Marasco, V., Boner, W. , Griffiths, K., Heidinger, B. and Monaghan, P. (2018) Environmental conditions shape the temporal pattern of investment in reproduction and survival. Proceedings of the Royal Society of London Series B: Biological Sciences, 285(1870), 20172442. (doi: 10.1098/rspb.2017.2442) (PMID:29298939) (PMCID:PMC5784202)
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Abstract
The relationship between environmental stress exposure and ageing is likely to vary with stressor severity, life-history stage and the time scale over which effects are measured. Such factors could influence whether stress exposure accelerates or slows the ageing process, but their interactions have not previously been experimentally investigated. We found that experimental exposure of zebra finches to mildly challenging environmental circumstances from young to old adulthood, which increased exposure to stress hormones, reduced breeding performance during early adulthood, but had positive effects when individuals were bred in old adulthood. This difference was not due to selective mortality, because the effects were evident within individuals, and no evidence of habituation in the response to the stressor was found. The more stressful environment had no effects on survival during young or old adulthood, but substantially improved survival during middle age. Changes in the effects at different ages could be due to the duration and nature of the challenging exposure, or to variation in coping capacity or strategy with age. These results show that living under challenging environmental circumstances can influence ageing trajectories in terms of both reproductive performance and longevity. Our results provide experimental support for the emerging idea that stress exposure needs to be optimized rather than minimized to obtain the best health outcomes. [Abstract copyright: © 2018 The Author(s).]
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Monaghan, Professor Pat and Griffiths, Mrs Kate and Boner, Dr Winnie and Marasco, Dr Valeria |
| Authors: | Marasco, V., Boner, W., Griffiths, K., Heidinger, B., and Monaghan, P. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine |
| Journal Name: | Proceedings of the Royal Society of London Series B: Biological Sciences |
| Publisher: | The Royal Society |
| ISSN: | 0962-8452 |
| ISSN (Online): | 1471-2954 |
| Published Online: | 03 January 2018 |
| Copyright Holders: | Copyright © 2018 The Authors |
| First Published: | First published in Proceedings of the Royal Society of London Series B: Biological Sciences 285(1870):20172442 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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