... associated with attachment of weighted backpacks (based on plasma corticosterone measures). Our results suggest that the processes of energy balance and mass regulation involve a greater array of mechanisms than simply matching energy in through the amount of food consumed to energy out, dictated by activity...

... periods without permanent water access. Often this involves the ability to tolerate dehydration, which can have adverse physiological effects and is typically considered a physiological stressor. While having many functions, the hormone corticosterone (CORT) is often released in response to stressors, yet...

... and their underlying neuroendocrine mechanisms. To address this gap, we measured the corticosterone (CORT) and prolactin (PRL) stress response in individuals of both sexes of the biparental rock dove ( Columba livia ) that had never raised chicks versus birds that had fledged at least one chick. We measured both CORT...

... setting and measured the response of corticosterone and innate immune performance to dehydration with the aim of identifying any correlation or trade-offs between them. We measured corticosterone of cottonmouths at a baseline level and then again following a 60 min stress test when at three hydration...

... , A. S. , Marchetto , N. M. , Juliano , S. A. and Bowden , R. M. ( 2012 ). Embryonic exposure to corticosterone modifies the juvenile stress response, oxidative stress and telomere length . Proc. R. Soc B Biol. Sci. 279 , 1447 - 1456 . 10.1098/rspb.2011.1913 Hsu , B.-Y...

...Aymam C. de Figueiredo; Stefanny C. M. Titon; João C. Cyrino; Letícia A. K. Nogueira; Fernando R. Gomes ABSTRACT Mammals show immune up-regulation and increased plasma and local (gastrointestinal tract) concentrations of some immunoregulatory hormones, such as corticosterone and melatonin, after...

... both control and stressor-exposed conditions. Individuals significantly decreased their baseline corticosterone levels and increased their mass during treatment exposure. This response was consistent across environmental challenge types. There was high repeatability in the intercept and slope...

... migrants to declining food availability. (1) The prepare hypothesis predicts that facultative migrants prepare for departure by increasing fuel stores in response to declining food availability, and elevations of baseline corticosterone (CORT) facilitate increased activity. (2) The escape hypothesis...

..., such as corticosterone, affect an organism's ability to overcome such challenges. We hypothesized that changes in the glucocorticoid response curve contribute to the evolution of increased performance during challenging conditions, and tested it on bank voles ( Myodes glareolus ) from a multidirectional artificial...

... of the cardiovascular response upon repeated exposure to restraint stress in rats. The habituation of the corticosterone response to repeated restraint stress was also evaluated. For this, animals were subjected to either acute or 10 daily sessions of 60 min of restraint stress. CVS and social isolation protocols...

... with moderate gonadal and liver expression. Inhibition of glucocorticoid generation by metyrapone was found to decrease levels peripherally, while both peripheral and central administration of the 11β-HSD2 inhibitor DETC resulted in elevated concentrations of corticosterone. These data suggest that during...

... response and impact the immunity of the South American rattlesnake ( Crotalus durissus ) when compared with a fluctuating thermal regime. We addressed this question by determining heterophil:lymphocyte (H:L) ratio, plasma bacteria-killing ability (BKA) and corticosterone (CORT) levels in snakes kept under...

... to increase with baseline corticosterone level, and decreased with the post-exercise corticosterone level. Thus, increased baseline corticosterone level promotes high metabolic performance, but a high corticosterone response to swimming acts as an inhibitor rather than stimulator of intense activity. However...

.../ Summary: Early-life nutritional stress has immediate, but no lasting effects, on immune function or stress physiology and incites a compensatory growth response that has long-term effects on fitness and survival. Compensatory growth Corticosterone Fitness Life-history trade-offs...

... ( Sceloporus undulatus ) from populations that naturally differ in long-term exposure to invasive fire ants ( Solenopsis invicta ). We manipulated early-life stress in the resulting offspring via weekly exposure to fire ants, application of the stress-relevant hormone corticosterone or control treatment from 2...

... , S. ( 2017a ). Strong association between corticosterone levels and temperature-dependent metabolic rate in individual zebra finches . J. Exp. Biol.   220 , 4426 - 4431 . 10.1242/jeb.166124 Jimeno , B. , Briga , M. , Verhulst , S. and Hau , M. ( 2017b ). Effects...

... change. The emergence of non-invasive corticosterone (CORT) assays allows us to rapidly assess physiological responses to environmental change on a large scale. We lack, however, a basic understanding of how temperature affects CORT, and whether temperature and CORT interactively affect performance. Here...

... are virtually unknown. Bird eggs contain vitamin E, a major antioxidant, and also maternal corticosterone. The independent consequences of variation in the egg concentrations of these compounds for offspring phenotype are largely unknown and no study has investigated their combined effects. We manipulated...

... is thought to be ubiquitous across vertebrates, we are not aware of experiments which tested this directly, i.e. in which metabolic rate was manipulated and measured together with GCs. We therefore tested for a relationship between plasma corticosterone (CORT; ln transformed) and metabolic rate (MR; measured...

... and nutrient costs of glucocorticoid-accelerated development alter fitness trade-offs across life stages. Amphibian Life history Trade-off Glucocorticoids Corticosterone Stable isotopes Larval development is shaped by genetic and environmental interactions, and variation in conditions during...