Browsing Fakultät für Biologie und Psychologie (inkl. GAUSS) by Advisor "Kappeler, Peter M. Prof. Dr."
Now showing items 1-20 of 27
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Causes and consequences of female competition in redfronted lemurs (Eulemur rufifrons)
(2024-04-19)Competition among female mammals appears to be much more widespread than previously thought, and it can take on extreme forms, including eviction and even death. Nevertheless, female competition has only recently been ... -
Environmental and maternal effects on infant development in wild Verreaux´s sifakas (Propithecus verreauxi)
(2021-12-23)Organisms’ life cycles vary tremendously between and within species leading to differences in life histories. Early development plays an important role in the life trajectory of an individual and shapes its entire life. ... -
Measuring communicative complexity across modalities: a new framework in the context of the “social complexity hypothesis” and its application in true lemurs
(2021-03-25)Animals exhibit an astonishing diversity of communicative systems, with substantial variation in both the nature and the number of signals they produce. Variation in communicative complexity has been conceptually and ... -
Cognition in narrow-striped mongooses, Mungotictis decemlineata, a Malagasy carnivore species
(2021-02-11)Carnivores include a wide variety of species that differ in social organization and brain-size, but these two characteristics do not seem to be linked to each other. Additionally, previous studies found no evidence of ... -
A short story: senescence in an annual reptile, Labord’s chameleon (Furcifer labordi)
(2020-12-10)Among animals, the fast-slow continuum is the dominant axis that shapes life-history variation. As resources are limited a trade-off occurs between a short lifespan, young age at maturity, high reproductive rates and high ... -
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 ... -
Roots of Primate Cognition. The Primate Cognition Test Battery applied to three species of lemurs (Varecia variegata, Lemur catta and Microcebus murinus).
(2018-05-16)Compared to other mammals, primates have evolved relatively large brains and outstanding cognitive skills. Given that brain tissue is energetically very costly, one major evolutionary question concerns possible selection ... -
Conservation physiology of two closely related, sympatric lemur species, the fat-tailed dwarf lemur (Cheirogaleus medius), and the gray mouse lemur (Microcebus murinus)
(2017-10-30)The detrimental effects of human-induced habitat loss and degradation on wildlife are pervasive and represent a primary concern for conservation biologists. Understanding how organisms accurately recognise and respond to ... -
The role of acoustic and visual signals in species recognition in true lemurs (Eulemur: Primates)
(2017-01-18)Signals represent important tools for animal social behavior. Numerous animal species use signals for communication as they serve as information transmitted from one individual to another. Signals also play essential roles ... -
Evolutionary mechanisms shaping MHC variation in sympatric lemurs
(2016-11-15)The major histocompatibility complex (MHC) is a multigene cluster characterized by remarkable polymorphism and a complex evolutionary history. The MHC genes assume a central role in the adaptive immune response of vertebrates ... -
Social organisation of the narrow-striped mongoose (Mungotictis decemlineata) in Kirindy Forest C.N.F.E.R.E.F., Madagascar
(2016-02-16)The diversity of ecological and behavioural adaptations of the Carnivora makes them an exemplary group for studying patterns of mammalian social evolution. In particular, species displaying sex-specific forms of social ... -
Sex-specific aging: Sex differences in survival and health in a wild primate population
(2015-01-15)Ageing influences the functioning of most living organisms in myriad ways and has profound consequences for their reproductive fitness and survival. Age-related changes in the functioning of an organism are thought to ... -
Behavioral and Feeding Ecology of a Small-bodied Folivorous Primate (Lepilemur leucopus)
(2015-01-13)Small-bodied folivorous primates are rare because processing leaves often requires extensive gut adaptations and lengthy retention times for fiber fermentation. However, Lepilemur leucopus (white-footed sportive lemur) ... -
Influence of social tolerance on social learning
(2014-11-10)One outstanding feature of modern human societies is the complex cultural behaviour they exhibit. Although we do not find comparable capacities for culture in other species, some elements of culture are present in the ... -
The social system of white-breasted mesites (Mesitornis variegata)
(2014-01-16)Animals show great diversity in their social systems, ranging from species living solitarily to species living in highly complex social groups. This variation in social systems provides the perfect setting to investigate ... -
Das Leben in der napoleonischen Armee - interdisziplinäre Untersuchung eines Massengrabs aus Kassel, Hessen
(2013-10-25)In 2008, a mass grave was found on the grounds of the University of Kassel, Germany. There was no evidence helping to identify them or throwing light on the cause of their death. Mainly due to 14C age determination and ... -
Biodiversity of true lemurs (Eulemur spp.): - Species delimitation and phylogeography in the brown lemur complex
(2013-09-26)Species are the fundamental units of comparison in all subfields of biology. Moreover, species are the currency of biological classification and used to define areas of conservation priority. Hence, central questions of ... -
Sex-specific differences in dispersal propensities and their consequences for grey mouse lemurs (Microcebus murinus)
(2012-10-22)Dispersal, the permanent relocation or change of social group of an organism, is an almost ubiquitous phenomenon among taxa. Sex-biased dispersal (SBD) propensities and/or distances are of one of the most common general ... -
Social organisation and mating system of the fosa (Cryptoprocta ferox)
(2012-09-24)Mammalian mating systems are closely related to the social organisation of a species, which in turn is determined by sex-specific selection pressures with respect to access to limited resources. In previous studies of ... -
Determinants and outcomes of group coordination and decision-making in red-fronted lemurs (Eulemur rufifrons)
(2011-10-07)In order to reap the benefits of group-living, gregarious animals have to maintain group cohesion. However, differences among group members in terms of sex, age or physiological constitution ...