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dc.contributor.authorMorosinotto, Chiaraes_ES
dc.contributor.authorThomson, Robert L.es_ES
dc.contributor.authorKorpimäki, Erkkies_ES
dc.contributor.authorMateo, Rafaeles_ES
dc.contributor.authorRuuskanen, Suvies_ES
dc.identifier.citationJournal of Experimental Biology 222: jeb201954 (2019)es_ES
dc.description.abstractMothers may vary resource allocation to eggs and embryos, which may affect offspring fitness and prepare them for future environmental conditions. The effects of food availability and predation risk on reproduction have been extensively studied, yet their simultaneous impacts on reproductive investment and offspring early life conditions are still unclear. We experimentally manipulated these key environmental elements using a 2×2 full factorial design in wild, free-living pied flycatchers (Ficedula hypoleuca), and measured egg composition, eggshell traits and offspring condition. Eggs laid in food-supplemented nests had larger yolks and thicker shells independently of predation risk, while eggs laid in nests exposed to predator cues had lower levels of immunoglobulins, independent of food supplementation. In nests without predator cues, shell biliverdin content was higher in eggs laid in food-supplemented nests. Incubation was 1 day shorter in food-supplemented nests and shorter incubation periods were associated with higher hatching success, but there were no direct effects of maternal treatment on hatching success. To investigate the impact of maternal treatment (via egg composition) on the offspring, we performed full brood cross-fostering after hatching to unmanipulated nests. Maternal treatment did not significantly affect body mass and immunoglobulin levels of offspring. Our results suggest that although prenatal maternal cues affected egg composition, these egg-mediated effects may not have detectable consequences for offspring growth or immune capacity. Unpredictable environmental stressors may thus affect parental investment in the eggs, but parental care may level off costs and benefits of differential maternal egg allocation.es_ES
dc.description.sponsorshipThe project was funded by the Finnish Cultural Foundation (Suomen Kulttuurirahasto)-South Ostrobothnia Regional Fund and the L'Oréal-UNESCO For Women in Science award (personal grants to C.M.), and the Academy of Finland (projects 138049 to R.L.T. and 258419 to S.R.).es_ES
dc.publisherCompany of Biologistses_ES
dc.relation.isversionofPublisher's versiones_ES
dc.titleMaternal food supplementation and perceived predation risk modify egg composition and eggshell traits but not offspring conditiones_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderFinnish Cultural Foundationes_ES
dc.contributor.funderL'Oréal-UNESCO For Women in Sciencees_ES
dc.contributor.funderAcademy of Finlandes_ES
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