Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus)
Background Organismal fitness can be determined at early life-stages, but phenotypic variation at early life-stages is rarely considered in studies on evolutionary diversification. The trophic apparatus has been shown to contribute to sympatric resource-mediated divergence in several taxa. However,...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/449014 2023-05-15T14:30:06+02:00 Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) Beck, Samantha V. Räsänen, Katja Leblanc, Camille A. Skúlason, Skúli Jónsson, Zophonías O. Kristjánsson, Bjarni K. 2020 application/application/pdf https://hdl.handle.net/20.500.11850/449014 https://doi.org/10.3929/ethz-b-000449014 en eng BioMed Central info:eu-repo/semantics/altIdentifier/doi/10.1186/s12861-020-00226-0 info:eu-repo/semantics/altIdentifier/wos/000584387300001 http://hdl.handle.net/20.500.11850/449014 doi:10.3929/ethz-b-000449014 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY BMC Developmental Biology, 20 (1) Developmental plasticity Maternal effects Ontogeny Phenotypic divergence Trophic morphology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftethz https://doi.org/20.500.11850/449014 https://doi.org/10.3929/ethz-b-000449014 https://doi.org/10.1186/s12861-020-00226-0 2022-04-25T14:15:39Z Background Organismal fitness can be determined at early life-stages, but phenotypic variation at early life-stages is rarely considered in studies on evolutionary diversification. The trophic apparatus has been shown to contribute to sympatric resource-mediated divergence in several taxa. However, processes underlying diversification in trophic traits are poorly understood. Using phenotypically variable Icelandic Arctic charr (Salvelinus alpinus), we reared offspring from multiple families under standardized laboratory conditions and tested to what extent family (i.e. direct genetic and maternal effects) contributes to offspring morphology at hatching (H) and first feeding (FF). To understand the underlying mechanisms behind early life-stage variation in morphology, we examined how craniofacial shape varied according to family, offspring size, egg size and candidate gene expression. Results Craniofacial shape (i.e. the Meckel’s cartilage and hyoid arch) was more variable between families than within families both across and within developmental stages. Differences in craniofacial morphology between developmental stages correlated with offspring size, whilst within developmental stages only shape at FF correlated with offspring size, as well as female mean egg size. Larger offspring and offspring from females with larger eggs consistently had a wider hyoid arch and contracted Meckel’s cartilage in comparison to smaller offspring. Conclusions This study provides evidence for family-level variation in early life-stage trophic morphology, indicating the potential for parental effects to facilitate resource polymorphism. ISSN:1471-213X Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus ETH Zürich Research Collection Arctic |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Developmental plasticity Maternal effects Ontogeny Phenotypic divergence Trophic morphology |
spellingShingle |
Developmental plasticity Maternal effects Ontogeny Phenotypic divergence Trophic morphology Beck, Samantha V. Räsänen, Katja Leblanc, Camille A. Skúlason, Skúli Jónsson, Zophonías O. Kristjánsson, Bjarni K. Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
topic_facet |
Developmental plasticity Maternal effects Ontogeny Phenotypic divergence Trophic morphology |
description |
Background Organismal fitness can be determined at early life-stages, but phenotypic variation at early life-stages is rarely considered in studies on evolutionary diversification. The trophic apparatus has been shown to contribute to sympatric resource-mediated divergence in several taxa. However, processes underlying diversification in trophic traits are poorly understood. Using phenotypically variable Icelandic Arctic charr (Salvelinus alpinus), we reared offspring from multiple families under standardized laboratory conditions and tested to what extent family (i.e. direct genetic and maternal effects) contributes to offspring morphology at hatching (H) and first feeding (FF). To understand the underlying mechanisms behind early life-stage variation in morphology, we examined how craniofacial shape varied according to family, offspring size, egg size and candidate gene expression. Results Craniofacial shape (i.e. the Meckel’s cartilage and hyoid arch) was more variable between families than within families both across and within developmental stages. Differences in craniofacial morphology between developmental stages correlated with offspring size, whilst within developmental stages only shape at FF correlated with offspring size, as well as female mean egg size. Larger offspring and offspring from females with larger eggs consistently had a wider hyoid arch and contracted Meckel’s cartilage in comparison to smaller offspring. Conclusions This study provides evidence for family-level variation in early life-stage trophic morphology, indicating the potential for parental effects to facilitate resource polymorphism. ISSN:1471-213X |
format |
Article in Journal/Newspaper |
author |
Beck, Samantha V. Räsänen, Katja Leblanc, Camille A. Skúlason, Skúli Jónsson, Zophonías O. Kristjánsson, Bjarni K. |
author_facet |
Beck, Samantha V. Räsänen, Katja Leblanc, Camille A. Skúlason, Skúli Jónsson, Zophonías O. Kristjánsson, Bjarni K. |
author_sort |
Beck, Samantha V. |
title |
Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
title_short |
Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
title_full |
Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
title_fullStr |
Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
title_full_unstemmed |
Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) |
title_sort |
differences among families in craniofacial shape at early life-stages of arctic charr (salvelinus alpinus) |
publisher |
BioMed Central |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.11850/449014 https://doi.org/10.3929/ethz-b-000449014 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
BMC Developmental Biology, 20 (1) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1186/s12861-020-00226-0 info:eu-repo/semantics/altIdentifier/wos/000584387300001 http://hdl.handle.net/20.500.11850/449014 doi:10.3929/ethz-b-000449014 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/449014 https://doi.org/10.3929/ethz-b-000449014 https://doi.org/10.1186/s12861-020-00226-0 |
_version_ |
1766304024236130304 |