Reproductive senescence in a long-lived seabird: Rates of decline in late-life performance are associated with varying costs of early reproduction

Thomas E. Reed*, Loeske E.B. Kruuk, Sarah Wanless, Morten Frederiksen, Emma J.A. Cunningham, Michael P. Harris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

200 Citations (Scopus)

Abstract

Evolutionary theories of senescence predict that rates of decline in performance parameters should be shaped by early-life trade-offs between reproduction and somatic maintenance. Here we investigate factors influencing the rate of reproductive senescence in a long-lived seabird, the common guillemot Uria aalge, using data collected over a 23-year period. In the last 3 years of life, individual guillemots had significantly reduced breeding success and were less likely to hold a site or attempt to breed. Females senesced at a significantly faster rate than males. At the individual level, high levels of reproductive output earlier in life were associated with increased senescence later in life. This trade-off between early- and late-life reproduction was evident independent of the fact that as birds age, they breed later in the season. The rate of senescence was additionally dependent on environmental conditions experienced earlier in life, with evidence that harsh conditions amplified later declines in breeding success. Overall, individuals with intermediate levels of early-life productivity lived longer. These results provide support for the antagonistic-pleiotropy and disposable-soma theories of senescence and demonstrate for the first time in a wild bird population that increased rates of senescence in reproductive performance are associated with varying costs of reproduction early in life.

Original languageEnglish
Pages (from-to)E89-E101
JournalAmerican Naturalist
Volume171
Issue number2
DOIs
Publication statusPublished - Feb 2008
Externally publishedYes

Fingerprint

Dive into the research topics of 'Reproductive senescence in a long-lived seabird: Rates of decline in late-life performance are associated with varying costs of early reproduction'. Together they form a unique fingerprint.

Cite this