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Telomere dynamics in a long-lived bird, the barnacle goose
Dept of Biological and Environmental Sciences, Univ of Gothenburg.
Gotland University, School of Culture, Energy and Environment.
Dept of Biological and Environmental Sciences, Univ of Gothenburg.
2012 (English)In: BMC Evolutionary Biology, ISSN 1471-2148, E-ISSN 1471-2148, Vol. 12, no 257Article in journal (Refereed) Published
Abstract [en]

Theories of ageing predict a trade-off between metabolism, reproduction, and maintenance. Species with low investment in early reproduction are thus expected to be able to evolve more efficient maintenance and repair mechanisms, allowing for a longer potential life span (intrinsic longevity). The erosion of telomeres, the protective caps at the ends of linear chromosomes, plays an important role in cellular and organismal senescence, signalling the onset of age-related disease due to accumulation of unrepaired somatic damage. Using extensive longitudinal data from a long-term study of a natural population of barnacle geese Branta leucopsis, we investigated individual rates of telomere length changes over two years in 34 birds between 0 and 22 years of age, covering almost 80% of the species' lifespan. We show that telomeres in this long-lived bird are very well maintained, as theoretically expected, with an average loss rate of only 5 base pairs per year among adults. We thus found no significant relationship between change in telomere length and age. However, telomeres tended to shorten at a faster pace in juveniles compared to adults. For the first time, we demonstrate a faster telomere attrition rate in females compared to males. We found no correlation between telomere loss rate and adult survival or change in body mass. Our results add further support for a link between longevity and telomere maintenance, and highlight the complexities of telomere dynamics in natural populations.

Place, publisher, year, edition, pages
BioMed Central, 2012. Vol. 12, no 257
Keyword [en]
Telomere, barnacle goose, Branta leucopsis, longevity, senescence
National Category
Evolutionary Biology
Research subject
Biology
Identifiers
URN: urn:nbn:se:hgo:diva-1734DOI: 10.1186/1471-2148-12-257OAI: oai:DiVA.org:hgo-1734DiVA: diva2:582538
Available from: 2013-01-04 Created: 2013-01-04 Last updated: 2017-12-06Bibliographically approved

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Larsson, Kjell

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