Measures of oxidative state are primarily driven by extrinsic factors in a long-distance migrant
This is the author accepted manuscript. The final version is available from the Royal Society via the DOI in this record Data accessibility: Data are available from the Dryad Digital Repository: https://doi.org/10.5061/dryad.j4k3t6f/1 [20]. Oxidative stress is a likely consequence of hard physical e...
| Published in: | Biology Letters |
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| Main Authors: | , , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Royal Society
2019
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10871/35692 https://doi.org/10.1098/rsbl.2018.0750 |
| Summary: | This is the author accepted manuscript. The final version is available from the Royal Society via the DOI in this record Data accessibility: Data are available from the Dryad Digital Repository: https://doi.org/10.5061/dryad.j4k3t6f/1 [20]. Oxidative stress is a likely consequence of hard physical exertion and thus a potential mediator of life-history trade-offs in migratory animals. However, little is known about the relative importance of intrinsic and extrinsic stressors on the oxidative state of individuals in wild populations. We quantified the relationships between air temperature, sex, body condition and three markers of oxidative state (malondialdehyde, superoxide dismutase and total antioxidant capacity) across hundreds of individuals of a long-distance migrant (the brent goose Branta bernicla hrota) during wintering and spring staging. We found that air temperature and migratory stage were the strongest predictors of oxidative state. This emphasizes the importance of extrinsic factors in regulating the oxidative state of migrating birds, with differential effects across the migration. The significance of abiotic effects demonstrates an additional mechanism by which changing climates may affect migratory costs. European Commission |
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