Temporal analysis shows relaxed genetic erosion following improved stocking practices in a subarctic transnational brown trout population
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 impac...
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ftpubmed:oai:pubmedcentral.nih.gov:8405680 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. 2021-08-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8405680/ http://www.ncbi.nlm.nih.gov/pubmed/34462480 https://doi.org/10.1038/s41598-021-96681-1 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8405680/ http://www.ncbi.nlm.nih.gov/pubmed/34462480 http://dx.doi.org/10.1038/s41598-021-96681-1 © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Sci Rep Article Text 2021 ftpubmed https://doi.org/10.1038/s41598-021-96681-1 2021-09-05T01:08:25Z 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. Text Pasvik Subarctic PubMed Central (PMC) Pasvik ENVELOPE(30.580,30.580,69.810,69.810) Scientific Reports 11 1 |
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Article 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 |
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Article |
description |
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. |
format |
Text |
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 |
Nature Publishing Group UK |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8405680/ http://www.ncbi.nlm.nih.gov/pubmed/34462480 https://doi.org/10.1038/s41598-021-96681-1 |
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ENVELOPE(30.580,30.580,69.810,69.810) |
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Pasvik |
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Pasvik |
genre |
Pasvik Subarctic |
genre_facet |
Pasvik Subarctic |
op_source |
Sci Rep |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8405680/ http://www.ncbi.nlm.nih.gov/pubmed/34462480 http://dx.doi.org/10.1038/s41598-021-96681-1 |
op_rights |
© The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://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 |
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Scientific Reports |
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11 |
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