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Evolution Under Dietary Restriction Decouples Survival From Fecundity in Drosophila melanogaster Females

Zajitschek, F, Georgolopoulos, G, Vourlou, A, Ericsson, M, Zajitschek, SRK, Friberg, U and Maklakov, AA (2018) Evolution Under Dietary Restriction Decouples Survival From Fecundity in Drosophila melanogaster Females. Journals of Gerontology Series A: Biomedical Sciences and Medical Sciences, 74 (10). pp. 1542-1548. ISSN 1079-5006

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Abstract

One of the key tenets of life-history theory is that reproduction and survival are linked and that they trade-off with each other. When dietary resources are limited, reduced reproduction with a concomitant increase in survival is commonly observed. It is often hypothesised that this dietary restriction (DR) effect results from strategically reduced investment in reproduction in favour of somatic maintenance in order to survive starvation periods until resources become plentiful again. We used experimental evolution to test this “waiting-for-the-good-times” hypothesis, which predicts that selection under sustained DR will favour increased investment in reproduction at the cost of survival because “good times” never come. We assayed fecundity and survival of female Drosophila melanogaster fruit flies that had evolved for 50 generations on three different diets varying in protein content – low (classic DR diet), standard and high, in a full-factorial design. High-diet females evolved overall increased fecundity but showed reduced survival on low and standard diets. Low-diet females evolved reduced survival on low diet without corresponding increase in reproduction. In general, there was little correspondence between the evolution of survival and fecundity across all dietary regimes. Our results contradict the hypothesis that resource reallocation between fecundity and somatic maintenance underpins lifespan extension under DR.

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced version of an article accepted for publication in Journals of Gerontology Series A: Biomedical Sciences and Medical Sciences following peer review. The version of record Felix Zajitschek, PhD, Grigorios Georgolopoulos, MSc, Anna Vourlou, BSc, Maja Ericsson, BSc, Susanne R K Zajitschek, PhD, Urban Friberg, PhD, Alexei A Maklakov, PhD, Evolution Under Dietary Restriction Decouples Survival From Fecundity in Drosophila melanogaster Females, The Journals of Gerontology: Series A, Volume 74, Issue 10, October 2019, Pages 1542–1548, is available online at: https://dx.doi.org/10.1093/gerona/gly070
Uncontrolled Keywords: 1103 Clinical Sciences
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
T Technology > TX Home economics > TX341 Nutrition. Foods and food supply
Q Science > QH Natural history > QH301 Biology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: Oxford University Press (OUP)
Related URLs:
Date Deposited: 24 May 2021 08:34
Last Modified: 24 May 2021 08:34
DOI or Identification number: 10.1093/gerona/gly070
URI: https://researchonline.ljmu.ac.uk/id/eprint/15032

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