Publicaties
Gekozen filters:
Gekozen filters:
Evaluating Self-Directed Behaviours and Their Association with Emotional Arousal across Two Cognitive Tasks in Bonobos (Pan paniscus) Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Antwerpen
Self-directed behaviours (SDBs) are widely used as markers of emotional arousal in primates, and are commonly linked to negative arousal, or are used as indicators of stress or poor welfare. However, recent studies suggest that not all SDBs have the same function. Moreover, lateralisation in the production of these behaviours has been suggested to be associated with emotional processing. Hence, a better understanding of the production and the ...
Hand pressures during arboreal locomotion in captive bonobos (Pan paniscus) Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Antwerpen
Evolution of the human hand has undergone a transition from use during locomotion to use primarily for manipulation. Previous comparative morphological and biomechanical studies have focused on potential changes in manipulative abilities during human hand evolution, but few have focused on functional signals for arboreal locomotion. Here, we provide this comparative context though the first analysis of hand loading in captive bonobos during ...
The effect of different grasping types on strain distributions in the trapezium of bonobos (Pan paniscus) KU Leuven
The thumb has played a key role in primate evolution due to its involvement in grasping and manipulation. A large component of this wide functionality is by virtue of the uniquely shaped trapeziometacarpal (TMC) joint. This TMC joint allows for a broad range of functional positions, but how its bone structure is adapted to withstand such a large variety of loading regimes is poorly understood. Here, we outline a novel, integrated finite element ...
Time‑lag of urinary and salivary cortisol response after a psychological stressor in bonobos (Pan paniscus) Koninklijke Maatschappij voor Dierkunde van Antwerpen
Time-lag of urinary and salivary cortisol response after a psychological stressor in bonobos (Pan paniscus) Universiteit Antwerpen
Cortisol is often measured as a marker for stress. Therefore, a profound validation of the time-lag between the stressor and the increase and peak in cortisol levels is needed. No study measured both the urinary and salivary cortisol time-lag after a psychological stressor. In this study, we used a frequent sampling study design to (1) describe the urinary and salivary cortisol pattern during a control day; and (2) characterize the induced ...
A Case Study of Conflict Management in Bonobos: How Does a Bonobo (Pan paniscus) Mother Manage Conflicts between Her Sons and Her Female Coalition Partner? Koninklijke Maatschappij voor Dierkunde van Antwerpen
Female coalitions are an important part of the social organization of bonobos. The strength of the mother-son relationship is another essential part of this social structure. A bonobo mother is therefore facing a dilemma when a conflict arises between her sons and her female coalition partners. Will she take her coalition partner’s side and favour the social organization of the group or support her son in order to defend her offspring? In order ...
The effect of inbreeding on infant mortality in captive bonobos (Pan paniscus), determined from DNA analysis of hair samples Koninklijke Maatschappij voor Dierkunde van Antwerpen
Vertical jumping performance of bonobo (Pan paniscus) suggests superior muscle properties Koninklijke Maatschappij voor Dierkunde van Antwerpen
Vertical jumping was used to assess muscle mechanical output in bonobos and comparisons were drawn to human jumping. Jump height, defined as the vertical displacement of the body centre of mass during the airborne phase, was determined for three bonobos of varying age and sex. All bonobos reached jump heights above 0.7 m, which greatly exceeds typical human maximal performance (0.3–0.4 m). Jumps by one male bonobo (34 kg) and one human male ...
Dynamic plantar pressure distribution during terrestrial locomotion of bonobos (Pan paniscus) Koninklijke Maatschappij voor Dierkunde van Antwerpen
We collected high-resolution plantar pressure distributions of seven bonobos during terrestrial bipedal and quadrupedal locomotion (N = 146). Functional foot length, degree of hallux abduction, and total contact time were determined, and plots, showing pressure as a function of time for six different foot regions, were generated. We also studied five adult humans for comparison (N = 13). Both locomotion types of the bonobo show a large variation ...