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 ecological...
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ftdoajarticles:oai:doaj.org/article:34430c097017478ca383581efb6cd7c9 2023-05-15T14:30:06+02:00 Allometric trajectories of body and head morphology in three sympatric Arctic charr (Salvelinus alpinus (L.)) morphs Marianne Knutsdotter Simonsen Anna Siwertsson Colin Ean Adams Per‐Arne Amundsen Kim Præbel Rune Knudsen 2017-09-01T00:00:00Z https://doi.org/10.1002/ece3.3224 https://doaj.org/article/34430c097017478ca383581efb6cd7c9 EN eng Wiley https://doi.org/10.1002/ece3.3224 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.3224 https://doaj.org/article/34430c097017478ca383581efb6cd7c9 Ecology and Evolution, Vol 7, Iss 18, Pp 7277-7289 (2017) niche segregation phenotypic diversity polymorphism salmonids Ecology QH540-549.5 article 2017 ftdoajarticles https://doi.org/10.1002/ece3.3224 2022-12-31T15:32:18Z 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 Arctic Northern Norway Salvelinus alpinus Subarctic Directory of Open Access Journals: DOAJ Articles Arctic Norway Ecology and Evolution 7 18 7277 7289 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
niche segregation phenotypic diversity polymorphism salmonids Ecology QH540-549.5 |
spellingShingle |
niche segregation phenotypic diversity polymorphism salmonids Ecology QH540-549.5 Marianne Knutsdotter Simonsen Anna Siwertsson Colin Ean Adams Per‐Arne Amundsen Kim Præbel Rune Knudsen Allometric trajectories of body and head morphology in three sympatric Arctic charr (Salvelinus alpinus (L.)) morphs |
topic_facet |
niche segregation phenotypic diversity polymorphism salmonids Ecology QH540-549.5 |
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 |
Marianne Knutsdotter Simonsen Anna Siwertsson Colin Ean Adams Per‐Arne Amundsen Kim Præbel Rune Knudsen |
author_facet |
Marianne Knutsdotter Simonsen Anna Siwertsson Colin Ean Adams Per‐Arne Amundsen Kim Præbel Rune Knudsen |
author_sort |
Marianne Knutsdotter Simonsen |
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 |
https://doi.org/10.1002/ece3.3224 https://doaj.org/article/34430c097017478ca383581efb6cd7c9 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic charr Arctic Northern Norway Salvelinus alpinus Subarctic |
genre_facet |
Arctic charr Arctic Northern Norway Salvelinus alpinus Subarctic |
op_source |
Ecology and Evolution, Vol 7, Iss 18, Pp 7277-7289 (2017) |
op_relation |
https://doi.org/10.1002/ece3.3224 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.3224 https://doaj.org/article/34430c097017478ca383581efb6cd7c9 |
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_ |
1766304017658413056 |