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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ftuhipublicatio:oai:pure.atira.dk:publications/fbd3587d-aa60-4b5a-81b1-681625b6a190 2024-06-23T07:48:33+00:00 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. 2020-12-01 application/pdf https://pure.uhi.ac.uk/en/publications/fbd3587d-aa60-4b5a-81b1-681625b6a190 https://doi.org/10.1186/s12861-020-00226-0 https://pureadmin.uhi.ac.uk/ws/files/24821641/s12861_020_00226_0.pdf https://bmcdevbiol.biomedcentral.com/articles/10.1186/s12861-020-00226-0 eng eng https://pure.uhi.ac.uk/en/publications/fbd3587d-aa60-4b5a-81b1-681625b6a190 info:eu-repo/semantics/openAccess Beck , S V , Räsänen , K , Leblanc , C A , Skúlason , S , Jónsson , Z O & Kristjánsson , B K 2020 , ' Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) ' , BMC Developmental Biology , vol. 20 , no. 1 . https://doi.org/10.1186/s12861-020-00226-0 article 2020 ftuhipublicatio https://doi.org/10.1186/s12861-020-00226-0 2024-05-27T23:56:27Z 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. Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus University of the Highlands and Islands: Research Database of UHI Arctic BMC Developmental Biology 20 1 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
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ftuhipublicatio |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Beck, Samantha V. Räsänen, Katja Leblanc, Camille A. Skúlason, Skúli Jónsson, Zophonías O. Kristjánsson, Bjarni K. |
spellingShingle |
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) |
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) |
publishDate |
2020 |
url |
https://pure.uhi.ac.uk/en/publications/fbd3587d-aa60-4b5a-81b1-681625b6a190 https://doi.org/10.1186/s12861-020-00226-0 https://pureadmin.uhi.ac.uk/ws/files/24821641/s12861_020_00226_0.pdf https://bmcdevbiol.biomedcentral.com/articles/10.1186/s12861-020-00226-0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Salvelinus alpinus |
op_source |
Beck , S V , Räsänen , K , Leblanc , C A , Skúlason , S , Jónsson , Z O & Kristjánsson , B K 2020 , ' Differences among families in craniofacial shape at early life-stages of Arctic charr (Salvelinus alpinus) ' , BMC Developmental Biology , vol. 20 , no. 1 . https://doi.org/10.1186/s12861-020-00226-0 |
op_relation |
https://pure.uhi.ac.uk/en/publications/fbd3587d-aa60-4b5a-81b1-681625b6a190 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1186/s12861-020-00226-0 |
container_title |
BMC Developmental Biology |
container_volume |
20 |
container_issue |
1 |
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1802638928932503552 |