Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway
During summer, native anadromous Arctic char (Salvelinus alpinus) and the alien species pink salmon (Oncorhynchus gorbuscha) now coexist in marine environments in Svalbard, following the introduction of the latter in the Barents Region. To investigate potential dietary competition between these two...
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ftunivtroemsoe:oai:munin.uit.no:10037/31548 2023-11-12T04:09:50+01:00 Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway Bengtsson, Oskar Lydersen, Christian Christensen, Guttorm Węsławski, Jan Marcin Kovacs, Kit M. 2023-09-22 https://hdl.handle.net/10037/31548 https://doi.org/10.1007/s00300-023-03196-8 eng eng Springer Nature Polar Biology Bengtsson, Lydersen, Christensen, Węsławski, Kovacs. Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway. Polar Biology. 2023 FRIDAID 2182095 doi:10.1007/s00300-023-03196-8 0722-4060 1432-2056 https://hdl.handle.net/10037/31548 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.1007/s00300-023-03196-8 2023-10-18T23:07:50Z During summer, native anadromous Arctic char (Salvelinus alpinus) and the alien species pink salmon (Oncorhynchus gorbuscha) now coexist in marine environments in Svalbard, following the introduction of the latter in the Barents Region. To investigate potential dietary competition between these two salmonid species, stomach contents from Arctic char (n=301) and pink salmon (n=28) were sampled from diferent areas within the archipelago. The most important prey in terms of biomass for both salmonid species were amphipods; Themisto libellula (B=26.0%) for Arctic char and Onisimus litoralis (B=35.0%) for pink salmon. Pianka’s niche overlap revealed that dietary overlap between the two species was moderately high (O obs =0.59); both species had strong associations with intertidal invertebrates in areas where direct comparisons were possible (Kongs orden/Kross orden). However, both salmonid species did also eat some fish, with Arctic char consuming more ofshore pelagic fish, while the small number of fish eaten by pink salmon were primarily coastal demersal fish species. Arctic char was a more generalist feeder, while pink salmon was more of a dietary specialist. Furthermore, the diet composition of the Arctic char consisted of 32.9% Atlantic prey while the pink salmon, surprisingly, ate only Arctic species, likely due to their tightly coastal feeding habits. Even though the sample size for pink salmon was low, this study contributes new insights into salmonid diets in Svalbard and the potential for introduced species to compete with native Arctic endemics, particularly in the expected warmer Arctic of the future. Article in Journal/Newspaper Arctic Arctic barents region Oncorhynchus gorbuscha Pink salmon Polar Biology Salvelinus alpinus Svalbard Themisto Themisto libellula University of Tromsø: Munin Open Research Archive Arctic Kross ENVELOPE(-21.161,-21.161,63.981,63.981) Norway Svalbard Polar Biology 46 11 1219 1234 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
During summer, native anadromous Arctic char (Salvelinus alpinus) and the alien species pink salmon (Oncorhynchus gorbuscha) now coexist in marine environments in Svalbard, following the introduction of the latter in the Barents Region. To investigate potential dietary competition between these two salmonid species, stomach contents from Arctic char (n=301) and pink salmon (n=28) were sampled from diferent areas within the archipelago. The most important prey in terms of biomass for both salmonid species were amphipods; Themisto libellula (B=26.0%) for Arctic char and Onisimus litoralis (B=35.0%) for pink salmon. Pianka’s niche overlap revealed that dietary overlap between the two species was moderately high (O obs =0.59); both species had strong associations with intertidal invertebrates in areas where direct comparisons were possible (Kongs orden/Kross orden). However, both salmonid species did also eat some fish, with Arctic char consuming more ofshore pelagic fish, while the small number of fish eaten by pink salmon were primarily coastal demersal fish species. Arctic char was a more generalist feeder, while pink salmon was more of a dietary specialist. Furthermore, the diet composition of the Arctic char consisted of 32.9% Atlantic prey while the pink salmon, surprisingly, ate only Arctic species, likely due to their tightly coastal feeding habits. Even though the sample size for pink salmon was low, this study contributes new insights into salmonid diets in Svalbard and the potential for introduced species to compete with native Arctic endemics, particularly in the expected warmer Arctic of the future. |
format |
Article in Journal/Newspaper |
author |
Bengtsson, Oskar Lydersen, Christian Christensen, Guttorm Węsławski, Jan Marcin Kovacs, Kit M. |
spellingShingle |
Bengtsson, Oskar Lydersen, Christian Christensen, Guttorm Węsławski, Jan Marcin Kovacs, Kit M. Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
author_facet |
Bengtsson, Oskar Lydersen, Christian Christensen, Guttorm Węsławski, Jan Marcin Kovacs, Kit M. |
author_sort |
Bengtsson, Oskar |
title |
Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
title_short |
Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
title_full |
Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
title_fullStr |
Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
title_full_unstemmed |
Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway |
title_sort |
marine diets of anadromous arctic char (salvelinus alpinus) and pink salmon (oncorhynchus gorbuscha) in svalbard, norway |
publisher |
Springer Nature |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/31548 https://doi.org/10.1007/s00300-023-03196-8 |
long_lat |
ENVELOPE(-21.161,-21.161,63.981,63.981) |
geographic |
Arctic Kross Norway Svalbard |
geographic_facet |
Arctic Kross Norway Svalbard |
genre |
Arctic Arctic barents region Oncorhynchus gorbuscha Pink salmon Polar Biology Salvelinus alpinus Svalbard Themisto Themisto libellula |
genre_facet |
Arctic Arctic barents region Oncorhynchus gorbuscha Pink salmon Polar Biology Salvelinus alpinus Svalbard Themisto Themisto libellula |
op_relation |
Polar Biology Bengtsson, Lydersen, Christensen, Węsławski, Kovacs. Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway. Polar Biology. 2023 FRIDAID 2182095 doi:10.1007/s00300-023-03196-8 0722-4060 1432-2056 https://hdl.handle.net/10037/31548 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.1007/s00300-023-03196-8 |
container_title |
Polar Biology |
container_volume |
46 |
container_issue |
11 |
container_start_page |
1219 |
op_container_end_page |
1234 |
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1782329625124274176 |