Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system
Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying an...
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Dryad
2019
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Online Access: | https://doi.org/10.5061/dryad.45482t5 |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::01000073eb9170cf1d9f4fbd9c93ae10 2023-05-15T17:54:41+02:00 Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. 2019-01-01 https://doi.org/10.5061/dryad.45482t5 en eng Dryad http://dx.doi.org/10.5061/dryad.45482t5 https://dx.doi.org/10.5061/dryad.45482t5 lic_creative-commons 10.5061/dryad.45482t5 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:126679 oai:easy.dans.knaw.nl:easy-dataset:126679 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 re3data_____::r3d100000044 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c Salmo trutta genetic erosion fish stocking Genetic integrity habitat fragmentation Life sciences medicine and health care genetic diversity anthro-se envir Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2019 fttriple https://doi.org/10.5061/dryad.45482t5 2023-01-22T17:22:39Z Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying anthropogenic influences on genetic integrity, as it has experienced significant genetic alterations throughout its natural distribution range due to habitat fragmentation, overexploitation, translocations, and stocking. The Pasvik River is a subarctic riverine system shared between Norway, Russia and Finland, subdivided by seven hydroelectric power dams that destroyed about 70% of natural spawning and nursing areas. Stocking is applied in certain river parts to support the natural brown trout population. Adjacent river segments with different management strategies (stocked versus not stocked) facilitated the simultaneous assessment of genetic impacts of dams and stocking based on analyses of 16 short tandem repeat loci. Dams were expected to increase genetic differentiation between and reduce genetic diversity within river sections. Contrastingly, stocking was predicted to promote genetic homogenization and diversity, but also potentially lead to loss of private alleles and to genetic erosion. Our results showed comparatively low heterozygosity and clear genetic differentiation between adjacent sections in non-stocked river parts, indicating that dams prevent migration and contribute to genetic isolation and loss of genetic diversity. Furthermore, genetic differentiation was low and heterozygosity relatively high across stocked sections. However, in stocked river sections, we found signatures of recent bottlenecks and reductions in private alleles, indicating that only a subset of individuals contribute to reproduction, potentially leading to divergence away from the natural genetic state. Taken together, these results indicate that stocking counteracts the negative fragmentation effects of dams, but also that stocking ... Dataset Pasvik Subarctic Unknown Norway Pasvik ENVELOPE(30.580,30.580,69.810,69.810) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Salmo trutta genetic erosion fish stocking Genetic integrity habitat fragmentation Life sciences medicine and health care genetic diversity anthro-se envir |
spellingShingle |
Salmo trutta genetic erosion fish stocking Genetic integrity habitat fragmentation Life sciences medicine and health care genetic diversity anthro-se envir Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
topic_facet |
Salmo trutta genetic erosion fish stocking Genetic integrity habitat fragmentation Life sciences medicine and health care genetic diversity anthro-se envir |
description |
Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying anthropogenic influences on genetic integrity, as it has experienced significant genetic alterations throughout its natural distribution range due to habitat fragmentation, overexploitation, translocations, and stocking. The Pasvik River is a subarctic riverine system shared between Norway, Russia and Finland, subdivided by seven hydroelectric power dams that destroyed about 70% of natural spawning and nursing areas. Stocking is applied in certain river parts to support the natural brown trout population. Adjacent river segments with different management strategies (stocked versus not stocked) facilitated the simultaneous assessment of genetic impacts of dams and stocking based on analyses of 16 short tandem repeat loci. Dams were expected to increase genetic differentiation between and reduce genetic diversity within river sections. Contrastingly, stocking was predicted to promote genetic homogenization and diversity, but also potentially lead to loss of private alleles and to genetic erosion. Our results showed comparatively low heterozygosity and clear genetic differentiation between adjacent sections in non-stocked river parts, indicating that dams prevent migration and contribute to genetic isolation and loss of genetic diversity. Furthermore, genetic differentiation was low and heterozygosity relatively high across stocked sections. However, in stocked river sections, we found signatures of recent bottlenecks and reductions in private alleles, indicating that only a subset of individuals contribute to reproduction, potentially leading to divergence away from the natural genetic state. Taken together, these results indicate that stocking counteracts the negative fragmentation effects of dams, but also that stocking ... |
format |
Dataset |
author |
Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. |
author_facet |
Klutsch, Cornelya F. C. Maduna, Simo N. Polikarpova, Natalia Forfang, Kristin Aspholm, Paul Eric Nyman, Tommi Eiken, Hans Geir Amundsen, Per-Arne Hagen, Snorre B. |
author_sort |
Klutsch, Cornelya F. C. |
title |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_short |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_full |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_fullStr |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_full_unstemmed |
Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
title_sort |
data from: genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system |
publisher |
Dryad |
publishDate |
2019 |
url |
https://doi.org/10.5061/dryad.45482t5 |
long_lat |
ENVELOPE(30.580,30.580,69.810,69.810) |
geographic |
Norway Pasvik |
geographic_facet |
Norway Pasvik |
genre |
Pasvik Subarctic |
genre_facet |
Pasvik Subarctic |
op_source |
10.5061/dryad.45482t5 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:126679 oai:easy.dans.knaw.nl:easy-dataset:126679 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 re3data_____::r3d100000044 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c |
op_relation |
http://dx.doi.org/10.5061/dryad.45482t5 https://dx.doi.org/10.5061/dryad.45482t5 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.45482t5 |
_version_ |
1766162481421484032 |