Evolution of ageing, costs of reproduction and the fecundity-longevity trade-off in eusocial insects.

Détails

Ressource 1Télécharger: Blacher et al 2017.pdf (585.20 [Ko])
Etat: Public
Version: Final published version
Document(s) secondaire(s)
Télécharger: Blacher et al_RSPB-2017-0380_ESM_FigS1-S4_TablesS1-S9.pdf (196.45 [Ko])
Etat: Public
Version: Supplementary document
ID Serval
serval:BIB_394413B7E360
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evolution of ageing, costs of reproduction and the fecundity-longevity trade-off in eusocial insects.
Périodique
Proceedings of the Royal Society B: Biological Sciences
Auteur(s)
Blacher P., Huggins T.J., Bourke AFG
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2017
Peer-reviewed
Oui
Volume
284
Numéro
1858
Pages
20170380
Langue
anglais
Résumé
Eusocial insects provide special opportunities to elucidate the evolution of ageing as queens have apparently evaded costs of reproduction and reversed the fecundity-longevity trade-off generally observed in non-social organisms. But how reproduction affects longevity in eusocial insects has rarely been tested experimentally. In this study, we took advantage of the reproductive plasticity of workers to test the causal role of reproduction in determining longevity in eusocial insects. Using the eusocial bumblebee Bombus terrestris, we found that, in whole colonies, in which workers could freely 'choose' whether to become reproductive, workers' level of ovarian activation was significantly positively associated with longevity and ovary-active workers significantly outlived ovary-inactive workers. By contrast, when reproductivity was experimentally induced in randomly selected workers, thereby decoupling it from other traits, workers' level of ovarian activation was significantly negatively associated with longevity and ovary-active workers were significantly less long-lived than ovary-inactive workers. These findings show that workers experience costs of reproduction and suggest that intrinsically high-quality individuals can overcome these costs. They also raise the possibility that eusocial insect queens exhibit condition-dependent longevity and hence call into question whether eusociality entails a truly reversed fecundity-longevity trade-off involving a fundamental remodelling of conserved genetic and endocrine networks underpinning ageing.

Mots-clé
bee, lifespan, life history, senescence, social insect
Pubmed
Web of science
Open Access
Oui
Création de la notice
18/07/2017 22:42
Dernière modification de la notice
20/08/2019 13:28
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