Sex-specific telomere length and dynamics in relation to age and reproductive success in Cory's shearwaters.

Molecular Ecology
Christina BauchPaulo Catry

Abstract

Individuals in free-living animal populations generally differ substantially in reproductive success, lifespan and other fitness-related traits, but the molecular mechanisms underlying this variation are poorly understood. Telomere length and dynamics are candidate traits explaining this variation, as long telomeres predict a higher survival probability and telomere loss has been shown to reflect experienced "life stress." However, telomere dynamics among very long-lived species are unresolved. Additionally, it is generally not well understood how telomeres relate to reproductive success or sex. We measured telomere length and dynamics in erythrocytes to assess their relationship to age, sex and reproduction in Cory's shearwaters (Calonectris borealis), a long-lived seabird, in the context of a long-term study. Adult males had on average 231 bp longer telomeres than females, independent of age. In females, telomere length changed relatively little with age, whereas male telomere length declined significantly. Telomere shortening within males from one year to the next was three times higher than the interannual shortening rate based on cross-sectional data of males. Past long-term reproductive success was sex-specifically reflec...Continue Reading

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Citations

Oct 14, 2020·Molecular Ecology Resources·Megan L PowerEmma C Teeling
Jan 19, 2021·Molecular Ecology·Oscar VedderSandra Bouwhuis
May 27, 2021·Proceedings. Biological Sciences·Britt J HeidingerDavid F Westneat
Jun 3, 2021·Cells·Maria Sol Jacome Burbano, Eric Gilson

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Methods Mentioned

BETA
electrophoresis

Software Mentioned

imagej
lme4
lmertest
mumin
R Core

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