Evolutionary Ecology of Senescence and a Reassessment of Williams' 'Extrinsic Mortality' Hypothesis.
comparative biology
demography
fitness
life history evolution
mortality
senescence
Journal
Trends in ecology & evolution
ISSN: 1872-8383
Titre abrégé: Trends Ecol Evol
Pays: England
ID NLM: 8805125
Informations de publication
Date de publication:
06 2019
06 2019
Historique:
received:
17
04
2018
revised:
08
02
2019
accepted:
12
02
2019
pubmed:
13
3
2019
medline:
28
10
2019
entrez:
13
3
2019
Statut:
ppublish
Résumé
The evolutionary theory of senescence underpins research in life history evolution and the biology of aging. In 1957 G.C. Williams predicted that higher adult death rates select for earlier senescence and shorter length of life, but preadult mortality does not matter to the evolution of senescence. This was subsequently interpreted as predicting that senescence should be caused by 'extrinsic' sources of mortality. This idea still motivates empirical studies, although formal, mathematical theory shows it is wrong. It has nonetheless prospered because it offers an intuitive explanation for patterns observed in nature. We review the flaws in Williams' model, explore alternative explanations for comparative patterns that are consistent with the evolutionary theory of senescence, and discuss how hypotheses based on it can be tested. We argue that focusing on how sources of mortality affect ages differently offers greater insight into evolutionary processes.
Identifiants
pubmed: 30857756
pii: S0169-5347(19)30053-9
doi: 10.1016/j.tree.2019.02.006
pmc: PMC6746179
mid: NIHMS1050018
pii:
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
519-530Subventions
Organisme : NIA NIH HHS
ID : R01 AG049494
Pays : United States
Commentaires et corrections
Type : CommentIn
Type : CommentIn
Type : CommentIn
Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.
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