Reproductive and post-reproductive life history of wild-caught Drosophila melanogaster under laboratory conditions.

Détails

ID Serval
serval:BIB_8A4E45416031
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Reproductive and post-reproductive life history of wild-caught Drosophila melanogaster under laboratory conditions.
Périodique
Journal of Evolutionary Biology
Auteur⸱e⸱s
Klepsatel P., Gáliková M., De Maio N., Ricci S., Schlötterer C., Flatt T.
ISSN
1420-9101 (Electronic)
ISSN-L
1010-061X
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
26
Numéro
7
Pages
1508-1520
Langue
anglais
Résumé
The life history of the fruit fly (Drosophila melanogaster) is well understood, but fitness components are rarely measured by following single individuals over their lifetime, thereby limiting insights into lifetime reproductive success, reproductive senescence and post-reproductive lifespan. Moreover, most studies have examined long-established laboratory strains rather than freshly caught individuals and may thus be confounded by adaptation to laboratory culture, inbreeding or mutation accumulation. Here, we have followed the life histories of individual females from three recently caught, non-laboratory-adapted wild populations of D. melanogaster. Populations varied in a number of life-history traits, including ovariole number, fecundity, hatchability and lifespan. To describe individual patterns of age-specific fecundity, we developed a new model that allowed us to distinguish four phases during a female's life: a phase of reproductive maturation, followed by a period of linear and then exponential decline in fecundity and, finally, a post-ovipository period. Individual females exhibited clear-cut fecundity peaks, which contrasts with previous analyses, and post-peak levels of fecundity declined independently of how long females lived. Notably, females had a pronounced post-reproductive lifespan, which on average made up 40% of total lifespan. Post-reproductive lifespan did not differ among populations and was not correlated with reproductive fitness components, supporting the hypothesis that this period is a highly variable, random 'add-on' at the end of reproductive life rather than a correlate of selection on reproductive fitness. Most life-history traits were positively correlated, a pattern that might be due to genotype by environment interactions when wild flies are brought into a novel laboratory environment but that is unlikely explained by inbreeding or positive mutational covariance caused by mutation accumulation.
Mots-clé
Drosophila melanogaster, individual fecundity, laboratory conditions, life history, post-reproductive lifespan, reproductive senescence, reproductive success, wild-caught populations
Pubmed
Web of science
Open Access
Oui
Création de la notice
10/04/2013 11:09
Dernière modification de la notice
20/08/2019 15:49
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