Daan Laméris

Daan Laméris
University of Antwerp | UA · Department of Biology

MSc Behavioural Ecology

About

15
Publications
1,674
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86
Citations
Citations since 2017
15 Research Items
86 Citations
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Introduction
I am a behavioural biologist currently studying the cognitive aspects of affective states in bonobos for my PhD at the University of Antwerp and the Antwerp Zoo Centre for research and Conservation
Skills and Expertise

Publications

Publications (15)
Article
Full-text available
Primates show various forms of behavioral contagion that are stronger between kin and friends. As a result, behavioral contagion is thought to promote group coordination, social cohesion, and possibly state matching. Aside from contagious yawning, little is known about the contagious effect of other behaviors. Scratching is commonly observed during...
Article
Abnormal behaviours are often used as a welfare indicator in zoo-housed great apes. While previous studies report on the occurrence of abnormal behaviours in zoo-housed chimpanzees (Pan troglodytes), there is currently a lack of knowledge about such behaviours in the closely related bonobo (Pan paniscus). Here we report on the prevalence, diversity...
Article
The emotional Stroop task is a paradigm commonly applied in human studies to investigate how emotionally laden stimuli interfere with cognitive processes. Recent modifications of this task have enabled researchers to study similar Stroop effects in zoo-housed primates. Across three experiments using a pictorial emotional Stroop task, we investigate...
Article
Full-text available
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...
Article
Full-text available
Unlabelled: Attention may be swiftly and automatically tuned to emotional expressions in social primates, as has been demonstrated in humans, bonobos, and macaques, and with mixed evidence in chimpanzees, where rapid detection of emotional expressions is thought to aid in navigating their social environment. Compared to the other great apes, orang...
Article
Previous studies on prosociality in bonobos have reported contrasting results, which might partly be explained by differences in experimental contexts. In this study, we implement a free choice group experiment in which bonobos can provide fruit juice to their group members at a low cost for themselves. Four out of five bonobos passed a training ph...
Article
Full-text available
Previous studies reported contrasting conclusions concerning bonobo prosociality, which are likely due to differences in the experimental design, the social dynamics among subjects and characteristics of the subjects themselves. Two hypotheses have been proposed to explain the occurrence of prosociality in animals: the cooperative breeding hypothes...
Article
Full-text available
Infectious diseases can be considered a threat to animal welfare and are commonly spread through both direct and indirect social interactions with conspecifics. This is especially true for species with complex social lives, like primates. While several studies have investigated the impact of sociality on disease risk in primates, only a handful hav...
Article
Full-text available
Decisions on environmental enrichment programmes are sometimes based on the assumption that non-natural or artificial looking items negatively affect visitor experiences. In this study, we developed a questionnaire to assess zoo visitor attitudes towards enrichment appearance in an outdoor walk-through enclosure for ring-tailed lemurs (Lemur catta)...
Article
Full-text available
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...
Article
Full-text available
Environmental enrichment is widely used to improve the quality of life of animals under human care. To successfully implement enrichment programs, it is important to evaluate their effect in different enclosure types since housing conditions may change depending on external factors, such as husbandry, management, or seasonal variation. This study i...
Article
Hunting may be the greatest threat to wildlife populations across the Congo basin. Largebodied species are the most vulnerable; alterations in assemblages of such keystone species can affect many important ecological functions. There may be a reduction or loss of ecological services, such as seed dispersal. Monitoring functional diversity within a...
Article
Full-text available
Hunting may be the greatest threat to wildlife populations across the Congo basin. Largebodied species are the most vulnerable; alterations in assemblages of such keystone species can affect many important ecological functions. There may be a reduction or loss of ecological services, such as seed dispersal. Monitoring functional diversity within a...
Article
As well as leading to a loss of biodiversity (i.e. species richness and abundance), human activities also affect ecosystem functioning. Documenting how the suite of ecological roles changes following disturbance provides a complementary source of information for conservation management. To this end, we measured mammal diversity in terms of communit...

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