Annual profile of fecal androgen and glucocorticoid levels in free-living male American kestrels from southern mid-latitude areas.
Ricardo José Garcia Pereira,Marco Antonio Monteiro Granzinolli,José Maurício Barbanti Duarte +2 more
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The findings suggest that male American kestrels living in southeast Brazil exhibit significant seasonal changes in fecal androgen and glucocorticoid concentrations, which seem to be stimulated by decreasing daylength but not by rainfall or temperature.About:
This article is published in General and Comparative Endocrinology.The article was published on 2010-03-01 and is currently open access. It has received 13 citations till now.read more
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The role of glucocorticoids in the vertebrate response to weather
TL;DR: The hypothesis that glucocorticoids can serve as the physiological mechanism promoting fitness during inclement weather is supported, with a strong bias towards studies in domesticated laboratory species and wild animals held in captivity, indicating a need for field studies.
Journal ArticleDOI
Program animal welfare: Using behavioral and physiological measures to assess the well-being of animals used for education programs in zoos
Bonnie A. Baird,Bonnie A. Baird,Christopher W. Kuhar,Christopher W. Kuhar,Kristen E. Lukas,Kristen E. Lukas,Laura Amendolagine,Grace Fuller,Grace Fuller,James Nemet,Mark A. Willis,Mandi W. Schook,Mandi W. Schook +12 more
TL;DR: In this article, the authors investigated program animal welfare using both behavioral and physiological measures in two separate experiments and found no effect of handling specifically for education programs on measures of welfare in Experiment Two ( p > 0.05 in all FGM and undesirable behavior models).
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Validation of a fecal glucocorticoid assay to assess adrenocortical activity in meerkats using physiological and biological stimuli
Ines Braga Goncalves,Michael Heistermann,Peter Santema,Ben Dantzer,Jelena Mausbach,Andre Ganswindt,Marta B. Manser +6 more
TL;DR: This study validated a fecal glucocorticoid assay for assessing adrenocortical activity in meerkats by comparing the suitability of three GC enzyme immunoassays, and showed that the group specific 11β-hydroxyetiocholanolone assay was most sensitive to FGCM alterations, detecting significant and most distinctive elevations in F GCM levels around 25 h after ACTH administration.
Journal ArticleDOI
Benefits of extra food to reproduction depend on maternal condition
Stefano Podofillini,Jacopo G. Cecere,Matteo Griggio,Margherita Corti,Enrico L. De Capua,Marco Parolini,Nicola Saino,Lorenzo Serra,Diego Rubolini +8 more
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Validation of a fecal glucocorticoid metabolite assay to assess stress in the budgerigar (Melopsittacus undulatus).
Anna M. Young,Dennis M. Hallford +1 more
TL;DR: This work has developed a double antibody radioimmunoassay protocol based on a commercially available (125) I-corticosterone radioimuneassay kit for use in detecting fecal glucocorticoid metabolites in small quantities of budgerigar droppings, and validation has demonstrated the assay is both sensitive and a reliable approach to noninvasive monitoring of stress in budgerIGars.
References
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Observational study of behavior: sampling methods.
TL;DR: Seven major types of sampling for observational studies of social behavior have been found in the literature and the major strengths and weaknesses of each method are pointed out.
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How do glucocorticoids influence stress responses? Integrating permissive, suppressive, stimulatory, and preparative actions.
TL;DR: This review considers recent findings regarding GC action and generates criteria for determining whether a particular GC action permits, stimulates, or suppresses an ongoing stress-response or, as an additional category, is preparative for a subsequent stressor.
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Handbook of the Birds of the World
TL;DR: Family Thraupidae (Tanagers), Family Cardinalidae (Cardinals), Family Emberizidae (Buntings and New World Sparrows), Family Icteridae (New World Blackbirds).
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The "Challenge Hypothesis": Theoretical Implications for Patterns of Testosterone Secretion, Mating Systems, and Breeding Strategies
TL;DR: This model indicates that there may be widely different hormonal responses to male-male and male-female interactions and presumably equally plastic neural mechanisms for the transduction of these signals into endocrine secretions.
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Seasonal changes in plasma glucocorticoid concentrations in free-living vertebrates.
TL;DR: This review examines the growing evidence that GC concentrations in free-living reptiles, amphibians, and birds, but not mammals, are commonly elevated during the breeding season and test three hypotheses with different focuses on GC's energetic or behavioral effects, as well as onGC's role in preparing the animal for subsequent stressors.