Senescent birds redouble reproductive effort when ill: confirmation of the terminal investment hypothesis

@article{Velando2006SenescentBR,
  title={Senescent birds redouble reproductive effort when ill: confirmation of the terminal investment hypothesis},
  author={Alberto Velando and Hugh Drummond and Roxana Torres},
  journal={Proceedings of the Royal Society B: Biological Sciences},
  year={2006},
  volume={273},
  pages={1443 - 1448}
}
This study reports an experimental confirmation of the terminal investment hypothesis, a longstanding theoretical idea that animals should increase their reproductive effort as they age and their prospects for survival and reproduction decline. Previous correlational and experimental attempts to test this hypothesis have yielded contradictory results. In the blue-footed booby, Sula nebouxii, a long-lived bird, after initial increase, male reproductive success declines progressively with age… 
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TLDR
Combining 50 years of continuous demographic records for the Cayo Santiago rhesus macaque population with new morphometric and behavioral data provides strong evidence for the occurrence of reproductive senescence in free-ranging female rhesu macaques and is consistent with some of the predictions of the terminal investment hypothesis.
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TLDR
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Testing the Terminal Investment Hypothesis in California Oaks
TLDR
This hypothesis is tested by comparing relative acorn production and radial growth among 1,000+ mature individuals of eight species of California oaks followed for up to 37 years, during which time 70 trees died apparently natural deaths.
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