KOPS - The Institutional Repository of the University of Konstanz

Natural variation in yolk fatty acids, but not androgens, predicts offspring fitness in a wild bird

Natural variation in yolk fatty acids, but not androgens, predicts offspring fitness in a wild bird

Cite This

Files in this item

Checksum: MD5:9ecaa49f2cad2d75e3963036e033f342

MENTESANA, Lucia, Martin N. ANDERSSON, Stefania CASAGRANDE, Wolfgang GOYMANN, Caroline ISAKSSON, Michaela HAU, 2021. Natural variation in yolk fatty acids, but not androgens, predicts offspring fitness in a wild bird. In: Frontiers in zoology. BioMed Central. 18(1), 38. eISSN 1742-9994. Available under: doi: 10.1186/s12983-021-00422-z

@article{Mentesana2021-08-05Natur-54735, title={Natural variation in yolk fatty acids, but not androgens, predicts offspring fitness in a wild bird}, year={2021}, doi={10.1186/s12983-021-00422-z}, number={1}, volume={18}, journal={Frontiers in zoology}, author={Mentesana, Lucia and Andersson, Martin N. and Casagrande, Stefania and Goymann, Wolfgang and Isaksson, Caroline and Hau, Michaela}, note={Article Number: 38} }

Andersson, Martin N. Background<br />In egg-laying animals, mothers can influence the developmental environment and thus the phenotype of their offspring by secreting various substances into the egg yolk. In birds, recent studies have demonstrated that different yolk substances can interactively affect offspring phenotype, but the implications of such effects for offspring fitness and phenotype in natural populations have remained unclear. We measured natural variation in the content of 31 yolk components known to shape offspring phenotypes including steroid hormones, antioxidants and fatty acids in eggs of free-living great tits (Parus major) during two breeding seasons. We tested for relationships between yolk component groupings and offspring fitness and phenotypes.<br /><br />Results<br />Variation in hatchling and fledgling numbers was primarily explained by yolk fatty acids (including saturated, mono- and polyunsaturated fatty acids) - but not by androgen hormones and carotenoids, components previously considered to be major determinants of offspring phenotype. Fatty acids were also better predictors of variation in nestling oxidative status and size than androgens and carotenoids.<br /><br />Conclusions<br />Our results suggest that fatty acids are important yolk substances that contribute to shaping offspring fitness and phenotype in free-living populations. Since polyunsaturated fatty acids cannot be produced de novo by the mother, but have to be obtained from the diet, these findings highlight potential mechanisms (e.g., weather, habitat quality, foraging ability) through which environmental variation may shape maternal effects and consequences for offspring. Our study represents an important first step towards unraveling interactive effects of multiple yolk substances on offspring fitness and phenotypes in free-living populations. It provides the basis for future experiments that will establish the pathways by which yolk components, singly and/or interactively, mediate maternal effects in natural populations. eng Isaksson, Caroline Mentesana, Lucia 2021-08-26T08:57:18Z Goymann, Wolfgang Goymann, Wolfgang Casagrande, Stefania Isaksson, Caroline 2021-08-05 Andersson, Martin N. Mentesana, Lucia Casagrande, Stefania Hau, Michaela Attribution 4.0 International Hau, Michaela 2021-08-26T08:57:18Z Natural variation in yolk fatty acids, but not androgens, predicts offspring fitness in a wild bird

Downloads since Aug 26, 2021 (Information about access statistics)

Mentesana_2-1k6pkipe9n9pn9.pdf 19

This item appears in the following Collection(s)

Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International

Search KOPS


Browse

My Account