Journal
FUNCTIONAL ECOLOGY
Volume 27, Issue 2, Pages 342-350Publisher
WILEY
DOI: 10.1111/1365-2435.12041
Keywords
American redstart; habitat; Setophaga ruticilla; survival; telomere dynamics
Categories
Funding
- NSF [0717338, 0649679]
- European Community [237034]
- Direct For Biological Sciences
- Division Of Environmental Biology [1242584] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems
- Direct For Biological Sciences [0745156] Funding Source: National Science Foundation
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Telomeres are long repetitive noncoding sequences of DNA located at the ends of chromosomes. Recently, the study of telomere dynamics has been increasingly used to investigate ecological questions. However, little is currently known about the relationships that link environmental conditions, telomere dynamics and fitness in wild vertebrates. Using a small migratory bird (American redstart, Setophaga ruticilla), we investigated how telomere dynamics can be affected by non-breeding habitat quality and to what extent telomere length can predict the return rate of males. We show that telomeres shorten in most individuals over a 1-year period and, importantly, that telomeres of individuals wintering in a low-quality habitat shorten more than those of individuals wintering in a high-quality habitat. In addition, we found that longer telomeres are associated with a higher return rate than shorter telomeres, although the relationship between return rate and telomere length did not depend on habitat quality. Our study suggests that telomere dynamics are affected by environmental conditions and are related to indices of fitness in a migratory bird species.
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