... of iguanas. Glucocorticoid Cyclura Iguana Glucose tolerance test Sugar Tourism National Science Foundation http://dx.doi.org/10.13039/100000001 IOS-1752908 Utah State University http://dx.doi.org/10.13039/100006630 A35851 Utah Agricultural Experiment...

... regulation plays an important role in both circulating levels of glucocorticoids and target tissue exposure. Three key enzyme pathways are responsible for the immediate control of glucocorticoids. De novo synthesis of glucocorticoid from cholesterol involves a multistep enzymatic cascade. This cascade...

...Jonathan Tea; Sarah L. Alderman; Kathleen M. Gilmour ABSTRACT Many animals, including zebrafish ( Danio rerio ), form social hierarchies through competition for limited resources. Socially subordinate fish may experience chronic stress, leading to prolonged elevation of the glucocorticoid stress...

... glucocorticoids, oxidative stress, immune function or body condition represent a cost of performing offspring care and shape subsequent fitness. We use a 4 year dataset collected in free-living cooperatively breeding superb starlings ( Lamprotornis superbus ), a species in which parental and alloparental care...

... Urban ecology ALAN Hormones Metabolism Stress Sleep Glucocorticoid Thyroid Melatonin Organisms have evolved under a natural dark and light cycle for millions of years, so their ability to survive and reproduce depends on not only occupying a favorable spatial niche but also an optimal...

...Blanca Jimeno; Michaela Hau; Simon Verhulst ABSTRACT Glucocorticoid hormones (GCs) are often assumed to be indicators of stress. At the same time, one of their fundamental roles is to facilitate metabolic processes to accommodate changes in energetic demands. Although the metabolic function of GCs...

...Jessica R. Thomas; Andrew J. Magyan; Peter E. Freeman; Sarah K. Woodley ABSTRACT In vertebrates, many responses to stress as well as homeostatic maintenance of basal metabolism are regulated by plasma glucocorticoid hormones (GCs). Despite having crucial functions, levels of GCs are typically...

... similarly, (2) stress-induced effects do not change over the course of the stress response and (3) glucocorticoids are the primary regulators of stress-induced changes of immune activity. We tested the first two assumptions by measuring three components of innate immunity at two times during the stress...

... opportunity to explore the roles of energetic state (as affected by food deprivation) and activation of the glucocorticoid stress response in determining life-history strategy and survival of a migratory species. Using an experimental approach, the relative influences of short-term food deprivation...

...Catherine A. Dayger; Deborah I. Lutterschmidt ABSTRACT As in many vertebrates, hormonal responses to stress vary seasonally in red-sided garter snakes ( Thamnophis sirtalis parietalis ). For example, males generally exhibit reduced glucocorticoid responses to a standard stressor during the spring...

... for correspondence ( [email protected] ) 2 7 2012 11 9 2012 © 2013. 2013 corticosteroid-binding globulin transcortin glucocorticoid brain glial cell Most systemic glucocorticoids (GCs) are bound to corticosteroid-binding globulin (CBG), also referred to as transcortin...

... japonica ) as our model, we elevated levels of the glucocorticoid stress hormone corticosterone in ovo and/or in the endogenous circulation of hatchlings. We examined the effects of treatments on corticosterone and glucose stress responses at two different ages, in juvenile and adult quail. In juveniles...

... capacity basal metabolic rate bird glucocorticoid metabolic scope peak metabolic rate plasticity songbird standard metabolic rate corticosterone Variation in the prenatal and postnatal environments can lead to long-term variation in adult phenotype, a process often referred...

... of the hypothalamo-pituitary-adrenal (HPA) axis in an attempt to elucidate the role of glucocorticoids in the modulation of the febrile response during the tolerant period. When our ducks became tolerant to LPS, they had significantly higher basal levels of plasma corticosterone (CORT, the principal glucocorticoid...

... for correspondence at present address: Max Planck Institute for Ornithology, Vogelwarte Radolfzell, Schlossallee 2, 78315 Radolfzell, Germany(e-mail: [email protected] ) 8 10 2007 © The Company of Biologists Limited 2007 2007 corticosterone glucocorticoid zebra finch selection experiment...

...-mail: [email protected] ) 23 10 2006 © The Company of Biologists Limited 2006 2006 bird body reserve fasting glucocorticoid immunosuppression Life-history theory assumes that a major trade-off occurs between reproduction and survival, so that the costs associated...