Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs
Abstract A study of body and head development in three sympatric reproductively isolated Arctic charr ( Salvelinus alpinus (L.)) morphs from a subarctic lake (Skogsfjordvatn, northern Norway) revealed allometric trajectories that resulted in morphological differences. The three morphs were ecologica...
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crwiley:10.1002/ece3.3224 2024-09-15T17:52:23+00:00 Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs Simonsen, Marianne Knutsdotter Siwertsson, Anna Adams, Colin Ean Amundsen, Per‐Arne Præbel, Kim Knudsen, Rune 2017 http://dx.doi.org/10.1002/ece3.3224 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3224 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3224 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.3224 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 7, issue 18, page 7277-7289 ISSN 2045-7758 2045-7758 journal-article 2017 crwiley https://doi.org/10.1002/ece3.3224 2024-08-13T04:12:06Z Abstract A study of body and head development in three sympatric reproductively isolated Arctic charr ( Salvelinus alpinus (L.)) morphs from a subarctic lake (Skogsfjordvatn, northern Norway) revealed allometric trajectories that resulted in morphological differences. The three morphs were ecologically assigned to a littoral omnivore, a profundal benthivore and a profundal piscivore, and this was confirmed by genetic analyses (microsatellites). Principal component analysis was used to identify the variables responsible for most of the morphological variation of the body and head shape. The littoral omnivore and the profundal piscivore morph had convergent allometric trajectories for the most important head shape variables, developing bigger mouths and relatively smaller eyes with increasing head size. The two profundal morphs shared common trajectories for the variables explaining most of the body and head shape variation, namely head size relative to body size, placement of the dorsal and pelvic fins, eye size and mouth size. In contrast, the littoral omnivore and the profundal benthivore morphs were not on common allometric trajectories for any of the examined variables. The findings suggest that different selective pressures could have been working on traits related to their trophic niche such as habitat and diet utilization of the three morphs, with the two profundal morphs experiencing almost identical environmental conditions. Article in Journal/Newspaper Arctic charr Northern Norway Salvelinus alpinus Subarctic Wiley Online Library Ecology and Evolution 7 18 7277 7289 |
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Wiley Online Library |
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English |
description |
Abstract A study of body and head development in three sympatric reproductively isolated Arctic charr ( Salvelinus alpinus (L.)) morphs from a subarctic lake (Skogsfjordvatn, northern Norway) revealed allometric trajectories that resulted in morphological differences. The three morphs were ecologically assigned to a littoral omnivore, a profundal benthivore and a profundal piscivore, and this was confirmed by genetic analyses (microsatellites). Principal component analysis was used to identify the variables responsible for most of the morphological variation of the body and head shape. The littoral omnivore and the profundal piscivore morph had convergent allometric trajectories for the most important head shape variables, developing bigger mouths and relatively smaller eyes with increasing head size. The two profundal morphs shared common trajectories for the variables explaining most of the body and head shape variation, namely head size relative to body size, placement of the dorsal and pelvic fins, eye size and mouth size. In contrast, the littoral omnivore and the profundal benthivore morphs were not on common allometric trajectories for any of the examined variables. The findings suggest that different selective pressures could have been working on traits related to their trophic niche such as habitat and diet utilization of the three morphs, with the two profundal morphs experiencing almost identical environmental conditions. |
format |
Article in Journal/Newspaper |
author |
Simonsen, Marianne Knutsdotter Siwertsson, Anna Adams, Colin Ean Amundsen, Per‐Arne Præbel, Kim Knudsen, Rune |
spellingShingle |
Simonsen, Marianne Knutsdotter Siwertsson, Anna Adams, Colin Ean Amundsen, Per‐Arne Præbel, Kim Knudsen, Rune Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
author_facet |
Simonsen, Marianne Knutsdotter Siwertsson, Anna Adams, Colin Ean Amundsen, Per‐Arne Præbel, Kim Knudsen, Rune |
author_sort |
Simonsen, Marianne Knutsdotter |
title |
Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
title_short |
Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
title_full |
Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
title_fullStr |
Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
title_full_unstemmed |
Allometric trajectories of body and head morphology in three sympatric Arctic charr ( Salvelinus alpinus (L.)) morphs |
title_sort |
allometric trajectories of body and head morphology in three sympatric arctic charr ( salvelinus alpinus (l.)) morphs |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ece3.3224 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.3224 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.3224 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.3224 |
genre |
Arctic charr Northern Norway Salvelinus alpinus Subarctic |
genre_facet |
Arctic charr Northern Norway Salvelinus alpinus Subarctic |
op_source |
Ecology and Evolution volume 7, issue 18, page 7277-7289 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.3224 |
container_title |
Ecology and Evolution |
container_volume |
7 |
container_issue |
18 |
container_start_page |
7277 |
op_container_end_page |
7289 |
_version_ |
1810294425661734912 |