32 Result(s)
within
Julia Ostner
English
-
Article
Open AccessThe long-term gut bacterial signature of a wild primate is associated with a timing effect of pre- and postnatal maternal glucocorticoid levels
During development, elevated levels of maternal glucocorticoids (GCs) can have detrimental effects on offspring morphology, cognition, and behavior as well as physiology and metabolism. Depending on the timing...
-
Article
Open AccessGrowth trajectories of wild Assamese macaques (Macaca assamensis) determined from parallel laser photogrammetry
Socioecological factors are associated with life-history patterns and growth trajectories among primates. Under certain conditions, selection may favor a temporal decoupling of growth and major life-history ev...
-
Article
Open AccessAging gut microbiota of wild macaques are equally diverse, less stable, but progressively personalized
Pronounced heterogeneity of age trajectories has been identified as a hallmark of the gut microbiota in humans and has been explained by marked changes in lifestyle and health condition. Comparatively, age-rel...
-
Article
Open AccessQuantifying within-group variation in sociality—covariation among metrics and patterns across primate groups and species
It has long been recognized that the patterning of social interactions within a group can give rise to a social structure that holds very different places for different individuals. Such within-group variation...
-
Article
Validation of a Fecal T3 Metabolite Assay for Measuring Energetics in Wild Golden Snub-Nosed Monkeys (Rhinopithecus roxellana)
-
Article
Open AccessThe effect of reproductive state on activity budget, feeding behavior, and urinary C-peptide levels in wild female Assamese macaques
The source of maternal energy supporting reproduction (i.e., stored or incoming) is an important factor determining different breeding strategies (capital, income or mixed) in female mammals. Key periods of en...
-
Article
Open AccessSelective attention for affiliative and agonistic interactions of dominants and close affiliates in macaques
Monitoring conspecifics is a crucial process in social learning and a building block of social cognition. Selective attention to social stimuli results from interactions of subject and stimulus characteristics...
-
Article
Prenatal maternal stress effects on the development of primate social behavior
Prenatal developmental plasticity in response to various environmental and social adversities can affect multiple aspects of offspring phenotype including social behavior strategies with effects that can last ...
-
Article
The Effect of Dominance Rank on the Distribution of Different Types of Male–Infant–Male Interactions in Barbary Macaques (Macaca sylvanus)
In several cercopithecine species males exhibit a specific type of male–infant–male interaction during which two males briefly manipulate an infant. These interactions typically occur after a male carrying an ...
-
Chapter
Primate Social Cognition: Evidence from Primate Field Studies
The social complexity hypothesis proposes that primates evolved large brains in order to master the challenges posed by a complex society. The more complex a social group, the more information an individual ne...
-
Article
Open AccessLow Levels of Fruit Nitrogen as Drivers for the Evolution of Madagascar’s Primate Communities
The uneven representation of frugivorous mammals and birds across tropical regions – high in the New World, low in Madagascar and intermediate in Africa and Asia – represents a long-standing enigma in ecology....
-
Article
A first report of non-invasive adenovirus detection in wild Assamese macaques in Thailand
Several simian adenoviruses (AdVs) have been detected and isolated in various species of non-human primates with the goals of monitoring the health of wildlife and investigating their potential for zoonotic di...
-
Article
Triadic awareness predicts partner choice in male–infant–male interactions in Barbary macaques
Social knowledge beyond one’s direct relationships is a key in successfully manoeuvring the social world. Individuals gather information on the quality of social relationships between their group companions, w...
-
Article
Open AccessAge, but not anthelmintic treatment, is associated with urinary neopterin levels in semi-free ranging Barbary macaques
Studying host parasite interactions and their implications for evolution and ecology recently received increasing attention, particularly with regard to host physiology and immunity. Here we assess variation o...
-
Article
Open AccessPatterns and Consequences of Male–Infant Relationships in Wild Assamese Macaques (Macaca assamensis)
Male care for offspring is unexpected in polygynandrous mammals. Evidence from nonhuman primates, however, indicates not only the existence of stable male–immature associations in multimale–multifemale groups,...
-
Article
Predictors of food-related aggression in wild Assamese macaques and the role of conflict avoidance
The quality, availability and distribution of food resources and their influence on types and levels of feeding competition play a central role in ecological models of female social structure in mammals. Here,...
-
Article
Mating Competition, Promiscuity, and Life History Traits as Predictors of Sexually Transmitted Disease Risk in Primates
Competition among males influences the distribution of copulations and should therefore influence the spread of sexually transmitted diseases (STDs). We developed a model to investigate STDs in the mating and ...
-
Article
Lack of Evidence for Energetic Costs of Mate-Guarding in Wild Male Assamese Macaques (Macaca assamensis)
Mate-guarding is a widespread and efficient male strategy for increasing paternity success. The inability to guard entire female receptive phases or complete lack of mate-guarding has been explained by energet...
-
Article
Dominance rank, female reproductive synchrony, and male reproductive skew in wild Assamese macaques
In groups with multiple males, direct mate competition may select for the evolution of dominance hierarchies that sort males into a queue for access to fertile females. The priority-of-access (PoA) model propo...
-
Article
Preliminary study of the genetic diversity of eastern Assamese macaques (Macaca assamensis assamensis) in Thailand based on mitochondrial DNA and microsatellite markers
Human overpopulation, deforestation, invasion of agricultural areas, and livestock are the primary causes for population fragmentation of wildlife. The distribution range of species of the genus Macaca is constan...
