A genetic comparison of sympatric anadromous and resident Atlantic salmon
Abstract Many studies have identified the importance of local adaptation in Atlantic salmon ( Salmo salar ) and the strong genetic differences that exist between allopatric or parapatric resident and anadromous populations. However, as truly sympatric migratory phenotypes of Atlantic salmon have not...
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crwiley:10.1111/eff.12211 2024-09-15T17:55:55+00:00 A genetic comparison of sympatric anadromous and resident Atlantic salmon Adams, Blair K. Cote, David Hutchings, Jeffrey A. Natural Sciences and Engineering Research Council of Canada Dental Foundation of Oregon 2014 http://dx.doi.org/10.1111/eff.12211 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12211 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12211 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 25, issue 2, page 307-317 ISSN 0906-6691 1600-0633 journal-article 2014 crwiley https://doi.org/10.1111/eff.12211 2024-07-02T04:12:33Z Abstract Many studies have identified the importance of local adaptation in Atlantic salmon ( Salmo salar ) and the strong genetic differences that exist between allopatric or parapatric resident and anadromous populations. However, as truly sympatric migratory phenotypes of Atlantic salmon have not been studied, it remains unclear whether distinct genotypes previously associated with life history differences are maintained through reproductive isolation and subsequent genetic drift or through natural selection induced by different life history requirements. In this study, sympatric anadromous and resident Atlantic salmon were sampled from three Newfoundland (Canada) watersheds to evaluate the genetic divergence of these life history forms. Eight microsatellite loci were used to quantify genetic variation within and among populations. Metrics of genetic differentiation (exact tests for population differentiation, pairwise θ values) provide no evidence of genetic differentiation between some sympatric anadromous and resident phenotypes within a system with no history of segregation. In the remaining two watersheds, the observed differentiation appears to be a consequence of historical segregation rather than life history form. Nonetheless, these differences have been maintained in contemporary times for several generations. At broader spatial scales, resident salmon were more genetically divergent from one another than anadromous life history forms and were more closely related to anadromous salmon from within their watershed than to resident salmon from other watersheds. The study indicates that both life history forms can be maintained within a single population, but that sympatric populations of different life histories can maintain genetic differences for at least several generations after being reconnected. Article in Journal/Newspaper Atlantic salmon Newfoundland Salmo salar Wiley Online Library Ecology of Freshwater Fish 25 2 307 317 |
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English |
description |
Abstract Many studies have identified the importance of local adaptation in Atlantic salmon ( Salmo salar ) and the strong genetic differences that exist between allopatric or parapatric resident and anadromous populations. However, as truly sympatric migratory phenotypes of Atlantic salmon have not been studied, it remains unclear whether distinct genotypes previously associated with life history differences are maintained through reproductive isolation and subsequent genetic drift or through natural selection induced by different life history requirements. In this study, sympatric anadromous and resident Atlantic salmon were sampled from three Newfoundland (Canada) watersheds to evaluate the genetic divergence of these life history forms. Eight microsatellite loci were used to quantify genetic variation within and among populations. Metrics of genetic differentiation (exact tests for population differentiation, pairwise θ values) provide no evidence of genetic differentiation between some sympatric anadromous and resident phenotypes within a system with no history of segregation. In the remaining two watersheds, the observed differentiation appears to be a consequence of historical segregation rather than life history form. Nonetheless, these differences have been maintained in contemporary times for several generations. At broader spatial scales, resident salmon were more genetically divergent from one another than anadromous life history forms and were more closely related to anadromous salmon from within their watershed than to resident salmon from other watersheds. The study indicates that both life history forms can be maintained within a single population, but that sympatric populations of different life histories can maintain genetic differences for at least several generations after being reconnected. |
author2 |
Natural Sciences and Engineering Research Council of Canada Dental Foundation of Oregon |
format |
Article in Journal/Newspaper |
author |
Adams, Blair K. Cote, David Hutchings, Jeffrey A. |
spellingShingle |
Adams, Blair K. Cote, David Hutchings, Jeffrey A. A genetic comparison of sympatric anadromous and resident Atlantic salmon |
author_facet |
Adams, Blair K. Cote, David Hutchings, Jeffrey A. |
author_sort |
Adams, Blair K. |
title |
A genetic comparison of sympatric anadromous and resident Atlantic salmon |
title_short |
A genetic comparison of sympatric anadromous and resident Atlantic salmon |
title_full |
A genetic comparison of sympatric anadromous and resident Atlantic salmon |
title_fullStr |
A genetic comparison of sympatric anadromous and resident Atlantic salmon |
title_full_unstemmed |
A genetic comparison of sympatric anadromous and resident Atlantic salmon |
title_sort |
genetic comparison of sympatric anadromous and resident atlantic salmon |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/eff.12211 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12211 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12211 |
genre |
Atlantic salmon Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Newfoundland Salmo salar |
op_source |
Ecology of Freshwater Fish volume 25, issue 2, page 307-317 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12211 |
container_title |
Ecology of Freshwater Fish |
container_volume |
25 |
container_issue |
2 |
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307 |
op_container_end_page |
317 |
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1810432136185905152 |