Increasingly, levels of the 'stress hormones' cortisol and corticosterone are being used by
ecologists as indicators of physiological stress in wild vertebrates. The amplitude of …

Socially aggressive interaction is stressful. What is more, social aggression is stressful for
both dominant and subordinate animals. Much of the neurocircuitry for stress and …

Plasma levels of corticosterone are often used as a measure of “stress” in wild animal
populations. However, we lack conclusive evidence that different stress levels reflect …

Understanding the role of multiple colour signals during sexual signalling is a central theme
in animal communication. We quantified the role of multiple colour signals (including …

SYNOPSIS. An organism's phenotype results from an interaction of environment and
genotype. Sex steroids play a role in translating sexual genotype into phenotype. The focus …

We measured the behavioural and hormonal responses to capture stress in male red-sided
garter snakes. Four hours of capture stress resulted in no suppression of mating behaviour …

Animals often cope with adverse events by releasing glucocorticoid hormones, which in turn
promote increased energy assimilation. In captive animals, crowding also leads to increased …

We examined the relative influences of pre-fight housing condition, contest intensity, and
contest outcome in modulating post-fight stress hormone concentrations in territorial male …

It is an axiom of vertebrate behavioural endocrinology that full expression of a male
behavioural phenotype depends on testicular influences during development, in adulthood …

Serotonin is widely believed to exert inhibitory control over aggressive behavior and intent.
In addition, a number of studies of fish, reptiles, and mammals, including the lizard Anolis …