期刊
ECOLOGY LETTERS
卷 15, 期 3, 页码 260-266出版社
WILEY
DOI: 10.1111/j.1461-0248.2011.01735.x
关键词
Ageing; fitness; reproductive costs; reproductive success; survival
类别
资金
- National Environmental Research Council (NERC)
- European Research Council
- Royal Society
- Nando Peretti Foundation
- NERC [NE/G007330/1, NE/G013535/1] Funding Source: UKRI
- Natural Environment Research Council [NE/G007330/1, NE/G013535/1] Funding Source: researchfish
Although studies on laboratory species and natural populations of vertebrates have shown reproduction to impair later performance, little is known of the age-specific associations between reproduction and survival, and how such findings apply to the ageing of large, long-lived species. Herein we develop a framework to examine population-level patterns of reproduction and survival across lifespan in long-lived organisms, and decompose those changes into individual-level effects, and the effects of age-specific trade-offs between fitness components. We apply this to an extensive longitudinal dataset on female semi-captive Asian timber elephants (Elephas maximus) and report the first evidence of age-specific fitness declines that are driven by age-specific associations between fitness components in a long-lived mammal. Associations between reproduction and survival are positive in early life, but negative in later life with up to 71% of later-life survival declines associated with investing in the production of offspring within this population of this critically endangered species.
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