Jagiellonian University Repository

Chicken or egg? : outcomes of experimental manipulations of maternally transmitted hormones depend on administration method : a meta‐analysis

Chicken or egg? : outcomes of experimental manipulations ...

Show full item record

dc.contributor.author Podmokła, Edyta [SAP14006372] pl
dc.contributor.author Drobniak, Szymon [SAP14004452] pl
dc.contributor.author Rutkowska, Joanna [SAP11018774] pl
dc.date.accessioned 2018-07-23T06:27:05Z
dc.date.available 2018-07-23T06:27:05Z
dc.date.issued 2018 pl
dc.identifier.issn 1464-7931 pl
dc.identifier.uri https://ruj.uj.edu.pl/xmlui/handle/item/56043
dc.language eng pl
dc.rights Dodaję tylko opis bibliograficzny *
dc.rights.uri *
dc.title Chicken or egg? : outcomes of experimental manipulations of maternally transmitted hormones depend on administration method : a meta‐analysis pl
dc.type JournalArticle pl
dc.description.physical 1499-1517 pl
dc.description.additional Bibliogr. s. 1513-1517 pl
dc.abstract.en Steroid hormones are important mediators of prenatal maternal effects in animals. Despite a growing number of studies involving experimental manipulation of these hormones, little is known about the impact of methodological differences among experiments on the final results expressed as offspring traits. Using ameta-analytical approach and a representative sample of experimental studies performed on birds, we tested the effect of two types of direct hormonal manipulations: manipulation of females (either by implantation of hormone pellets or injection of hormonal solutions) andmanipulation of eggs by injection. In both types ofmanipulation we looked at the effects of two groups of hormones: corticosterone and androgens in the form of testosterone and androstenedione. We found that the average effect on offspring traits differed between the manipulation types, with a well-supported positive effect of egg manipulation and lack of a significant effect of maternal manipulation. The observed average positive effect for egg manipulation was driven mainly by androgen manipulations, while corticosterone manipulations exerted no overall effect, regardless of manipulation type. Detailed analyses revealed effects of varying size and direction depending on the specific offspring traits; e.g., egg manipulation positively affected physiology and behaviour (androgens), and negatively affected future reproduction (corticosterone). Effect size was negatively related to the dose of androgen injected into the eggs, but unrelated to timing of manipulation, offspring developmental stage at the time of measuring their traits, solvent type, the site of egg injection and maternal hormone delivery method. Despite the generally acknowledged importance of maternal hormones for offspring development in birds, the overall effect of their experimental elevation is rather weak, significantly heterogeneous and dependent on the hormone and type of manipulation. We conclude by providing general recommendations as to how hormonalmanipulations should be performed in order to standardize their impact and the results achieved. We also emphasize the need for research on free-living birds with a focus on fitness-related and other long-term effects of maternal hormones. pl
dc.subject.en maternal effects, offspring fitness, development, avian egg, yolk steroids, androgen, corticosterone, testosterone, phenotypic plasticity, experimental design pl
dc.description.volume 93 pl
dc.description.number 3 pl
dc.identifier.doi 10.1111/brv.12406 pl
dc.identifier.eissn 1469-185X pl
dc.title.journal Biological Reviews pl
dc.language.container eng pl
dc.participation Rutkowska, Joanna: 20%; Drobniak, Szymon: 40%; Podmokła, Edyta: 40%; pl
dc.affiliation Wydział Biologii : Instytut Nauk o Środowisku pl
dc.subtype Article pl
dc.rights.original bez licencji pl


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)