Higher plasma corticosterone is associated with reduced costs of infection in red-winged blackbirds
| Autor: | Ignacio T. Moore, Frances Bonier, Laura A. Schoenle, Nicole M. Weinstein, Ivana Schoepf |
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| Rok vydání: | 2018 |
| Předmět: |
Male
0106 biological sciences 0301 basic medicine Erythrocytes Endogeny Breeding 010603 evolutionary biology 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Endocrinology Avian malaria Corticosterone Prevalence Agelaius medicine Animals Parasites Passeriformes biology Immune modulation biology.organism_classification medicine.disease Adaptation Physiological 030104 developmental biology chemistry Immunology Female Animal Science and Zoology Plasma corticosterone Seasons Malaria Glucocorticoid medicine.drug |
| Zdroj: | General and Comparative Endocrinology. 256:89-98 |
| ISSN: | 0016-6480 |
| DOI: | 10.1016/j.ygcen.2017.07.006 |
| Popis: | Glucocorticoid hormones allow individuals to rapidly adjust their physiology and behavior to meet the challenges of a variable environment. An individual's baseline concentration of glucocorticoids can reflect shifts in life history stage and resource demands while mediating a suite of physiological and behavioral changes that include immune modulation and resource allocation. Thus, glucocorticoids could facilitate a response to parasites that is optimized for an individual's specific challenges and life history stage. We investigated the relationship between endogenous circulating glucocorticoids and measures of resistance and tolerance to Haemosporidian parasites (including those that cause avian malaria) in red-winged blackbirds (Agelaius phoeniceus). We found that higher endogenous concentrations of circulating glucocorticoids were associated with reduced costs of parasite infection, which is indicative of higher tolerance, but were unrelated to parasite burden in free ranging, breeding male birds. Post-breeding, both males and females with higher glucocorticoid concentrations had higher measures of tolerance to Haemosporidian infection. Our findings suggest a potentially adaptive role for glucocorticoids in shifting the response to parasites to align with an individual's current physiological state and the challenges they face. |
| Databáze: | OpenAIRE |
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