Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake
Range expansion in north-temperate fishes subsequent to the retreat of the Wisconsinan glaciers has resulted in the rapid colonization of previously unexploited, heterogeneous habitats and, in many situations, secondary contact among conspecific lineages that were once previously isolated. Such ecol...
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ftdryad:oai:v1.datadryad.org:10255/dryad.67908 2023-05-15T15:33:15+02:00 Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake Harris, Les N. Chavarie, Louise Bajno, Robert Howland, Kimberly L. Wiley, Simon H. Tonn, William M. Taylor, Eric B. Great Bear Lake Great Slave Lake Peter Lake Sandy Lake Jayco Lake Atlin Lake Nakinlerak Lake Lake Nipigon 2002-2010 2014-07-18T14:22:17Z http://hdl.handle.net/10255/dryad.67908 https://doi.org/10.5061/dryad.1368p unknown doi:10.5061/dryad.1368p/1 doi:10.1038/hdy.2014.74 PMID:25204304 doi:10.5061/dryad.1368p Harris LN, Chavarie L, Bajno R, Howland KL, Wiley SH, Tonn WM, Taylor EB (2015) Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake. Heredity 114(1): 94-106. http://hdl.handle.net/10255/dryad.67908 post-glacial dispersal lake trout morphotypes sympatric allopatric Article 2014 ftdryad https://doi.org/10.5061/dryad.1368p https://doi.org/10.5061/dryad.1368p/1 https://doi.org/10.1038/hdy.2014.74 2020-01-01T15:10:18Z Range expansion in north-temperate fishes subsequent to the retreat of the Wisconsinan glaciers has resulted in the rapid colonization of previously unexploited, heterogeneous habitats and, in many situations, secondary contact among conspecific lineages that were once previously isolated. Such ecological opportunity coupled with reduced competition likely promoted morphological and genetic differentiation within and among post-glacial fish populations. Discrete morphological forms existing in sympatry, for example, have now been described in many species, yet few studies have directly assessed the association between morphological and genetic variation. Morphotypes of Lake Trout, Salvelinus namaycush, are found in several large-lake systems including Great Bear Lake (GBL), Northwest Territories, Canada, where several shallow-water forms are known. Here, we assess microsatellite and mitochondrial DNA variation among four morphotypes of Lake Trout from the five distinct arms of GBL, and also from locations outside of this system to evaluate several hypotheses concerning the evolution of morphological variation in this species. Our data indicate that morphotypes of Lake Trout from GBL are genetically differentiated from one another, yet the morphotypes are still genetically more similar to one another compared with populations from outside of this system. Furthermore, our data suggest that Lake Trout colonized GBL following dispersal from a single glacial refugium (the Mississippian) and support an intra-lake model of divergence. Overall, our study provides insights into the origins of morphological and genetic variation in post-glacial populations of fishes and provides benchmarks important for monitoring Lake Trout biodiversity in a region thought to be disproportionately susceptible to impacts from climate change. Article in Journal/Newspaper Atlin Lake glacier* Great Bear Lake Great Slave Lake Northwest Territories Dryad Digital Repository (Duke University) Atlin ENVELOPE(-133.689,-133.689,59.578,59.578) Atlin Lake ENVELOPE(-133.722,-133.722,59.532,59.532) Canada Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) Great Slave Lake ENVELOPE(-114.001,-114.001,61.500,61.500) Northwest Territories |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
post-glacial dispersal lake trout morphotypes sympatric allopatric |
spellingShingle |
post-glacial dispersal lake trout morphotypes sympatric allopatric Harris, Les N. Chavarie, Louise Bajno, Robert Howland, Kimberly L. Wiley, Simon H. Tonn, William M. Taylor, Eric B. Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
topic_facet |
post-glacial dispersal lake trout morphotypes sympatric allopatric |
description |
Range expansion in north-temperate fishes subsequent to the retreat of the Wisconsinan glaciers has resulted in the rapid colonization of previously unexploited, heterogeneous habitats and, in many situations, secondary contact among conspecific lineages that were once previously isolated. Such ecological opportunity coupled with reduced competition likely promoted morphological and genetic differentiation within and among post-glacial fish populations. Discrete morphological forms existing in sympatry, for example, have now been described in many species, yet few studies have directly assessed the association between morphological and genetic variation. Morphotypes of Lake Trout, Salvelinus namaycush, are found in several large-lake systems including Great Bear Lake (GBL), Northwest Territories, Canada, where several shallow-water forms are known. Here, we assess microsatellite and mitochondrial DNA variation among four morphotypes of Lake Trout from the five distinct arms of GBL, and also from locations outside of this system to evaluate several hypotheses concerning the evolution of morphological variation in this species. Our data indicate that morphotypes of Lake Trout from GBL are genetically differentiated from one another, yet the morphotypes are still genetically more similar to one another compared with populations from outside of this system. Furthermore, our data suggest that Lake Trout colonized GBL following dispersal from a single glacial refugium (the Mississippian) and support an intra-lake model of divergence. Overall, our study provides insights into the origins of morphological and genetic variation in post-glacial populations of fishes and provides benchmarks important for monitoring Lake Trout biodiversity in a region thought to be disproportionately susceptible to impacts from climate change. |
format |
Article in Journal/Newspaper |
author |
Harris, Les N. Chavarie, Louise Bajno, Robert Howland, Kimberly L. Wiley, Simon H. Tonn, William M. Taylor, Eric B. |
author_facet |
Harris, Les N. Chavarie, Louise Bajno, Robert Howland, Kimberly L. Wiley, Simon H. Tonn, William M. Taylor, Eric B. |
author_sort |
Harris, Les N. |
title |
Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
title_short |
Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
title_full |
Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
title_fullStr |
Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
title_full_unstemmed |
Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake |
title_sort |
data from: evolution and origin of sympatric shallow-water morphotypes of lake trout, salvelinus namaycush, in canada's great bear lake |
publishDate |
2014 |
url |
http://hdl.handle.net/10255/dryad.67908 https://doi.org/10.5061/dryad.1368p |
op_coverage |
Great Bear Lake Great Slave Lake Peter Lake Sandy Lake Jayco Lake Atlin Lake Nakinlerak Lake Lake Nipigon 2002-2010 |
long_lat |
ENVELOPE(-133.689,-133.689,59.578,59.578) ENVELOPE(-133.722,-133.722,59.532,59.532) ENVELOPE(-120.753,-120.753,65.834,65.834) ENVELOPE(-114.001,-114.001,61.500,61.500) |
geographic |
Atlin Atlin Lake Canada Great Bear Lake Great Slave Lake Northwest Territories |
geographic_facet |
Atlin Atlin Lake Canada Great Bear Lake Great Slave Lake Northwest Territories |
genre |
Atlin Lake glacier* Great Bear Lake Great Slave Lake Northwest Territories |
genre_facet |
Atlin Lake glacier* Great Bear Lake Great Slave Lake Northwest Territories |
op_relation |
doi:10.5061/dryad.1368p/1 doi:10.1038/hdy.2014.74 PMID:25204304 doi:10.5061/dryad.1368p Harris LN, Chavarie L, Bajno R, Howland KL, Wiley SH, Tonn WM, Taylor EB (2015) Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake. Heredity 114(1): 94-106. http://hdl.handle.net/10255/dryad.67908 |
op_doi |
https://doi.org/10.5061/dryad.1368p https://doi.org/10.5061/dryad.1368p/1 https://doi.org/10.1038/hdy.2014.74 |
_version_ |
1766363714484699136 |