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Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland
AIM: The Pleistocene glaciation event prompted the allopatric divergence of multiple glacial lineages of Arctic char (Salvelinus alpinus), some of which have come into secondary contact upon their recolonization of the Holarctic. While three glacial lineages (Arctic, Atlantic, and Acadian) are known...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392391/ https://www.ncbi.nlm.nih.gov/pubmed/30847090 http://dx.doi.org/10.1002/ece3.4893 |
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author | Salisbury, Sarah J. McCracken, Gregory R. Keefe, Donald Perry, Robert Ruzzante, Daniel E. |
author_facet | Salisbury, Sarah J. McCracken, Gregory R. Keefe, Donald Perry, Robert Ruzzante, Daniel E. |
author_sort | Salisbury, Sarah J. |
collection | PubMed |
description | AIM: The Pleistocene glaciation event prompted the allopatric divergence of multiple glacial lineages of Arctic char (Salvelinus alpinus), some of which have come into secondary contact upon their recolonization of the Holarctic. While three glacial lineages (Arctic, Atlantic, and Acadian) are known to have recolonized the western Atlantic, the degree of overlap of these three lineages is largely unknown. We sought to determine the distribution of these three glacial lineages in Labrador and Newfoundland at a fine spatial scale to assess their potential for introgression and their relative contribution to local fisheries. LOCATION: Labrador and Newfoundland, Canada. METHODS: We sequenced a portion of the D‐loop region in over 1,000 Arctic char (S. alpinus) samples from 67 locations across Labrador and Newfoundland. RESULTS: Within Labrador, the Arctic and Atlantic lineages were widespread. Two locations (one landlocked and one with access to the sea) also contained individuals of the Acadian lineage, constituting the first record of this lineage in Labrador. Atlantic and Acadian lineage individuals were found in both eastern and western Newfoundland. Multiple sampling locations in Labrador and Newfoundland contained fish of two or more different glacial lineages, implying their introgression. Glacial lineage did not appear to dictate contemporary genetic divergence between the pale and dark morph of char present in Gander Lake, Newfoundland. Both were predominately of the Atlantic lineage, suggesting the potential for their divergence in sympatry. MAIN CONCLUSIONS: Our study reveals Labrador and Newfoundland to be a unique junction of three glacial lineages which have likely hybridized extensively in this region. |
format | Online Article Text |
id | pubmed-6392391 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-63923912019-03-07 Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland Salisbury, Sarah J. McCracken, Gregory R. Keefe, Donald Perry, Robert Ruzzante, Daniel E. Ecol Evol Original Research AIM: The Pleistocene glaciation event prompted the allopatric divergence of multiple glacial lineages of Arctic char (Salvelinus alpinus), some of which have come into secondary contact upon their recolonization of the Holarctic. While three glacial lineages (Arctic, Atlantic, and Acadian) are known to have recolonized the western Atlantic, the degree of overlap of these three lineages is largely unknown. We sought to determine the distribution of these three glacial lineages in Labrador and Newfoundland at a fine spatial scale to assess their potential for introgression and their relative contribution to local fisheries. LOCATION: Labrador and Newfoundland, Canada. METHODS: We sequenced a portion of the D‐loop region in over 1,000 Arctic char (S. alpinus) samples from 67 locations across Labrador and Newfoundland. RESULTS: Within Labrador, the Arctic and Atlantic lineages were widespread. Two locations (one landlocked and one with access to the sea) also contained individuals of the Acadian lineage, constituting the first record of this lineage in Labrador. Atlantic and Acadian lineage individuals were found in both eastern and western Newfoundland. Multiple sampling locations in Labrador and Newfoundland contained fish of two or more different glacial lineages, implying their introgression. Glacial lineage did not appear to dictate contemporary genetic divergence between the pale and dark morph of char present in Gander Lake, Newfoundland. Both were predominately of the Atlantic lineage, suggesting the potential for their divergence in sympatry. MAIN CONCLUSIONS: Our study reveals Labrador and Newfoundland to be a unique junction of three glacial lineages which have likely hybridized extensively in this region. John Wiley and Sons Inc. 2019-01-28 /pmc/articles/PMC6392391/ /pubmed/30847090 http://dx.doi.org/10.1002/ece3.4893 Text en © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Salisbury, Sarah J. McCracken, Gregory R. Keefe, Donald Perry, Robert Ruzzante, Daniel E. Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title | Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title_full | Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title_fullStr | Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title_full_unstemmed | Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title_short | Extensive secondary contact among three glacial lineages of Arctic Char (Salvelinus alpinus) in Labrador and Newfoundland |
title_sort | extensive secondary contact among three glacial lineages of arctic char (salvelinus alpinus) in labrador and newfoundland |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6392391/ https://www.ncbi.nlm.nih.gov/pubmed/30847090 http://dx.doi.org/10.1002/ece3.4893 |
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