Dokumente Fakultät für Biologie und Psychologie (inkl. GAUSS) nach Gutachter "Fischer, Julia Prof. Dr."
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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 ... -
Bryophyte and macrolichen diversity of the Purdiaea nutans forest in southern Ecuador and its relationship to soil, climate and vegetation structure
(2008-10-02)This study confirms that the unique Purdiaea nutans forest in the upper montane belt of the Reserva Biologíca San Francisco in southern Ecuador is an azonal ridge vegetation type. Our ... -
Certain behaviors: Response selection and certainty-related processing in humans and rhesus monkeys
(2016-08-19)Humans and other animals constantly evaluate their decisions in order to learn and behave adaptively. Experimentally, such evaluation processes are accessed using metacognitive reports. When made after decisions, metacognitive ... -
Cognitive influences on sensory processing of visual motion
(2006-08-17)The current work represents a compilation of three scientific articles and two manuscripts that have been prepared for submission, all of them addressing the same central question: How do ... -
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 ... -
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. ... -
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 ... -
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 ... -
Effects of Selective Attention on Sensory Processing of Visual Motion
(2006-12-11)The topic of this thesis is centered on the question of how cognition influences the processing of sensory information. The main part of this work consists of seven research articles and ... -
Feeding competition in wild female Assamese macaques (Macaca assamensis)
(2014-09-30)Food is one of the most important resources animals compete over and assessing the way individuals compete over such limiting resources is fundamental to our understanding of the adaptations of living organisms. In mammals, ... -
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, ... -
Group coordination during collective movements in Guinea baboons (Papio papio)
(2019-11-08)Despite potentially diverging interests, members of social groups coordinate to maintain group cohesion. The mechanisms and processes of group coordination are modulated by species- and context-specific factors. The genus ... -
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 ... -
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 ... -
Kinship and sociality in wild Assamese macaques (Macaca assamensis): are they related?
(2020-12-04)Social bonds are found in social species spanning the entire mammalian kingdom. The formation of such bonds can be adaptive: strong links have been established between social integration and increased survival and/or ... -
Kommunikation in Echtzeit - die Einflüsse von kindgerichteter Sprache und kindlicher Aufmerksamkeit auf den Spracherwerb
(2021-09-23)In order to segment, understand and ultimately produce words from the flow of language, a series of learning processes are required. These processes are promoted by various extrinsic factors and intrinsic biases. This ... -
Leaving a solitary life behind: Evolutionary processes leading to sociality in animals
(2020-02-25)The evolution of stable animal groups is a major transition in evolution entailing changes in population structure and emerging properties due to the selective pressures associated with social interactions. Sociality is ... -
Male migration and alpha male takeovers in crested macaques, Macaca nigra
(2015-05-26)In gregarious living mammals, males are often forced to leave their natal group as a consequence of selective pressures from within group competition and inbreeding avoidance. A successful natal dispersal increases a male´s ... -
Male social relationships among wild Assamese macaques (Macaca assamensis)
(2016-11-08)General socioecological theories predict that in multi-male multi-female mammalian groups, males and females compete over resources of different nature. While females mainly compete over generally sharable food, males ... -
Mating systems and infant care of cooperatively breeding black-fronted tamarins (Leontocebus nigrifrons)
(2020-04-21)In animal societies, individual fitness partly depends on a decision on whether or not to provide parental care, and the number of mating partners. The later defines a social mating system, whereas consequences of copulations, ...