Animal biometrics is an emerging field that develops quantified approaches for representing
and detecting the phenotypic appearance of species, individuals, behaviors, and …

Research in the basic biology of ageing is increasingly identifying mechanisms and
modifiers of ageing in short-lived organisms such as worms and mice. The ultimate goal of …

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

Social relationships have profound effects on health in humans and other primates, but the
mechanisms that explain this relationship are not well understood. Using shotgun …

Aging, for virtually all life, is inescapable. However, within populations, biological aging rates
vary. Understanding sources of variation in this process is central to understanding the …

This comprehensive introductory text integrates evolutionary, ecological, and demographic
perspectives with new results from field studies and contemporary noninvasive molecular …

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 …

The rate of adaptive evolution, the contribution of selection to genetic changes that increase
mean fitness, is determined by the additive genetic variance in individual relative fitness. To …

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 …