Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population
Abstract Maintaining standing genetic variation is a challenge in human-dominated landscapes. We used genetic (i.e., 16 short tandem repeats) and morphological (i.e., length and weight) measurements of 593 contemporary and historical brown trout ( Salmo trutta ) samples to study fine-scale and short...
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2021
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Online Access: | http://dx.doi.org/10.1038/s41598-021-96681-1 https://www.nature.com/articles/s41598-021-96681-1.pdf https://www.nature.com/articles/s41598-021-96681-1 |
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crspringernat:10.1038/s41598-021-96681-1 2023-05-15T17:54:41+02:00 Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population Klütsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Beddari, Benedicte Gjelland, Karl Øystein Aspholm, Paul Eric Amundsen, Per-Arne Hagen, Snorre B. Norwegian Ministry of Climate and Environment Norwegian Environment Agency 2021 http://dx.doi.org/10.1038/s41598-021-96681-1 https://www.nature.com/articles/s41598-021-96681-1.pdf https://www.nature.com/articles/s41598-021-96681-1 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Scientific Reports volume 11, issue 1 ISSN 2045-2322 Multidisciplinary journal-article 2021 crspringernat https://doi.org/10.1038/s41598-021-96681-1 2022-01-04T10:49:33Z Abstract Maintaining standing genetic variation is a challenge in human-dominated landscapes. We used genetic (i.e., 16 short tandem repeats) and morphological (i.e., length and weight) measurements of 593 contemporary and historical brown trout ( Salmo trutta ) samples to study fine-scale and short-term impacts of different management practices. These had changed from traditional breeding practices, using the same broodstock for several years, to modern breeding practices, including annual broodstock replacement, in the transnational subarctic Pasvik River. Using population genetic structure analyses (i.e., Bayesian assignment tests, DAPCs, and PCAs), four historical genetic clusters (E2001A-D), likely representing family lineages resulting from different crosses, were found in zone E. These groups were characterized by consistently lower genetic diversity, higher within-group relatedness, lower effective population size, and significantly smaller body size than contemporary stocked (E2001E) and wild fish (E2001F). However, even current breeding practices are insufficient to prevent genetic diversity loss and morphological changes as demonstrated by on average smaller body sizes and recent genetic bottleneck signatures in the modern breeding stock compared to wild fish. Conservation management must evaluate breeding protocols for stocking programs and assess if these can preserve remaining natural genetic diversity and morphology in brown trout for long-term preservation of freshwater fauna. Article in Journal/Newspaper Pasvik Subarctic Springer Nature (via Crossref) Pasvik ENVELOPE(30.580,30.580,69.810,69.810) Scientific Reports 11 1 |
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Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Klütsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Beddari, Benedicte Gjelland, Karl Øystein Aspholm, Paul Eric Amundsen, Per-Arne Hagen, Snorre B. Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
topic_facet |
Multidisciplinary |
description |
Abstract Maintaining standing genetic variation is a challenge in human-dominated landscapes. We used genetic (i.e., 16 short tandem repeats) and morphological (i.e., length and weight) measurements of 593 contemporary and historical brown trout ( Salmo trutta ) samples to study fine-scale and short-term impacts of different management practices. These had changed from traditional breeding practices, using the same broodstock for several years, to modern breeding practices, including annual broodstock replacement, in the transnational subarctic Pasvik River. Using population genetic structure analyses (i.e., Bayesian assignment tests, DAPCs, and PCAs), four historical genetic clusters (E2001A-D), likely representing family lineages resulting from different crosses, were found in zone E. These groups were characterized by consistently lower genetic diversity, higher within-group relatedness, lower effective population size, and significantly smaller body size than contemporary stocked (E2001E) and wild fish (E2001F). However, even current breeding practices are insufficient to prevent genetic diversity loss and morphological changes as demonstrated by on average smaller body sizes and recent genetic bottleneck signatures in the modern breeding stock compared to wild fish. Conservation management must evaluate breeding protocols for stocking programs and assess if these can preserve remaining natural genetic diversity and morphology in brown trout for long-term preservation of freshwater fauna. |
author2 |
Norwegian Ministry of Climate and Environment Norwegian Environment Agency |
format |
Article in Journal/Newspaper |
author |
Klütsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Beddari, Benedicte Gjelland, Karl Øystein Aspholm, Paul Eric Amundsen, Per-Arne Hagen, Snorre B. |
author_facet |
Klütsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Beddari, Benedicte Gjelland, Karl Øystein Aspholm, Paul Eric Amundsen, Per-Arne Hagen, Snorre B. |
author_sort |
Klütsch, Cornelya F. C. |
title |
Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
title_short |
Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
title_full |
Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
title_fullStr |
Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
title_full_unstemmed |
Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
title_sort |
temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41598-021-96681-1 https://www.nature.com/articles/s41598-021-96681-1.pdf https://www.nature.com/articles/s41598-021-96681-1 |
long_lat |
ENVELOPE(30.580,30.580,69.810,69.810) |
geographic |
Pasvik |
geographic_facet |
Pasvik |
genre |
Pasvik Subarctic |
genre_facet |
Pasvik Subarctic |
op_source |
Scientific Reports volume 11, issue 1 ISSN 2045-2322 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-96681-1 |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
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1766162477915045888 |