Extraordinary lifespans in ants: a test of evolutionary theories of ageing

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ID Serval
serval:BIB_8F93055ACAEF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Extraordinary lifespans in ants: a test of evolutionary theories of ageing
Périodique
Nature
Auteur(s)
Keller  L., Genoud  M.
ISSN
0028-0836
Statut éditorial
Publié
Date de publication
10/1997
Peer-reviewed
Oui
Volume
389
Numéro
6654
Pages
958-960
Notes
Yd299 Times Cited:127 Cited References Count:29 --- Old month value: Oct 30
Résumé
Senescence presents not only a medical problem, but also an evolutionary paradox because it should be opposed by natural selection. Evolutionary hypotheses propose that ageing evolves as the necessary cost of processes increasing early reproductive success(1,2), or because of weaker selection against late-acting mutations(3). A prediction of these hypotheses is that the rate of ageing should increase and the average lifespan decrease as the rate of extrinsic mortality increases(1-7). Alternatively, non-adaptive, purely mechanistic hypotheses invoke damage to DNA, cells, tissues and organs as being the unique cause of senescence and ineluctable death of organisms(8). Here we show that the evolution of eusociality is associated with a 100-fold increase in insect lifespan. Such an increase is predicted by evolutionary theories because termite, bee and ant queens live in colonies that are sheltered and heavily defended against predators. Moreover, a comparison of ants with contrasting life histories also reveals an association between lifespan and extrinsic rate of mortality. These results provide strong support for evolutionary theories of ageing, as purely mechanistic hypotheses of senescence do not propose any association between the rate of extrinsic mortality and lifespans.
Mots-clé
independent contrasts mating frequency senescence insects hymenoptera colonies
Web of science
Création de la notice
24/01/2008 18:40
Dernière modification de la notice
20/08/2019 14:53
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