Show simple item record

Files in this item


Item metadata

dc.contributor.authorBarbosa, Miguel
dc.contributor.authorLopes, Isabel
dc.contributor.authorVenâncio, Catia
dc.contributor.authorJaneiro Silva, Maria Joao
dc.contributor.authorMorrissey, Michael Blair
dc.contributor.authorSoares, Amadeu M.V.M.
dc.identifier.citationBarbosa , M , Lopes , I , Venâncio , C , Janeiro Silva , M J , Morrissey , M B & Soares , A M V M 2015 , ' Maternal response to environmental unpredictability ' , Ecology and Evolution , vol. Early view .
dc.identifier.otherPURE: 221849954
dc.identifier.otherPURE UUID: 1530a7cd-9b34-4b27-8a55-9fdc51cf5f87
dc.identifier.otherBibtex: urn:e3f6ba3ca1de5186523119928adbdd0b
dc.identifier.otherORCID: /0000-0003-0327-9580/work/60630779
dc.identifier.otherWOS: 000363731500007
dc.descriptionThis study was funded by a postdoctoral fellowship to MB (SFRH/BPD/82259/2011) and with a “Bolsista CAPES/BRASIL,” (Project A058/2013) to AMVMS.en
dc.description.abstractMothers are expected to use environmental cues to modify maternal investment to optimize their fitness. However, when the environment varies unpredictably, cues may not be an accurate proxy of future conditions. Under such circumstances, selection favors a diversifying maternal investment strategy. While there is evidence that the environment is becoming more uncertain, the extent to which mothers are able to respond to this unpredictability is generally unknown. In this study, we test the hypothesis that Daphnia magna increase the variance in maternal investment in response to unpredictable variation in temperature consistent with global change predictions. We detected significant variability across temperature treatments in brood size, neonate size at birth, and time between broods. The estimated variability within-brood size was higher (albeit not statistically significant) in mothers reared in unpredictable temperature conditions. We also detected a cross-generational effect with the temperature history of mothers modulating the phenotypic response of F1's. Notably, our results diverged from the prediction that increased variability poses a greater risk to organisms than changes in mean temperature. Increased unpredictability in temperature had negligible effects on fitness-correlated traits. Mothers in the unpredictable treatment, survived as long, and produced as many F1's during lifetime as those produced in the most fecund treatment. Further, increased unpredictability in temperature did not affect the probability of survival of F1's. Collectively, we provide evidence that daphnia respond effectively to thermal unpredictability. But rather than increasing the variance in maternal investment, daphnia respond to uncertainty by being a jack of all temperatures, master of none. Importantly, our study highlights the essential need to examine changes in variances rather than merely on means, when investigating maternal responses.
dc.relation.ispartofEcology and Evolutionen
dc.rights© 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License (, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectJack of all tradesen
dc.subjectMaternal Investmenten
dc.subjectTrans-generational effectsen
dc.subjectQH301 Biologyen
dc.titleMaternal response to environmental unpredictabilityen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Centre for Biological Diversityen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record