. Proceedings of the XXIVth Congress of the International Primatological Society (talk at 2012 meeting of the International Primatological Society).

Johnson, C.A., Clarke, D., Rebeiro, B., Rothman, J. M., & Swedell, L. (2012) Nutritional composition of foods eaten by chacma baboons in the Tokai Forest of the Cape Peninsula, South Africa. American Journal of Physical Anthropology Supplement 54: 175 (poster at 2012 meeting of American Association of Physical Anthropologists).

Chowdhury, S. & Swedell, L. (2011) Intertroop dynamics and sociality of suburban chacma baboons in the Cape Peninsula. Abstract available at www.peggweb.com (talk at 2011 Annual Meeting of South African Primate Ecology and Genetics Group).

Johnson, C., Swedell, L., & Rothman, J. (2011) Feeding ecology of olive baboons in the Kibale forest: preliminary results on diet and food selection. American Journal of Physical Anthropology Supplement 52: 179 (poster at 2011 meeting of American Association of Physical Anthropologists).

van Doorn, A.C., O’Riain, M.J., Swedell, L. (2010) Behaving, but at what cost? The effects of a management technique on a chacma baboon troop in South Africa. Proceedings of the XXIIIth Congress of the International Primatological Society (talk at 2010 meeting of the International Primatological Society).

Schreier, A.L., Swedell, L. (2010) Food distribution and social cohesion in hamadryas baboons: Testing the assumptions behind the evolution of hamadryas social structure. Proceedings of the XXIIIth Congress of the International Primatological Society (talk at 2010 meeting of the International Primatological Society).

Schreier, A.L., Swedell, L. (2010) Resource availability and social structure in wild hamadryas baboons. American Journal of Physical Anthropology Supplement 50: 209 (poster at 2010 meeting of American Association of Physical Anthropologists).

Swedell, L., Plummer, T. (2009) Hamadryas baboons as an analog for social evolution in Homo erectus. American Journal of Physical Anthropology Supplement 48: 362 (abstract).

Stephenson, J., Swedell, L., O’Riain, M.J. (2008) Behavioral indicators of stress in female chacma baboons: Social structure, female reproductive state, and human impact. American Journal of Physical Anthropology Supplement 46: 200 (abstract).

Steiper, M., Swedell, L., Chowdhury, S., & Garrett, E. (2008) A comparison of inexpensive methods for obtaining DNA from the feces of baboons. American Journal of Physical Anthropology Supplement 46: 200 (abstract).

Swedell, L., Saunders, J., Pines, M., Schreier, A., & Davis, B. (2008) Alternative reproductive strategies in male hamadryas baboons: Leaders, followers, and solitary males. American Journal of Physical Anthropology Supplement 46: 203 (abstract).

Schreier, A. & Swedell, L. (2007) Evidence for Clans in a Population of Wild Hamadryas Baboons. American Journal of Physical Anthropology Supplement 44: 209-210 (abstract).

Swedell, L. & Schreier, A. (2006) Male Aggression Towards Females in Hamadryas Baboons. Proceedings of the XXIth Congress of the International Primatological Society (abstract).

Swedell, L. (2005) Dispersal by Force: Residence Patterns of Wild Female Hamadryas Baboons. American Journal of Physical Anthropology Supplement 40: 202 (abstract).

Swedell, L. & Saunders, J. (2003) Female Reproductive Strategies in Hamadryas Baboons: Paternity Certainty, Infanticide Avoidance, and Copulation Calls. American Journal of Physical Anthropology Supplement 36: 204 (abstract).

Swedell, L. (2002) Reproductive Parameters and Asynchronous Reproduction in Wild Hamadryas Baboons. American Journal of Physical Anthropology Supplement 34: 152 (abstract).

Nystrom, P., Swedell, L., Phillips-Conroy, J., & Jolly, C. (2002) Dental Microwear Patterns in Hamadryas and Anubis Baboons. American Journal of Physical Anthropology Supplement 34: 119 (abstract).

Swedell, L. & Woolley-Barker, T. (2001) Dispersal and Philopatry in Hamadryas Baboons: A Re-Evaluation Based on Behavioral and Genetic Evidence. American Journal of Physical Anthropology Supplement 32: 146 (abstract).

Swedell, L. (2000) Social Interactions Among Female Hamadryas Baboons: Implications for the Evolution of Hamadryas Baboon Social Organization. American Journal of Physical Anthropology Supplement 30: 297-298 (abstract).

Swedell, L. (1999) Female Friendships in a Non-Female-Bonded Species: Social Relationships Between Females in Wild Hamadryas Baboons, Papio hamadryas hamadryas. American Journal of Primatology 49: 106-107 (abstract).

Swedell, L. (1999) Two Takeovers in Wild Hamadryas Baboons (Papio hamadryas hamadryas) and the Subsequent Re-Acquisition of a Female by a Deposed Leader Male. American Journal of Primatology 49(1):107 (abstract).

Keane, B., Valderrama, X., Swedell, L., Dittus, W., & Melnick, D. (1994) Paternity Exclusion in Wild Toque Macaques Using Genetic Markers. American Journal of Physical Anthropology Supplement 18:120 (abstract).