Variation in egg size and offspring phenotype among and within seven Arctic charr morphs
Maternal effects have the potential to alter early developmental processes of offspring and contribute to adaptive diversification. Egg size is a major contributor to offspring phenotype, which can influence developmental trajectories and potential resource use. However, to what extent intraspecific...
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ftpubmed:oai:pubmedcentral.nih.gov:9577412 2023-05-15T14:30:06+02:00 Variation in egg size and offspring phenotype among and within seven Arctic charr morphs Beck, Samantha V. Räsänen, Katja Kristjánsson, Bjarni K. Skúlason, Skúli Jónsson, Zophonías O. Tsinganis, Markos Leblanc, Camille A. 2022-10-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577412/ https://doi.org/10.1002/ece3.9427 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577412/ http://dx.doi.org/10.1002/ece3.9427 © 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Ecol Evol Research Articles Text 2022 ftpubmed https://doi.org/10.1002/ece3.9427 2022-10-23T01:07:03Z Maternal effects have the potential to alter early developmental processes of offspring and contribute to adaptive diversification. Egg size is a major contributor to offspring phenotype, which can influence developmental trajectories and potential resource use. However, to what extent intraspecific variation in egg size facilitates evolution of resource polymorphism is poorly understood. We studied multiple resource morphs of Icelandic Arctic charr, ranging from an anadromous morph—with a phenotype similar to the proposed ancestral phenotype—to sympatric morphs that vary in their degree of phenotypic divergence from the ancestral anadromous morph. We characterized variation in egg size and tested whether egg size influenced offspring phenotype at early life stages (i.e., timing of‐ and size at‐ hatching and first feeding [FF]). We predicted that egg size would differ among morphs and be less variable as morphs diverge away from the ancestral anadromous phenotype. We also predicted that egg size would correlate with offspring size and developmental timing. We found morphs had different egg size, developmental timing, and size at hatching and FF. Egg size increased as phenotypic proximity to the ancestral anadromous phenotype decreased, with larger eggs generally giving rise to larger offspring, especially at FF, but egg size had no effect on developmental rate. The interaction between egg size and the environment may have a profound impact on offspring fitness, where the resulting differences in early life‐history traits may act to initiate and/or maintain resource morphs diversification. Text Arctic charr Arctic PubMed Central (PMC) Arctic Ecology and Evolution 12 10 |
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Research Articles |
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Research Articles Beck, Samantha V. Räsänen, Katja Kristjánsson, Bjarni K. Skúlason, Skúli Jónsson, Zophonías O. Tsinganis, Markos Leblanc, Camille A. Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
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Research Articles |
description |
Maternal effects have the potential to alter early developmental processes of offspring and contribute to adaptive diversification. Egg size is a major contributor to offspring phenotype, which can influence developmental trajectories and potential resource use. However, to what extent intraspecific variation in egg size facilitates evolution of resource polymorphism is poorly understood. We studied multiple resource morphs of Icelandic Arctic charr, ranging from an anadromous morph—with a phenotype similar to the proposed ancestral phenotype—to sympatric morphs that vary in their degree of phenotypic divergence from the ancestral anadromous morph. We characterized variation in egg size and tested whether egg size influenced offspring phenotype at early life stages (i.e., timing of‐ and size at‐ hatching and first feeding [FF]). We predicted that egg size would differ among morphs and be less variable as morphs diverge away from the ancestral anadromous phenotype. We also predicted that egg size would correlate with offspring size and developmental timing. We found morphs had different egg size, developmental timing, and size at hatching and FF. Egg size increased as phenotypic proximity to the ancestral anadromous phenotype decreased, with larger eggs generally giving rise to larger offspring, especially at FF, but egg size had no effect on developmental rate. The interaction between egg size and the environment may have a profound impact on offspring fitness, where the resulting differences in early life‐history traits may act to initiate and/or maintain resource morphs diversification. |
format |
Text |
author |
Beck, Samantha V. Räsänen, Katja Kristjánsson, Bjarni K. Skúlason, Skúli Jónsson, Zophonías O. Tsinganis, Markos Leblanc, Camille A. |
author_facet |
Beck, Samantha V. Räsänen, Katja Kristjánsson, Bjarni K. Skúlason, Skúli Jónsson, Zophonías O. Tsinganis, Markos Leblanc, Camille A. |
author_sort |
Beck, Samantha V. |
title |
Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
title_short |
Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
title_full |
Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
title_fullStr |
Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
title_full_unstemmed |
Variation in egg size and offspring phenotype among and within seven Arctic charr morphs |
title_sort |
variation in egg size and offspring phenotype among and within seven arctic charr morphs |
publisher |
John Wiley and Sons Inc. |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577412/ https://doi.org/10.1002/ece3.9427 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic |
genre_facet |
Arctic charr Arctic |
op_source |
Ecol Evol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577412/ http://dx.doi.org/10.1002/ece3.9427 |
op_rights |
© 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.9427 |
container_title |
Ecology and Evolution |
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12 |
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10 |
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1766304023153999872 |