Glucocorticoids are hormones that mediate the energetic demands that accompany
environmental challenges. It is therefore not surprising that these metabolic hormones have …

Abstract Changes in the environment related to inclement weather can threaten survival and
reproductive success both through direct adverse exposure and indirectly by decreasing …

Relatives have more similar gut microbiomes than nonrelatives, but the degree to which this
similarity results from shared genotypes versus shared environments has been …

In social hierarchies, dominant individuals experience reproductive and health benefits, but
the costs of social dominance remain a topic of debate. Prevailing hypotheses predict that …

Genetic admixture is central to primate evolution. We combined 50 years of field
observations of immigration and group demography with genomic data from~ 9 generations …

Group size is an important trait of social animals, affecting how individuals allocate time and
use space, and influencing both an individual's fitness and the collective, cooperative …

Are differences in hypothalamic-pituitary-adrenal (HPA) axis activation across the adult life
span linked to differences in survival? This question has been the subject of considerable …

Social status can have striking effects on health in humans and other animals, but the
causes often are unknown. In male vertebrates, status-related differences in health may be …

Abstract In 1963, Jeanne and Stuart Altmann traveled through Kenya and Tanzania
searching for a baboon study site. They settled on the Maasai-Amboseli Game Reserve …

Energy is a variable of key importance to a wide range of research in primate behavioral
ecology, life history, and conservation. However, obtaining detailed data on variation in …