Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes
Accepted manuscript version. Published version available in Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes (2015) 24(1), s.148-161. . In subarctic lake systems, fish species like brown trout are often important predators, and their niche performance is a key characteristic for u...
Published in: | Ecology of Freshwater Fish |
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Online Access: | https://hdl.handle.net/10037/12851 https://doi.org/10.1111/eff.12139 |
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ftunivtroemsoe:oai:munin.uit.no:10037/12851 2023-05-15T14:30:12+02:00 Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes Sanchez-Hernandez, Javier Amundsen, Per-Arne 2014-04-29 https://hdl.handle.net/10037/12851 https://doi.org/10.1111/eff.12139 eng eng Wiley Ecology of Freshwater Fish info:eu-repo/grantAgreement/RCN/FRIMEDBIO/213610/Norway/The role of parasites in food-web topology and dynamics of subarctic lakes//. Sanchez-Hernandez, J. & Amundsen, P-A. (2015).Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes. Ecology of Freshwater Fish, 24(1), 148-161. https://doi.org/10.1111/eff.12139 FRIDAID 1192448 doi:10.1111/eff.12139 0906-6691 1600-0633 https://hdl.handle.net/10037/12851 openAccess VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Coexistence Piscivory Resource partitioning Sympatry Allopatry Journal article Tidsskriftartikkel Peer reviewed 2014 ftunivtroemsoe https://doi.org/10.1111/eff.12139 2021-06-25T17:55:30Z Accepted manuscript version. Published version available in Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes (2015) 24(1), s.148-161. . In subarctic lake systems, fish species like brown trout are often important predators, and their niche performance is a key characteristic for understanding trophic interactions and food web functioning at upper trophic levels. Here, we studied summer habitat use and stomach contents of brown trout under both allopatric and sympatric conditions in six subarctic lakes to reveal its trophic role, and population- and individual-level niche plasticity. In allopatry, brown trout mainly used the littoral habitat, but less commonly also the pelagic zone. In sympatry with stickleback, there was always a considerable habitat overlap between the two species. In contrast, sympatric populations of brown trout and Arctic charr generally revealed a distinct habitat segregation. In the sympatric systems, there was in general a distinct resource partitioning between the trout and charr, whereas the observed diet overlap between trout and stickleback was much larger. Trout modified their individual dietary specialization between the littoral and pelagic zone, always being lower in the littoral. Piscivorous behaviour of trout was only found in sympatric systems, possibly contributing to a competitive advantage of trout over charr and stickleback. Hence, the trophic level of trout was strongly related to the fish community composition, with a higher trophic level in sympatric systems where piscivorous behaviour was frequent. These changes in the trophic level of trout linked with the observed food resource partitioning might be an important mechanism in the ecosystem functioning of subarctic lakes in order to allow coexistence among sympatric-living fish species. Article in Journal/Newspaper Arctic charr Arctic Subarctic University of Tromsø: Munin Open Research Archive Arctic Ecology of Freshwater Fish 24 1 148 161 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Coexistence Piscivory Resource partitioning Sympatry Allopatry |
spellingShingle |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Coexistence Piscivory Resource partitioning Sympatry Allopatry Sanchez-Hernandez, Javier Amundsen, Per-Arne Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
topic_facet |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Coexistence Piscivory Resource partitioning Sympatry Allopatry |
description |
Accepted manuscript version. Published version available in Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes (2015) 24(1), s.148-161. . In subarctic lake systems, fish species like brown trout are often important predators, and their niche performance is a key characteristic for understanding trophic interactions and food web functioning at upper trophic levels. Here, we studied summer habitat use and stomach contents of brown trout under both allopatric and sympatric conditions in six subarctic lakes to reveal its trophic role, and population- and individual-level niche plasticity. In allopatry, brown trout mainly used the littoral habitat, but less commonly also the pelagic zone. In sympatry with stickleback, there was always a considerable habitat overlap between the two species. In contrast, sympatric populations of brown trout and Arctic charr generally revealed a distinct habitat segregation. In the sympatric systems, there was in general a distinct resource partitioning between the trout and charr, whereas the observed diet overlap between trout and stickleback was much larger. Trout modified their individual dietary specialization between the littoral and pelagic zone, always being lower in the littoral. Piscivorous behaviour of trout was only found in sympatric systems, possibly contributing to a competitive advantage of trout over charr and stickleback. Hence, the trophic level of trout was strongly related to the fish community composition, with a higher trophic level in sympatric systems where piscivorous behaviour was frequent. These changes in the trophic level of trout linked with the observed food resource partitioning might be an important mechanism in the ecosystem functioning of subarctic lakes in order to allow coexistence among sympatric-living fish species. |
format |
Article in Journal/Newspaper |
author |
Sanchez-Hernandez, Javier Amundsen, Per-Arne |
author_facet |
Sanchez-Hernandez, Javier Amundsen, Per-Arne |
author_sort |
Sanchez-Hernandez, Javier |
title |
Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
title_short |
Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
title_full |
Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
title_fullStr |
Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
title_full_unstemmed |
Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes |
title_sort |
trophic ecology of brown trout (salmo trutta l.) in subarctic lakes |
publisher |
Wiley |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/12851 https://doi.org/10.1111/eff.12139 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Subarctic |
genre_facet |
Arctic charr Arctic Subarctic |
op_relation |
Ecology of Freshwater Fish info:eu-repo/grantAgreement/RCN/FRIMEDBIO/213610/Norway/The role of parasites in food-web topology and dynamics of subarctic lakes//. Sanchez-Hernandez, J. & Amundsen, P-A. (2015).Trophic ecology of brown trout (Salmo trutta L.) in subarctic lakes. Ecology of Freshwater Fish, 24(1), 148-161. https://doi.org/10.1111/eff.12139 FRIDAID 1192448 doi:10.1111/eff.12139 0906-6691 1600-0633 https://hdl.handle.net/10037/12851 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1111/eff.12139 |
container_title |
Ecology of Freshwater Fish |
container_volume |
24 |
container_issue |
1 |
container_start_page |
148 |
op_container_end_page |
161 |
_version_ |
1766304093270179840 |