Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway
Recent large influxes of non-native Pacific pink salmon (Oncorhynchus gorbuscha) to North European rivers have raised concern over their potential negative impacts on native salmonids and recipient ecosystems. The eggs and carcasses of semelparous pink salmon may provide a significant nutrient and e...
Published in: | Ecology of Freshwater Fish |
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Language: | English |
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2020
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Online Access: | https://hdl.handle.net/11250/2688653 https://doi.org/10.1111/eff.12582 |
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ftimr:oai:imr.brage.unit.no:11250/2688653 2023-05-15T15:31:50+02:00 Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway Dunlop, Katherine Mary Eloranta, Antti Schoen, Erik Wipfli, Mark Jensen, Jenny Lovisa Alexandra Muladal, Rune Christensen, Guttorm N. 2020 application/pdf https://hdl.handle.net/11250/2688653 https://doi.org/10.1111/eff.12582 eng eng Andre: FRAM - High North Research Centre for Climate and the Enviro urn:issn:0906-6691 https://hdl.handle.net/11250/2688653 https://doi.org/10.1111/eff.12582 cristin:1849015 Ecology of Freshwater Fish VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Peer reviewed Journal article 2020 ftimr https://doi.org/10.1111/eff.12582 2021-09-23T20:15:12Z Recent large influxes of non-native Pacific pink salmon (Oncorhynchus gorbuscha) to North European rivers have raised concern over their potential negative impacts on native salmonids and recipient ecosystems. The eggs and carcasses of semelparous pink salmon may provide a significant nutrient and energy subsidy to native biota, but this phenomenon has not been widely documented outside the species' native distribution. We analysed the stomach contents and stable isotope values (δ15N and δ13C) in muscle and liver tissues of juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) to determine whether these native salmonids utilise marine-derived nutrients and energy provided by pink salmon eggs and carcasses in the subarctic river system Vesterelva, northern Norway. Although egg foraging and assimilation of marine-derived nutrients in fish body tissues were found to be minor at the population level, a few juvenile salmon and trout had recently eaten large quantities of pink salmon eggs. Some of these individuals also had high δ15N and δ13C values, indicating a long-term diet subsidised by marine-derived nutrients and energy from pink salmon eggs. Hence, our study provides novel evidence that the eggs of invasive pink salmon may provide an energetic, profitable food resource for juvenile native fish. More research is needed to understand the broader ecological implications for fishes and other biota in river ecosystems invaded by pink salmon. egg predation, marine-derived nutrients, non-native salmonids, resource subsidy, stable isotope analysis, subarctic river publishedVersion Article in Journal/Newspaper Atlantic salmon Northern Norway Oncorhynchus gorbuscha Pink salmon Salmo salar Subarctic Institute for Marine Research: Brage IMR Norway Pacific Vesterelva ENVELOPE(13.158,13.158,65.618,65.618) Ecology of Freshwater Fish 30 2 270 283 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Dunlop, Katherine Mary Eloranta, Antti Schoen, Erik Wipfli, Mark Jensen, Jenny Lovisa Alexandra Muladal, Rune Christensen, Guttorm N. Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Recent large influxes of non-native Pacific pink salmon (Oncorhynchus gorbuscha) to North European rivers have raised concern over their potential negative impacts on native salmonids and recipient ecosystems. The eggs and carcasses of semelparous pink salmon may provide a significant nutrient and energy subsidy to native biota, but this phenomenon has not been widely documented outside the species' native distribution. We analysed the stomach contents and stable isotope values (δ15N and δ13C) in muscle and liver tissues of juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) to determine whether these native salmonids utilise marine-derived nutrients and energy provided by pink salmon eggs and carcasses in the subarctic river system Vesterelva, northern Norway. Although egg foraging and assimilation of marine-derived nutrients in fish body tissues were found to be minor at the population level, a few juvenile salmon and trout had recently eaten large quantities of pink salmon eggs. Some of these individuals also had high δ15N and δ13C values, indicating a long-term diet subsidised by marine-derived nutrients and energy from pink salmon eggs. Hence, our study provides novel evidence that the eggs of invasive pink salmon may provide an energetic, profitable food resource for juvenile native fish. More research is needed to understand the broader ecological implications for fishes and other biota in river ecosystems invaded by pink salmon. egg predation, marine-derived nutrients, non-native salmonids, resource subsidy, stable isotope analysis, subarctic river publishedVersion |
format |
Article in Journal/Newspaper |
author |
Dunlop, Katherine Mary Eloranta, Antti Schoen, Erik Wipfli, Mark Jensen, Jenny Lovisa Alexandra Muladal, Rune Christensen, Guttorm N. |
author_facet |
Dunlop, Katherine Mary Eloranta, Antti Schoen, Erik Wipfli, Mark Jensen, Jenny Lovisa Alexandra Muladal, Rune Christensen, Guttorm N. |
author_sort |
Dunlop, Katherine Mary |
title |
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
title_short |
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
title_full |
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
title_fullStr |
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
title_full_unstemmed |
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway |
title_sort |
evidence of energy and nutrient transfer from invasive pink salmon (oncorhynchus gorbuscha) spawners to juvenile atlantic salmon (salmo salar) and brown trout (salmo trutta) in northern norway |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2688653 https://doi.org/10.1111/eff.12582 |
long_lat |
ENVELOPE(13.158,13.158,65.618,65.618) |
geographic |
Norway Pacific Vesterelva |
geographic_facet |
Norway Pacific Vesterelva |
genre |
Atlantic salmon Northern Norway Oncorhynchus gorbuscha Pink salmon Salmo salar Subarctic |
genre_facet |
Atlantic salmon Northern Norway Oncorhynchus gorbuscha Pink salmon Salmo salar Subarctic |
op_source |
Ecology of Freshwater Fish |
op_relation |
Andre: FRAM - High North Research Centre for Climate and the Enviro urn:issn:0906-6691 https://hdl.handle.net/11250/2688653 https://doi.org/10.1111/eff.12582 cristin:1849015 |
op_doi |
https://doi.org/10.1111/eff.12582 |
container_title |
Ecology of Freshwater Fish |
container_volume |
30 |
container_issue |
2 |
container_start_page |
270 |
op_container_end_page |
283 |
_version_ |
1766362350789591040 |