Maternal corticosterone is transferred into the egg yolk

General and Comparative Endocrinology
B AlmasiL Jenni

Abstract

Hormones deposited in the avian egg are considered in many studies to influence or to adjust offspring phenotype to prevailing conditions in an adaptive way. Several studies demonstrated an effect of corticosterone, the main glucocorticoid in birds, injected into the egg on the developing chick, but the injection of steroids in the egg is far from mimicking the natural distribution of the hormone in the egg. Other studies applied a stressor or corticosterone to the mother. However it is still debated whether an increase of circulating corticosterone in the mother translates into higher concentrations of corticosterone in the egg. Therefore, we investigated in captive barn owls Tyto alba whether circulating corticosterone in egg-laying females elevated within a physiological range, resulted in the deposition of corticosterone in eggs. We found that an increase in circulating corticosterone in the mother within the naturally occurring range translated into elevated concentrations of corticosterone in the yolk of subsequently laid eggs, indicating a specific time frame and yolk layer of corticosterone deposition. We conclude that increasing maternal plasma corticosterone within a naturally occurring range is an efficient tool to i...Continue Reading

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Citations

May 23, 2015·The American Naturalist·E Keith BowersCharles F Thompson
Dec 5, 2012·Ecology Letters·M J Sheriff, O P Love
Sep 29, 2017·Integrative and Comparative Biology·Michael J SheriffOliver P Love
Mar 1, 2019·The Journal of Experimental Biology·David J WalkerKaren A Spencer
Nov 23, 2018·Proceedings. Biological Sciences·Jennifer B TennessenTracy Langkilde
May 29, 2018·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Lindsey Swierk, Tracy Langkilde
Apr 16, 2020·Frontiers in Veterinary Science·Mariana R L V PeixotoTina M Widowski
Sep 8, 2021·General and Comparative Endocrinology·Anna Miltiadous, Katherine L Buchanan

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