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Viviparous mothers impose stronger glucocorticoid-mediated maternal stress effects on their offspring than oviparous mothers

Citation

MacLeod, KJ and While, GM and Uller, T, Viviparous mothers impose stronger glucocorticoid-mediated maternal stress effects on their offspring than oviparous mothers, Ecology and Evolution, 11, (23) pp. 17238-17259. ISSN 2045-7758 (2021) [Refereed Article]


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Copyright 2021 The Authors Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1002/ece3.8360

Abstract

Maternal stress during gestation has the potential to affect offspring development via changes in maternal physiology, such as increases in circulating levels of glucocorticoid hormones that are typical after exposure to a stressor. While the effects of elevated maternal glucocorticoids on offspring phenotype (i.e., "glucocorticoid-mediated maternal effects") have been relatively well established in laboratory studies, it remains poorly understood how strong and consistent such effects are in natural populations. Using a meta-analysis of studies of wild mammals, birds, and reptiles, we investigate the evidence for effects of elevated maternal glucocorticoids on offspring phenotype and investigate key moderators that might influence the strength and direction of these effects. In particular, we investigate the potential importance of reproductive mode (viviparity vs. oviparity). We show that glucocorticoid-mediated maternal effects are stronger, and likely more deleterious, in mammals and viviparous squamate reptiles compared with birds, turtles, and oviparous squamates. Effects on offspring traits were more strongly negative when measured at or close to birth; no other moderators (timing and type of manipulation, or type of trait measured) were significant predictors of the strength or direction of the phenotypic effects on offspring. These results provide evidence that the evolution of a prolonged physiological association between embryo and mother sets the stage for maladaptive, or adaptive, prenatal stress effects in vertebrates driven by glucocorticoid elevation.

Item Details

Item Type:Refereed Article
Keywords:glucocorticoids, maternal effects, maternal stress, meta-analysis, viviparity
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Comparative physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:While, GM (Dr Geoff While)
ID Code:149379
Year Published:2021
Deposited By:Zoology
Deposited On:2022-03-28
Last Modified:2022-05-18
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