Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation
The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:85360 2023-07-02T03:31:40+02:00 Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B. Berg, Ole Kristian Kent, Matthew P. Norum, Ine C. J. Hindar, Kjetil 2014-03-27T20:00:43.000+01:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-3l-uwh4 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:85360 unknown doi:10.5061/dryad.jk42p/1 doi:10.1002/ece3.1040 PMID:24967074 http://nbn-resolving.org/urn:nbn:nl:ui:13-3l-uwh4 doi:10.5061/dryad.jk42p https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:85360 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2014 ftdans https://doi.org/10.5061/dryad.jk42p/110.1002/ece3.104010.5061/dryad.jk42p 2023-06-13T13:12:25Z The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades has introduced movement barriers and changed more than 50% of the river habitat to lentic conditions. Based on microsatellites and SNPs, genetic variation within småblank was only about 50% of that in the anadromous Atlantic salmon within the same river. The genetic differentiation (FST) between småblank and the anadromous population was 0.24. This is similar to the differentiation between anadromous Atlantic salmon in Europe and North America. Microsatellite analyses identified three genetic subpopulations within småblank, each with an effective population size Ne of a few hundred individuals. There was no evidence of reduced heterozygosity and allelic richness in contemporary samples (2005–2008) compared with historical samples (1955–56 and 1978–79). However, there was a reduction in genetic differentiation between sampling localities over time. SNP data supported the differentiation of småblank into subpopulations and revealed downstream asymmetric gene flow between subpopulations. In spite of this, genetic variation was not higher in the lower than in the upper areas. The meta-population structure of småblank probably maintains genetic variation better than one panmictic population would do, as long as gene flow among subpopulations is maintained. Småblank is a unique endemic island population of Atlantic salmon. It is in a precarious situation due to a variety of anthropogenic impacts on its restricted habitat area. Thus, maintaining population size and avoiding further habitat fragmentation are important. Other/Unknown Material Atlantic salmon Salmo salar Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Norway |
institution |
Open Polar |
collection |
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B. Berg, Ole Kristian Kent, Matthew P. Norum, Ine C. J. Hindar, Kjetil Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
topic_facet |
Life sciences medicine and health care |
description |
The river-resident Salmo salar (“småblank”) has been isolated from other Atlantic salmon populations for 9,500 years in upper River Namsen, Norway. This is the only European Atlantic salmon population accomplishing its entire life cycle in a river. Hydropower development during the last six decades has introduced movement barriers and changed more than 50% of the river habitat to lentic conditions. Based on microsatellites and SNPs, genetic variation within småblank was only about 50% of that in the anadromous Atlantic salmon within the same river. The genetic differentiation (FST) between småblank and the anadromous population was 0.24. This is similar to the differentiation between anadromous Atlantic salmon in Europe and North America. Microsatellite analyses identified three genetic subpopulations within småblank, each with an effective population size Ne of a few hundred individuals. There was no evidence of reduced heterozygosity and allelic richness in contemporary samples (2005–2008) compared with historical samples (1955–56 and 1978–79). However, there was a reduction in genetic differentiation between sampling localities over time. SNP data supported the differentiation of småblank into subpopulations and revealed downstream asymmetric gene flow between subpopulations. In spite of this, genetic variation was not higher in the lower than in the upper areas. The meta-population structure of småblank probably maintains genetic variation better than one panmictic population would do, as long as gene flow among subpopulations is maintained. Småblank is a unique endemic island population of Atlantic salmon. It is in a precarious situation due to a variety of anthropogenic impacts on its restricted habitat area. Thus, maintaining population size and avoiding further habitat fragmentation are important. |
author |
Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B. Berg, Ole Kristian Kent, Matthew P. Norum, Ine C. J. Hindar, Kjetil |
author_facet |
Sandlund, Odd Terje Karlsson, Sten Thorstad, Eva B. Berg, Ole Kristian Kent, Matthew P. Norum, Ine C. J. Hindar, Kjetil |
author_sort |
Sandlund, Odd Terje |
title |
Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_short |
Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_full |
Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_fullStr |
Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_full_unstemmed |
Data from: Spatial and temporal genetic structure of a river-resident Atlantic salmon (Salmo salar) after millennia of isolation |
title_sort |
data from: spatial and temporal genetic structure of a river-resident atlantic salmon (salmo salar) after millennia of isolation |
publishDate |
2014 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-3l-uwh4 https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:85360 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
doi:10.5061/dryad.jk42p/1 doi:10.1002/ece3.1040 PMID:24967074 http://nbn-resolving.org/urn:nbn:nl:ui:13-3l-uwh4 doi:10.5061/dryad.jk42p https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:85360 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.jk42p/110.1002/ece3.104010.5061/dryad.jk42p |
_version_ |
1770271043660808192 |