Many aspects of the social environment affect hypothalamic‐pituitary‐adrenal (HPA) axis
function and increase circulating glucocorticoid concentrations. In this review, we examine …

Following Darwin's original insights regarding sexual selection, studies of intrasexual
competition have mainly focused on male competition for mates; by contrast, female …

Creating a healthy, social classroom environment. This book explains how the brain, as a
social organism, learns best throughout the lifespan, from our early schooling through late …

Sociality has evolved in many animal taxa, but primates are unusual because they establish
highly differentiated bonds with other group members. Such bonds are particularly …

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

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

Behavioral ecologists have devoted considerable effort to identifying the sources of variation
in individual reproductive success. Much of this work has focused on the characteristics of …

Variation in male mating success is often related to rank differences. Males who are unable
to monopolize oestrous females alone may engage in coalitions, thus enhancing their …

Multiple stressors affect developing and adult organisms, thereby partly structuring their
phenotypes. Determining how stressors influence health, well‐being, and longevity in …

The extent of (in) equality is highly diverse across species of social mammals, but we have a
poor understanding of the factors that produce or inhibit equitable social organizations …