Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada
Arctic charr (Salvelinus alpinus (Linnaeus, 1758)) are phenotypically plastic with multiple dietary–morphological relationships observed throughout their circumpolar range. Feeding strategies often differ between Arctic charr life histories and can impact size-at-age and morphological attributes. We...
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Canadian Science Publishing
2021
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ftdoajarticles:oai:doaj.org/article:52ac3c4948fa4c91b337532dd4a66f51 2023-05-15T14:23:38+02:00 Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada A.L. Young R.F. Tallman D.H. Ogle 2021-06-01T00:00:00Z https://doi.org/10.1139/as-2019-0036 https://doaj.org/article/52ac3c4948fa4c91b337532dd4a66f51 EN FR eng fre Canadian Science Publishing https://doi.org/10.1139/as-2019-0036 https://doaj.org/toc/2368-7460 doi:10.1139/as-2019-0036 2368-7460 https://doaj.org/article/52ac3c4948fa4c91b337532dd4a66f51 Arctic Science, Vol 7, Iss 2, Pp 436-453 (2021) adaptation high arctic ontogenetic shift freshwater marine Environmental sciences GE1-350 Environmental engineering TA170-171 article 2021 ftdoajarticles https://doi.org/10.1139/as-2019-0036 2022-12-31T10:24:11Z Arctic charr (Salvelinus alpinus (Linnaeus, 1758)) are phenotypically plastic with multiple dietary–morphological relationships observed throughout their circumpolar range. Feeding strategies often differ between Arctic charr life histories and can impact size-at-age and morphological attributes. We examined growth, condition, and body morphology for two High Arctic populations of Arctic charr with anadromous and landlocked life histories. Anadromous Arctic charr had higher growth rates, achieving mean lengths two times those of landlocked Arctic charr by age 10 and had higher overall condition, particularly in the fall. Ontogenetic shifts in diet were suspected in both populations, with an abrupt shift to marine feeding in the anadromous population and a gradual shift to piscivory in the landlocked population. Morphological differences between life histories manifested most predominantly in larger eye diameter, longer pectoral and pelvic fins, and longer upper jaws of landlocked Arctic charr, suggestive of piscivorous feeding specialization of landlocked fish >350 mm. Our findings emphasize the benefits that marine feeding can have for growth and condition of freshwater fishes in Arctic environments and also convey the necessity of adaptive feeding strategies to optimize growth and condition in fishes inhabiting low-production lacustrine habitats. Article in Journal/Newspaper Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Canada Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Nunavut Arctic Science 7 2 436 453 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
adaptation high arctic ontogenetic shift freshwater marine Environmental sciences GE1-350 Environmental engineering TA170-171 |
spellingShingle |
adaptation high arctic ontogenetic shift freshwater marine Environmental sciences GE1-350 Environmental engineering TA170-171 A.L. Young R.F. Tallman D.H. Ogle Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
topic_facet |
adaptation high arctic ontogenetic shift freshwater marine Environmental sciences GE1-350 Environmental engineering TA170-171 |
description |
Arctic charr (Salvelinus alpinus (Linnaeus, 1758)) are phenotypically plastic with multiple dietary–morphological relationships observed throughout their circumpolar range. Feeding strategies often differ between Arctic charr life histories and can impact size-at-age and morphological attributes. We examined growth, condition, and body morphology for two High Arctic populations of Arctic charr with anadromous and landlocked life histories. Anadromous Arctic charr had higher growth rates, achieving mean lengths two times those of landlocked Arctic charr by age 10 and had higher overall condition, particularly in the fall. Ontogenetic shifts in diet were suspected in both populations, with an abrupt shift to marine feeding in the anadromous population and a gradual shift to piscivory in the landlocked population. Morphological differences between life histories manifested most predominantly in larger eye diameter, longer pectoral and pelvic fins, and longer upper jaws of landlocked Arctic charr, suggestive of piscivorous feeding specialization of landlocked fish >350 mm. Our findings emphasize the benefits that marine feeding can have for growth and condition of freshwater fishes in Arctic environments and also convey the necessity of adaptive feeding strategies to optimize growth and condition in fishes inhabiting low-production lacustrine habitats. |
format |
Article in Journal/Newspaper |
author |
A.L. Young R.F. Tallman D.H. Ogle |
author_facet |
A.L. Young R.F. Tallman D.H. Ogle |
author_sort |
A.L. Young |
title |
Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
title_short |
Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
title_full |
Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
title_fullStr |
Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
title_full_unstemmed |
Life history variation in Arctic charr (Salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two Arctic charr populations in Cumberland Sound, Nunavut, Canada |
title_sort |
life history variation in arctic charr (salvelinus alpinus) and the effects of diet and migration on the growth, condition, and body morphology of two arctic charr populations in cumberland sound, nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1139/as-2019-0036 https://doaj.org/article/52ac3c4948fa4c91b337532dd4a66f51 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Canada Cumberland Sound Nunavut |
geographic_facet |
Arctic Canada Cumberland Sound Nunavut |
genre |
Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Cumberland Sound Nunavut Salvelinus alpinus |
op_source |
Arctic Science, Vol 7, Iss 2, Pp 436-453 (2021) |
op_relation |
https://doi.org/10.1139/as-2019-0036 https://doaj.org/toc/2368-7460 doi:10.1139/as-2019-0036 2368-7460 https://doaj.org/article/52ac3c4948fa4c91b337532dd4a66f51 |
op_doi |
https://doi.org/10.1139/as-2019-0036 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
2 |
container_start_page |
436 |
op_container_end_page |
453 |
_version_ |
1766296140482871296 |