Browsing Fakultät für Biologie und Psychologie (inkl. GAUSS) by Referee "Heymann, Eckhard W. Prof. Dr."
Now showing items 1-20 of 23
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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) ... -
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 ... -
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 ... -
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 ... -
Effects of anthropogenic pressure on large mammal species in the Hyrcanian forest, Iran
(2018-01-24)Anthropogenic activities, such as overexploitation (poaching, logging) and farming (livestock grazing), are the most serious threats to biodiversity and ecosystem services. The effects of these drivers may be synergistic ... -
Effects of forest fragmentation on brown spider monkeys (Ateles hybridus) and red howler monkeys (Alouatta seniculus)
(2013-09-13)The increasing intensity of anthropogenic land use and conversion has immense impacts on ecosystems worldwide and often results in habitat fragmentation. Fragmentation and other anthropogenic disturbances (e.g. hunting and ... -
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. ... -
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 ... -
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, ... -
Inequality in nature. Patterns of reproductive skew among male redfronted lemurs (Eulemur fulvus rufus)
(2009-01-22)Due to male-male competition over access to fertile females, small groups of female primates are predicted to contain only one adult male. The gregarious lemurs of Madagascar significantly ... -
Male Reproductive Strategies in Verreaux's Sifaka (Propithecus verreauxi)
(2009-04-28)The lemurs of Madagascar are the evolutionary endpoints of a spectacular primate adaptive radiation and provide a unique opportunity to study convergent evolution in social organization. ... -
Mitochondrial genomes and the complex evolutionary history of the cercopithecine tribe Papionini
(2015-08-18)The present study is meant to further illuminate the evolutionary history of the cercopithecine tribe Papionini. The Papionini, as sister lineage to the Cercopithecini, belong to the Cercopithecinae subfamily and comprise ... -
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 ... -
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 ... -
The Chemical Ecology of Primate Seed Dispersal
(2016-04-06)Many tropical angiosperms rely on frugivores for seed dispersal and evolved fleshy fruits to attract them. Although both sides of the interaction are generalists, frugivores do not feed on the full range of fruit species ... -
The Ecology of the Red Rainbowfish (Glossolepis incisus) and the Impact of Human Activities on Its Habitats in Lake Sentani, Papua
(2013-10-04)Summary Located in the western half of New Guinea, Papua is facing rapid and poorly-planned social and economic development, increasing habitat degradation and threatening its high level of species richness and endemicity. ... -
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 ... -
Untersuchung der Lebensraumansprüche des Grauspechts Picus canus und seiner Verbreitungsgrenze in Niedersachsen
(2018-06-11)The grey-headed woodpecker (Picus canus) is a semi-frequent species distributed worldwide from West France over Central Europe and East Russia up to Japan and Sumatra. The populated habitats vary and comprise boundary-abundant ... -
Variation in susceptibility to parasite infection: patterns, determinants and consequences in red-fronted lemurs
(2009-10-05)Parasites and infectious diseases represent an ecological force shaping animal social evolution. Particular attention has been paid to parasite infection as a driver of mate choice in models ...