期刊
BIOLOGY LETTERS
卷 9, 期 5, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsbl.2013.0511
关键词
annual change; environmental effects; longitudinal data; seabird; telomere dynamics
资金
- Cooperation Research Programme of the Wildlife Research Centre, Kyoto University
- Japan Society for the Promotion of Science [24681006]
- Grants-in-Aid for Scientific Research [23657024, 24681006] Funding Source: KAKEN
Telomeres are regarded as markers of biological or cellular ageing because they shorten with the degree of stress exposure. Accordingly, telomere lengths should show different rates of change when animals are faced with different intensities of environmental challenges. However, a relationship between telomere length and the environment has not yet been tested within a natural setting. Here, we report longitudinal telomere dynamics in free-living, black-tailed gulls (Larus crassirostris) through the recapture of birds of a known age over 2-5 consecutive years. The rate of change in telomere lengths differed with respect to year but not sex or age. The years when gulls showed stable telomere lengths or increases in telomere lengths (from 2009 to 2010) and decreases in telomere lengths (from 2010 to 2011) were characterized by El Nino and the Great Japan Earthquake, respectively. Both events are suspected to have had long-lasting effects on food availability and/or weather conditions. Thus, our findings that telomere dynamics in long-lived birds are influenced by dramatic changes in environmental conditions highlight the importance of environmental fluctuations in affecting stress and lifespan.
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