Browsing Fakultät für Biologie und Psychologie (inkl. GAUSS) by Advisor "Fischer, Julia Prof. Dr."
Now showing items 1-20 of 20
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Determinants of vocal usage in the genus Chlorocebus
(2023-08-04)The vocal communication of non-human primates has been the center of extensive research efforts that aimed to advance our understanding of the evolution of vocal communication and human speech. The alarm call system of the ... -
Social information sampling and decision-making: An evolutionary and ontogenetic perspective
(2023-05-16)An advantage of being a group-living-, as opposed to a solitary-species, is having the opportunity to engage with conspecifics in mutually beneficial cooperative activities. Choice of cooperation partner often decides ... -
Regulation of inter-sexual relationships within the microcosm of Guinea baboon units
(2023-03-03)Male reproductive success is linked in most animals to their access to fertile females. Resulting competition among males presents a strong selective pressure on male reproductive strategies. In species with female choice ... -
Mother-infant relationships in wild Guinea baboons (Papio papio)
(2023-02-16)During infancy, primates are heavily dependent on their mothers for nursing, transport, and thermoregulation, but also benefit from associating with their mothers for protection and social support. Furthermore, the mother ... -
Determinants of cognitive performance and social preferences across age in Barbary macaques (Macaca sylvanus)
(2021-02-11)Aging is a universal process that occurs in almost all organisms and is defined as a progressive decrease in physiological functioning. For centuries, researchers have been interested in aging processes and their consequences. ... -
Dynamics and fitness benefits of male-male sociality in wild Guinea baboons (Papio papio)
(2020-03-06)Males living in multi-male groups display a wide range of relationships with co-resident males, varying from high levels of competition, intolerance and avoidance to cooperation, affiliation and social bonds. Despite the ... -
Statistical reasoning in nonhuman primates and human children
(2019-10-17)Decision makers are often faced with different options and must make decisions without having perfect knowledge about the outcomes. They have only samples of data at hand, extracted from past and present states of their ... -
Grunt usage and social monitoring: Investigation of the signaller and the receiver perspectives in a tolerant species of baboons
(2019-07-11)Understanding society, communication and cognition in non-human primates sheds light on the evolution of our own species. While the acoustic structure in primates is mainly innate, their vocal usage and comprehension/response ... -
Aging and its impact on sociality in Barbary macaques (Macaca sylvanus)
(2018-04-13)With the aging of the human population, studies on the causes and consequences and, particularly, age-associated diseases, are attracting substantial attention. But how does aging affect peoples’ motivation to engage with ... -
Social relationships of female Guinea baboons (Papio papio) in Senegal
(2017-08-02)Biologists and psychologists have held a long-term fascination for understanding sex-specific life history behaviours. Selection pressures occur via three main evolutionary mechanisms which may influence males and females ... -
Vocal repertoires of two matrilineal social whale species Long-finned Pilot whales (Globicephala melas) & Killer whales (Orcinus orca) in northern Norway
(2017-05-10)The aim of this study was to describe and investigate the vocal repertoire and possible factors influencing the size and composition of two matrilineal social whale species: long-finned pilot whales and killer whales in ... -
The impact of vocal expressions on the understanding of affective states in others
(2015-03-17)Understanding emotions of social partners is of fundamental importance in day-to-day life. Humans share their affective states and intentions not only by language, but also by facial expressions, body posture or tone of ... -
Foundations of variation in male aggressiveness and tolerance between chacma baboons (Papio ursinus) in Botswana and Guinea baboons (P. papio) in Senegal
(2014-10-24)The fitness limiting resource for most male primates is the indivisible fertilization of females. Therefore, males commonly compete aggressively with each other over access to receptive females. Among species, however, ... -
Costs of mate-guarding in wild male long-tailed macaques (Macaca fascicularis)
(2014-01-17)In promiscuous mating systems, several males compete with each other for access to fertile females, and males have evolved a variety of mating tactics to outcompete their rivals. Mate-guarding is a mating tactic used by ... -
Social tolerance: novel insights from wild female crested macaques, Macaca nigra
(2013-09-24)Sociality is ultimately beneficial for individuals. Social relationships amongst individuals are viewed as long-term investments, influencing individual fitness. Analyses of the costs (competition) and benefits (cooperation) ... -
Vocal Communication within the Genus Chlorocebus: Insights into Mechanisms of Call Production and Call Perception
(2013-09-11)It is difficult to overestimate the influence of language in day to day life, and language is often proposed as the clearest feature to distinguish us, Homo sapiens, from all other animals. The origin of language has long ... -
Vocal communication in a tolerant multi-level society: insights from signallers and receivers in Guinea baboons
(2013-07-03)When studying the evolution of animal communication it is important to consider both, the signaller (i.e. signal structure and signal usage) and the receiver (i.e. signal response). While in primates the structure of sounds ... -
Theory of Mind and Emotion Recognition
(2013-05-28)Perceiving and understanding social stimuli, including facial expressions, body language and vocalizations, is essential to human interactions. The ability to correctly identify internal states of others through such ... -
Social and Physical Cognition in Old World Monkeys - A Comparative Perspective
(2012-08-01)Primates have brains that are approximately twice as large as those of other similarly-sized mammals. Furthermore, also within the primate order brains have not only become increasingly large, but have also revealed ... -
Influences of ecological factors on vocal communication in olive baboons (Papio hamadryas anubis)
(2008-11-06)In non-human primates, flexibility is largely documented in usage of vocal signals, while it appears more limited in vocal production. The present thesis adopts two perspectives to investigate the degree of flexibility in ...