Research output per year

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Personal profile


  • Diploma (Bsc and MRes equivalent) in Zoology (Philips University Marburg, Germany)
  • PhD in Natural Sciences (Swiss Federal Institute of Technology, Zurich, Switzerland)
  • MSc in Applied Statstics (Swiss Federal Institute of Technology, Zurich, Switzerland)

Research interests

My research is concerned with the evolution of sociality and the factors influencing social organisation in mammals, including humans. These can be ecological factors as well as demographic effects. I am especially interested in social dynamics/social networks and relationships within and between species. My long-term research interest is in the evolution of mammalian sociality and how social cohesion can be maintained in dispersed living animals. I am using a combination of different methods to study these topics, such as experimental studies, behavioural observations, comparative approaches, phylogenetic, mathematical and agent-based modelling and social network analysis. Research questions I have worked on in the past include the following topics: i) Survival versus reproductive success: sex differences in behavioural and physiological strategies in infants (Marmota marmota) ; ii) Long-term biobehavioural consequences of early environmental manipulations (Rattus norvegicus). ore recently I have ben looking at questions related to effects of group size and composition on behaviour; friendships in primates; intra-group competition, coping strategies, activity co-ordination,and the importance of social networks in primate communities; primate biogeography and responses to climte change. Currently, I am working on the projects related to

i) the importance of social network position for individual survival (with R MacFarland, Pretoria University), reproductive success (with C. Ross) and health (with C. Berbesque)

ii) effects of intra-group competition on social networks (with B. Majolo, Lincoln University)

iii) network plasticity and complexity (several collaborators)

iv) the importance of information exchange in shaping dynamics systems (with J. Bryson, Bath University)

Current PhD students

  • Piotr Fedurek:Social networks and health in an egalitarian hunter-gatherer society; Co-supervised with Dr Colette Berbesque

Past PhD students

  • Charlotte Carne (2014): Modelling approaches to primate conservation; Co-supervised with Prof Stuart Semple
  • Nienke Alberts (2012): Fission-fusion sociality among olive baboons in Gashaka-Gumti National Park, Nigeria;Co-supervised with Prof Stuart Semple

Professional affiliations

  • Fellow of the HEA
  • Past treasurer of EFP
  • Past Council member of PSGB


Primatology, Zoology, Reseach Methods, Statistics, Animal Behaviour
I am currently teaching on the following modules:

UG Year 1
Being Human
Key skills in Anthropology

Core skills in Zoology

UG Year 2
Bio and Health Sciences Research Methods
Understanding Behaviour
The Brain in Health and Disease

UG year 3
Primate Biology & Cognition

PG Primate Biology, Behaviour and Conservation (all modules)

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Research Output

Effect of Group Size and Individual Characteristics on Intergroup Encounters in Primates

Majolo, B., deBertoli Vizioli, A., Martinez-Inigo, L. & Lehmann, J., 6 Jan 2020, In : INTERNATIONAL JOURNAL OF PRIMATOLOGY.

Research output: Contribution to journalArticle

Open Access
4 Downloads (Pure)

A meta-analysis of inter-individual differences in innovation

Amici, F., Widdig, A., Lehmann, J. & Majolo, B., 6 Sep 2019, In : ANIMAL BEHAVIOUR. 155, p. 257-268

Research output: Contribution to journalArticle

Environment and Time as Constraints on the Biogeographical Distribution of Gibbons

Dunbar, R. I. M., Cheyne, S., Lan, D., Korstjens, A. H., Lehmann, J. & Cowlishaw, G., 3 Jan 2019, In : AMERICAN JOURNAL OF PRIMATOLOGY. 81, 1

Research output: Contribution to journalArticle

Open Access
31 Downloads (Pure)

Measuring personality in the field: An in situ comparison of personality quantification methods in wild Barbary Macaques (Macaca sylvanus)

Tkaczynski, P., Ross, C., MacLarnon, A., Majolo, B., Mouna, M. & Lehmann, J., Aug 2019, In : JOURNAL OF COMPARATIVE PSYCHOLOGY. 133, 3, p. 313-325

Research output: Contribution to journalArticle

Open Access
129 Downloads (Pure)

Repeatable glucocorticoid expression is associated with behavioural syndromes in males but not females in a wild primate

Tkaczynski, P., Ross, C., Lehmann, J., Mouna, M., Majolo, B. & MacLarnon, A., 4 Sep 2019, In : Royal Society Open Science. 6, 9

Research output: Contribution to journalArticle

Open Access


Fission fusion dynamics of olive baboons (Papio anubis) in Gashaka Gumti National Park

Author: Alberts, N., 7 Jan 2013

Supervisor: Semple, S. (Supervisor) & Lehmann, J. (Supervisor)

Student thesis: Doctoral Thesis


Modelling Approaches to Primate Conservation

Author: Carne, C., 6 Jun 2014

Supervisor: Semple, S. (Supervisor) & Lehmann, J. (Supervisor)

Student thesis: Doctoral Thesis