Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland
Life history strategies and potential marine niche use of Arctic charr Salvelinus alpinus ( n = 237, 84–652 mm, total body length, L T ) were determined during the ice‐free season (2012) at three different watercourses in south‐western Greenland. All Arctic charr were collected from freshwater habit...
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Online Access: | https://hdl.handle.net/10037/17409 https://doi.org/10.1111/jfb.14261 |
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ftunivtroemsoe:oai:munin.uit.no:10037/17409 2023-05-15T14:26:08+02:00 Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland Davidsen, Jan Grimsrud Power, Michael Knudsen, Rune Sjursen, Aslak Darre Rønning, Lars Kjærstad, Gaute Arnekleiv, Jo Vegar 2020-01-22 https://hdl.handle.net/10037/17409 https://doi.org/10.1111/jfb.14261 eng eng Wiley Journal of Fish Biology Davidsen J.G., Power M, Knudsen R, Sjursen AD, Rønning L, Kjærstad G, Arnekleiv JV. Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland. Journal of Fish Biology. 2020 FRIDAID 1773668 https://doi.org/10.1111/jfb.14261 0022-1112 1095-8649 https://hdl.handle.net/10037/17409 openAccess Copyright 2020 The Author(s) VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1111/jfb.14261 2021-06-25T17:57:08Z Life history strategies and potential marine niche use of Arctic charr Salvelinus alpinus ( n = 237, 84–652 mm, total body length, L T ) were determined during the ice‐free season (2012) at three different watercourses in south‐western Greenland. All Arctic charr were collected from freshwater habitats. Based on stable isotopes of δ 34 S, the Arctic charr were categorized as either marine‐ or freshwater‐dependent feeders. The use of time‐integrated trophic tracers (stable isotopes of δ 13 C, δ 15 N, δ 34 S) suggested that several trophic groups of Arctic charr operate alongside within each fjord system. The groups suggested were one group that specialized in the marine habitat, in addition to two freshwater resident morphs (small‐sized resident and/or large‐growing cannibalistic individuals). Stomach contents consisted entirely of freshwater and terrestrial prey ( i.e ., insects), indicating that marine‐dependent feeders also fed in freshwater habitats after return from their marine migration. Growth and maturity patterns further supported variable life history strategies within each watercourse. The life history strategy patterns and marine trophic niche use were consistent across the watercourses along several hundred kilometres of coastline. This study represents the first ecological baseline for partially anadromous populations of Greenland Arctic charr. Article in Journal/Newspaper Arctic Arctic charr Arctic Greenland Salvelinus alpinus University of Tromsø: Munin Open Research Archive Arctic Greenland Journal of Fish Biology 96 3 681 692 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Davidsen, Jan Grimsrud Power, Michael Knudsen, Rune Sjursen, Aslak Darre Rønning, Lars Kjærstad, Gaute Arnekleiv, Jo Vegar Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
Life history strategies and potential marine niche use of Arctic charr Salvelinus alpinus ( n = 237, 84–652 mm, total body length, L T ) were determined during the ice‐free season (2012) at three different watercourses in south‐western Greenland. All Arctic charr were collected from freshwater habitats. Based on stable isotopes of δ 34 S, the Arctic charr were categorized as either marine‐ or freshwater‐dependent feeders. The use of time‐integrated trophic tracers (stable isotopes of δ 13 C, δ 15 N, δ 34 S) suggested that several trophic groups of Arctic charr operate alongside within each fjord system. The groups suggested were one group that specialized in the marine habitat, in addition to two freshwater resident morphs (small‐sized resident and/or large‐growing cannibalistic individuals). Stomach contents consisted entirely of freshwater and terrestrial prey ( i.e ., insects), indicating that marine‐dependent feeders also fed in freshwater habitats after return from their marine migration. Growth and maturity patterns further supported variable life history strategies within each watercourse. The life history strategy patterns and marine trophic niche use were consistent across the watercourses along several hundred kilometres of coastline. This study represents the first ecological baseline for partially anadromous populations of Greenland Arctic charr. |
format |
Article in Journal/Newspaper |
author |
Davidsen, Jan Grimsrud Power, Michael Knudsen, Rune Sjursen, Aslak Darre Rønning, Lars Kjærstad, Gaute Arnekleiv, Jo Vegar |
author_facet |
Davidsen, Jan Grimsrud Power, Michael Knudsen, Rune Sjursen, Aslak Darre Rønning, Lars Kjærstad, Gaute Arnekleiv, Jo Vegar |
author_sort |
Davidsen, Jan Grimsrud |
title |
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
title_short |
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
title_full |
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
title_fullStr |
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
title_full_unstemmed |
Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland |
title_sort |
marine trophic niche-use and life history diversity among arctic charr salvelinus alpinus in southwestern greenland |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/17409 https://doi.org/10.1111/jfb.14261 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic charr Arctic Greenland Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Greenland Salvelinus alpinus |
op_relation |
Journal of Fish Biology Davidsen J.G., Power M, Knudsen R, Sjursen AD, Rønning L, Kjærstad G, Arnekleiv JV. Marine trophic niche-use and life history diversity among Arctic charr Salvelinus alpinus in southwestern Greenland. Journal of Fish Biology. 2020 FRIDAID 1773668 https://doi.org/10.1111/jfb.14261 0022-1112 1095-8649 https://hdl.handle.net/10037/17409 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1111/jfb.14261 |
container_title |
Journal of Fish Biology |
container_volume |
96 |
container_issue |
3 |
container_start_page |
681 |
op_container_end_page |
692 |
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1766298615685316608 |