Testing the effect of early-life reproductive effort on age-related decline in a wild insect.

Autor: Rodríguez-Muñoz R; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom., Boonekamp JJ; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom., Liu XP; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom.; College of Forestry, Jiangxi Agricultural University, Nanchang, 330045, Jiangxi, China., Skicko I; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom., Fisher DN; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom.; Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main St West, Hamilton, Ontario, L8S 4L8, Canada., Hopwood P; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom., Tregenza T; Centre for Ecology and Conservation, School of Biosciences, University of Exeter, Penryn Campus, TR10 9FE, United Kingdom.
Jazyk: angličtina
Zdroj: Evolution; international journal of organic evolution [Evolution] 2019 Feb; Vol. 73 (2), pp. 317-328. Date of Electronic Publication: 2019 Jan 10.
DOI: 10.1111/evo.13679
Abstrakt: The disposable soma theory of ageing predicts that when organisms invest in reproduction they do so by reducing their investment in body maintenance, inducing a trade-off between reproduction and survival. Experiments on invertebrates in the lab provide support for the theory by demonstrating the predicted responses to manipulation of reproductive effort or lifespan. However, experimental studies in birds and evidence from observational (nonmanipulative) studies in nature do not consistently reveal trade-offs. Most species studied previously in the wild are mammals and birds that reproduce over multiple discrete seasons. This contrasts with temperate invertebrates, which typically have annual generations and reproduce over a single season. We expand the taxonomic range of senescence study systems to include life histories typical of most temperate invertebrates. We monitored reproductive effort, ageing, and survival in a natural field cricket population over ten years to test the prediction that individuals investing more in early-reproduction senesce faster and die younger. We found no evidence of a trade-off between early-life reproductive effort and survival, and only weak evidence for a trade-off with phenotypic senescence. We discuss the possibility that organisms with multiple discrete breeding seasons may have greater opportunities to express trade-offs between reproduction and senescence.
(© 2018 The Author(s). Evolution published by Wiley Periodicals, Inc. on behalf of The Society for the Study of Evolution.)
Databáze: MEDLINE
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