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Zuberbühler, Klaus

Nom
Zuberbühler, Klaus
Affiliation principale
Fonction
Professeur ordinaire
Email
klaus.zuberbuehler@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/670
_
0000-0001-8378-088X

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  • Publication
    Métadonnées seulement
  • Publication
    Métadonnées seulement
    How Intentional Are Chimpanzee Vocalizations?
    (2015)
    Crockford, Catherine
    ;
    Wittig, Roman
    ;
    Zuberbühler, Klaus 
  • Publication
    Métadonnées seulement
    Food sharing is linked to urinary oxytocin levels and bonding in related and unrelated wild chimpanzees
    (2014)
    Wittig, Roman M.
    ;
    Crockford, Catherine
    ;
    Deschner, Tobias
    ;
    Langergraber, Kevin E.
    ;
    Ziegler, Toni E.
    ;
    Zuberbühler, Klaus 
    Humans excel in cooperative exchanges between unrelated individuals. Although this trait is fundamental to the success of our species, its evolution and mechanisms are poorly understood. Other social mammals also build long-term cooperative relationships between non-kin, and recent evidence shows that oxytocin, a hormone involved in parent-offspring bonding, is likely to facilitate non-kin as well as kin bonds. In a population of wild chimpanzees, we measured urinary oxytocin levels following a rare cooperative event-food sharing. Subjects showed higher urinary oxytocin levels after single food-sharing events compared with other types of social feeding, irrespective of previous social bond levels. Also, urinary oxytocin levels following food sharing were higher than following grooming, another cooperative behaviour. Therefore, food sharing in chimpanzees may play a key role in social bonding under the influence of oxytocin. We propose that food-sharing events co-opt neurobiological mechanisms evolved to support mother-infant bonding during lactation bouts, and may act as facilitators of bonding and cooperation between unrelated individuals via the oxytocinergic system across social mammals.
  • Publication
    Métadonnées seulement
    Genetic analyses suggest no immigration of adult females and their offspring into the Sonso community of chimpanzees in the Budongo Forest Reserve, Uganda
    (2014)
    Langergraber, Kevin E.
    ;
    Rowney, Carolyn
    ;
    Crockford, Catherine
    ;
    Wittig, Roman
    ;
    Zuberbühler, Klaus 
    ;
    Vigilant, Linda
    Chimpanzees are frequently used to illustrate the relationship between sex differences in dispersal and sex differences in cooperation in primates and other group-living mammals. Male chimpanzees are highly philopatric, typically remaining in their natal communities for their entire lives to cooperate with related males in competition against less related males from other groups, whereas females typically disperse once at adolescence and cooperate with each other less frequently. However, there have been a few reports of dependent male offspring joining groups when their mothers transferred between communities as adults. Although such events are difficult to document, determining how often they actually occur is important for elucidating the links between philopatry, kinship, and cooperation in both chimpanzees and group-living animals more generally. Here we use genetic analyses to investigate a previous report of a large-scale transfer of many females and their offspring into the Sonso community of chimpanzees in the Budongo Forest Reserve, Uganda. Using autosomal microsatellite genotypes, we assigned a Sonso father to ten of the fourteen putative immigrants, and found that the four putative immigrants for whom we could not assign a Sonso father (perhaps due to incomplete sampling of all Sonso candidate fathers) nevertheless had Y-chromosome microsatellite haplotypes that were common in Sonso males but absent in males from four other chimpanzee communities at Budongo. These results suggest that these putative immigrant females and their offspring were probably actually long-term residents of Sonso whose identifications were delayed by their peripheral or unhabituated status. These results are consistent with other genetic and behavioral evidence showing that male between-community gene flow is exceedingly rare in east African chimpanzees. Am. J. Primatol. 76:640-648, 2014. (c) 2014 Wiley Periodicals, Inc.
  • Publication
    Métadonnées seulement
  • Publication
    Métadonnées seulement
    Wild Chimpanzees Inform Ignorant Group Members of Danger
    (2012)
    Crockford, Catherine
    ;
    Wittig, Roman M.
    ;
    Mundry, Roger
    ;
    Zuberbühler, Klaus 
    The ability to recognize other individuals' mental states their knowledge and beliefs, for example is a fundamental part of human cognition and may be unique to our species. Tests of a "theory of mind" in animals have yielded conflicting results [1-3]. Some nonhuman primates can read others' intentions and know what others see, but they may not understand that, in others, perception can lead to knowledge [1-3]. Using an alarm-call-based field experiment, we show that chimpanzees were more likely to alarm call in response to a snake in the presence of unaware group members than in the presence of aware group members, suggesting that they recognize knowledge and ignorance in others. We monitored the behavior of 33 individuals to a model viper placed on their projected travel path. Alarm calls were significantly more common if the caller was with group members who had either not seen the snake or had not been present when alarm calls were emitted. Other factors, such as own arousal, perceived risk, or risk to receivers, did not significantly explain the likelihood of calling, although they did affect the call rates. Our results suggest that chimpanzees monitor the information available to other chimpanzees and control vocal production to selectively inform them.
  • Publication
    Métadonnées seulement
    A Physiological Mechanism to Promote Social Bonding between Non-Kin: Evidence from Wild Chimpanzees
    (2011)
    Crockford, Catherine
    ;
    Wittig, Roman M.
    ;
    Ziegler, T.
    ;
    Deschner, Tobias
    ;
    Zuberbühler, Klaus