Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"bonobos"”.
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Communication and Travel Coordination in Wild Bonobos
… communication and travel patterns of wild bonobos (Pan paniscus), a species of great ape with a highly fluid ‘fission-fusion’ social structure, in which individuals from a single social group regularly divide into smaller subgroups (‘parties’). In Chapters 1 and 2, we investigate the …
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Social Decision-Making in Bonobos and Chimpanzees
… in humans’ closest living relatives, bonobos and chimpanzees. In Chapter 1, I review existing literature on theory of mind—or the ability to understand others’ psychological states—in these species. I also present a theoretical framework to guide further investigation of social …
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Linking behaviour and physiology of female bonobos (Pan paniscus)
… and the importance of dominance in female bonobos. Detailed behavioural studies were carried out on four mixed-sex captive bonobo groups; morphological data and faecal samples were collected to allow non-invasive assessment of physiological parameters. First, I addressed the background for …
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Evidence of Language Prerequisites in Pan: Orofacial-Motor and Breath Control in Chimpanzees and Bonobos
… relatives: chimpanzees (Pan troglodytes) and bonobos (Pan paniscus). We hypothesized that OFM and BC would be present in both species of Pan and that bonobos would demonstrate increased OFM and BC due to their stronger reliance on vocal communication compared to chimpanzees. To test this …
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Differences in the Communicative Behavior and Neurobiology of Chimpanzees (Pan troglodytes) and Bonobos (Pan paniscus)
<p>Chimpanzees and bonobos have distinctly different vocalizations, but it is unclear why these differences have evolved. We hypothesized that differences in habitat and feeding ecology have selected for bonobos to have an increased reliance on vocal communication compared to chimpanzees. To …
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The Adaptive Value of Complex Socio-Communicative Behavior
… emergence are still uncertain. Unlike humans, bonobos and chimpanzees do not have language. However, bonobos may have been subjected to similar selection pressures as early hominins, subsequent to their phylogenetic split from chimpanzees roughly 1.5 million years ago. The current study …
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The Evolutionary Origins of Autism Associated Genes and Their Role in Great Ape Socio-Communicative Behavior
… 3 have been investigated in great apes such as bonobos, chimpanzees, and gorillas. Great apes are the closest relatives to humans on the phylogenetic tree. They are also one of the few animal groups that have complex social communication that share fundamental characteristics with human …
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An Empirical and Theoretical Comparison of the Socio-ecological Behaviors of Captive Chimpanzees (Pan troglodytes), Bonobos (Pan paniscus), and Western Lowland Gorillas (Gorilla gorilla): Social Tolerance and Behavioral Responses to Changes in Food Quality and Distribution
… most of their range in Central Africa, however, bonobos do not overlap with either of the other two species. This difference has been hypothesized to be the main factor leading to the socio-ecological traits of each species. Access to, and competition for, terrestrial herbaceous vegetation (THV) …
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Comparisons of the socio-behavioral differences between chimpanzees (Pan troglodytes) and bonobos (Pan paniscus), investigating the impact of a naturally occurring polymorphic microsatellite deletion in the 5’ flanking region of arginine vasopressin receptor 1a (AVPR1a) on gene expression and sociality within the Pan genus
… we collected identical behavioral data on bonobos, who are not polymorphic for the deletion of this microsatellite in order to make comparisons within the Pan genus on sociality and the impact of a polymorphic deletion of the DupB microsatellite. Finally we conduced luciferase reporter …
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Yakety sacs: laryngeal air sac usage in great apes
… digital audio/video recordings to determine when bonobos (<em>Pan paniscus</em>) inflate their laryngeal air sacs. We identified a region of interest in the air sac area and quantified it using frame-by frame image analysis. We then compared the difference in areas between resting, swallowing, and …
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Pictorial Primates: A Search for Iconic Abilities in Great Apes
… in picture-experienced and language-competent bonobos. Only the latter study yielded evidence for recognition. The failures in the former study are discussed in terms of experimental shortcomings, and suggestions for future improvements are made.
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Comparative population genetics of the Hominoidea: An investigation of locus-specific and genome-wide influences
… in the Hominoidea (humans, chimpanzees, bonobos, gorillas, and orangutans) in order to test the hypothesis that a high variance in male reproductive success, as predicted from behavioral data, may influence levels of hominoid genetic diversity. First, comparative chromosome and …
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What Makes Our Minds Human? Comparative Phylogenetic Perspectives on the Evolution of Cognition
… through comparative studies with chimpanzees and bonobos. The general aim of these studies is to understand which aspects of cognition are unique to humans, and which are shared with our closest living relatives. Chapters 2-3 test the hypothesis that humans have unique cognitive skills for …
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Reconstructing Soft Tissues of Plio-Pleistocene Hominids using Comparative Anatomy of Modern Humans & Great Apes
… thicknesses for Chimpanzees (Pan troglodytes), Bonobos (Pan paniscus), and by extension other Pliocene hominids, such as Australopithecus africanus, are presented. In addition, new methods for predicting nasal protrusions for all African great apes, modern humans, and by extension all ancestors …