Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns?
This study of 193 boreal lakes of northern Sweden suggests a long-term detrimental impact of introduced brook trout (Salvelinus fontinalis) on brown trout (Salmo trutta) populations. Thirteen of 65 (20%) brown trout populations in lakes exposed to brook trout went extinct, whereas the extinction rat...
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crcansciencepubl:10.1139/f07-040 2023-12-17T10:47:32+01:00 Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? Spens, Johan Alanärä, Anders Eriksson, Lars-Ove 2007 http://dx.doi.org/10.1139/f07-040 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-040 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 4, page 654-664 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crcansciencepubl https://doi.org/10.1139/f07-040 2023-11-19T13:39:36Z This study of 193 boreal lakes of northern Sweden suggests a long-term detrimental impact of introduced brook trout (Salvelinus fontinalis) on brown trout (Salmo trutta) populations. Thirteen of 65 (20%) brown trout populations in lakes exposed to brook trout went extinct, whereas the extinction rate in unexposed lakes was significantly lower (2%). We verified other studies that indicate that altitude strongly affects the distribution of the two species; brown trout populations in our higher altitude lakes were more sensitive to impact from brook trout. In 28 lakes above 285 m, 12 trout populations exposed to brook trout went extinct, while only one population became extinct in 37 lakes below 285 m. No effects of other environmental factors were detected (e.g., water chemistry, stocking of rainbow trout (Oncorhynchus mykiss), fish species community assembly, migration barriers, or lake morphometry on brown trout extinction). The time lag between the first record of brook trout introduction and subsequent extinction of brown trout was two decades on average (maximum 70 years). Even though further stocking of brook trout has been stopped, our analysis suggest that existing sympatric populations may continue to pose an extinction threat to brown trout. Article in Journal/Newspaper Northern Sweden Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 64 4 654 664 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
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English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Spens, Johan Alanärä, Anders Eriksson, Lars-Ove Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
This study of 193 boreal lakes of northern Sweden suggests a long-term detrimental impact of introduced brook trout (Salvelinus fontinalis) on brown trout (Salmo trutta) populations. Thirteen of 65 (20%) brown trout populations in lakes exposed to brook trout went extinct, whereas the extinction rate in unexposed lakes was significantly lower (2%). We verified other studies that indicate that altitude strongly affects the distribution of the two species; brown trout populations in our higher altitude lakes were more sensitive to impact from brook trout. In 28 lakes above 285 m, 12 trout populations exposed to brook trout went extinct, while only one population became extinct in 37 lakes below 285 m. No effects of other environmental factors were detected (e.g., water chemistry, stocking of rainbow trout (Oncorhynchus mykiss), fish species community assembly, migration barriers, or lake morphometry on brown trout extinction). The time lag between the first record of brook trout introduction and subsequent extinction of brown trout was two decades on average (maximum 70 years). Even though further stocking of brook trout has been stopped, our analysis suggest that existing sympatric populations may continue to pose an extinction threat to brown trout. |
format |
Article in Journal/Newspaper |
author |
Spens, Johan Alanärä, Anders Eriksson, Lars-Ove |
author_facet |
Spens, Johan Alanärä, Anders Eriksson, Lars-Ove |
author_sort |
Spens, Johan |
title |
Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
title_short |
Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
title_full |
Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
title_fullStr |
Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
title_full_unstemmed |
Nonnative brook trout ( Salvelinus fontinalis ) and the demise of native brown trout ( Salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
title_sort |
nonnative brook trout ( salvelinus fontinalis ) and the demise of native brown trout ( salmo trutta ) in northern boreal lakes: stealthy, long-term patterns? |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f07-040 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-040 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 4, page 654-664 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f07-040 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
64 |
container_issue |
4 |
container_start_page |
654 |
op_container_end_page |
664 |
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1785571425816412160 |