Considerable evidence suggests that the steroid hormone testosterone mediates major life-
history trade-offs in vertebrates, promoting mating effort at the expense of parenting effort or …

Rapid testosterone fluctuations in response to social stimuli are observed across a wide
range of species, and the highly conserved nature of these fluctuations suggests an …

Evolutionary medicine–ie the application of insights from evolution and ecology–has
tremendous untapped potential to spark transformational innovation in biomedicine and …

Hormonal signaling provides metazoans with the ability to regulate development, growth,
metabolism, immune defense, and reproduction in response to internal and external stimuli …

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 …

The present review discusses the communication between the hypothalamic-pituitary-gonad
(HPG) axis and the immune system of vertebrates, attempting to situate the HPG-immune …

Abstract The Challenge Hypothesis (Wingfield et al., 1990) originally focused on adult male
avian testosterone elevated in response to same-sex competition in reproductive contexts …

Abstract DHEA and DHEA-S have numerous associations with multiple aspects of immune
function and are often characterized as beneficial and supportive of immunocompetence …

Respiratory illnesses have caused significant mortality in African great ape populations.
While much effort has been given to identifying the responsible pathogens, little is known …

While males are generally the low investing sex when it comes to offspring care, males of
many species experience intense and persistent mating effort. Mating effort incurs a variety …