Stress responses play a key role in allowing animals to cope with change and challenge in
the face of both environmental certainty and uncertainty. Measurement of glucocorticoid …

A growing body of evidence from across taxa suggests that exposure to elevated levels of
glucocorticoids during early development can have long-term effects upon physiological and …

Background Maternal effects mediated by egg size and quality may profoundly affect
offspring development and performance, and mothers may adjust egg traits according to …

Social status can vary considerably among individuals and has significant implications for
performance. In addition to a genetic component, social status may be influenced by …

Large inter-species differences have been found in yolk corticosterone amounts in avian
eggs. While some studies have failed to detect significant amounts of corticosterone, in other …

An animal's emotional responses are the result of its cognitive appraisal of a situation. This
appraisal is notably influenced by the possibility of an individual to exert control over an …

Owl clutches typically hatch asynchronously, and brood size hierarchies develop. In this
study, we describe intra-clutch variation of testosterone, androstenedione, estradiol, and …