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- Publications
- Influence
Fission‐Fusion Dynamics
- F. Aureli, C. Schaffner, +16 authors C. Schaik
- Sociology
- Current Anthropology
- 1 August 2008
Renewed interest in fission‐fusion dynamics is due to the recognition that such dynamics may create unique challenges for social interaction and distinctive selective pressures acting on underlying… Expand
Group size, grooming and social cohesion in primates
- J. Lehmann, A. Korstjens, R. Dunbar
- Psychology
- Animal Behaviour
- 1 December 2007
Most primates live in social groups in which affiliative bonds exist between individuals. Because these bonds need to be maintained through social interactions (grooming in most primates), sociality… Expand
Resting time as an ecological constraint on primate biogeography
- A. Korstjens, J. Lehmann, R. Dunbar
- Biology
- Animal Behaviour
- 1 February 2010
Time constraints can limit an animal's potential to survive in a given habitat and the maximum size of its group. Many studies have, therefore, investigated the ecological correlates of time… Expand
Sociality of the dispersing sex: the nature of social bonds in West African female chimpanzees, Pan troglodytes
- J. Lehmann, C. Boesch
- Psychology
- Animal Behaviour
- 1 February 2009
Patterns of group social structure are often linked to the competitive regime within a social unit and to the availability of kin. In line with this, many studies have shown that the dispersing sex,… Expand
Fission–fusion social systems as a strategy for coping with ecological constraints: a primate case
- J. Lehmann, A. Korstjens, R. Dunbar
- Biology
- Evolutionary Ecology
- 1 September 2007
Fission–fusion social systems, in which members of a social community form frequently changing subgroups, occur in a number of mammalian taxa. Such systems are assumed to be a response to the costs… Expand
Sex differences in the acoustic startle response and prepulse inhibition in Wistar rats
- J. Lehmann, C. Pryce, J. Feldon
- Psychology, Medicine
- Behavioural Brain Research
- 1 October 1999
The prepulse inhibition paradigm (PPI) is based on the phenomenon that the acoustic startle response (ASR) to an acoustic stimulus is reduced when the stimulus is preceded by a weak prepulse. It has… Expand
Behavioral and trait rating assessments of personality in common marmosets (Callithrix jacchus).
- S. Iwanicki, J. Lehmann
- Psychology, Medicine
- Journal of comparative psychology
- 15 June 2015
The study of personality in animals is a rapidly growing scientific field and numerous species have been reported to show consistent personality profiles. Much animal personality research has focused… Expand
Long-term effects of prenatal stress experience and postnatal maternal separation on emotionality and attentional processes
- J. Lehmann, T. Stöhr, J. Feldon
- Psychology, Medicine
- Behavioural Brain Research
- 31 January 2000
Postnatal environmental manipulations naturally occur on the background of prenatal experiences. In the laboratory rat, both pre- and postnatal environmental manipulations have been shown to alter… Expand
Effect of Sex on Fear Conditioning is Similar for Context and Discrete CS in Wistar, Lewis and Fischer Rat Strains
- C. Pryce, J. Lehmann, J. Feldon
- Psychology, Medicine
- Pharmacology Biochemistry and Behavior
- 1 December 1999
Enhanced fear in males relative to females, both innate and conditioned, is a well-described characteristic of behavior in the laboratory rat. In the case of aversive conditioning to foot shock in… Expand
The effects of social network position on the survival of wild Barbary macaques, Macaca sylvanus
- J. Lehmann, B. Majolo, Richard McFarland, Richard McFarland
- Biology
- 2016
It has long been shown that the social environment of individuals can have strong effects on health, well-being, and longevity in a wide range of species. Several recent studies found that an… Expand