Data from: Evolution and origin of sympatric shallow-water morphotypes of Lake Trout, Salvelinus namaycush, in Canada's Great Bear Lake
AbstractRange 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. S...
Main Authors: | , , , , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
Scholars Portal Dataverse
2021
|
Subjects: | |
Online Access: | https://dx.doi.org/10.5683/sp2/51ymer https://dataverse.scholarsportal.info/citation?persistentId=doi:10.5683/SP2/51YMER |
id |
ftdatacite:10.5683/sp2/51ymer |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.5683/sp2/51ymer 2023-05-15T16:22:28+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. 2021 https://dx.doi.org/10.5683/sp2/51ymer https://dataverse.scholarsportal.info/citation?persistentId=doi:10.5683/SP2/51YMER unknown Scholars Portal Dataverse dataset Dataset 2021 ftdatacite https://doi.org/10.5683/sp2/51ymer 2021-11-05T12:55:41Z AbstractRange 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. Dataset glacier* Great Bear Lake Northwest Territories DataCite Metadata Store (German National Library of Science and Technology) Canada Great Bear Lake ENVELOPE(-120.753,-120.753,65.834,65.834) Northwest Territories |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
description |
AbstractRange 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 |
Dataset |
author |
Harris, Les N. Chavarie, Louise Bajno, Robert Howland, Kimberly L. Wiley, Simon H. Tonn, William M. Taylor, Eric B. |
spellingShingle |
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 |
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 |
publisher |
Scholars Portal Dataverse |
publishDate |
2021 |
url |
https://dx.doi.org/10.5683/sp2/51ymer https://dataverse.scholarsportal.info/citation?persistentId=doi:10.5683/SP2/51YMER |
long_lat |
ENVELOPE(-120.753,-120.753,65.834,65.834) |
geographic |
Canada Great Bear Lake Northwest Territories |
geographic_facet |
Canada Great Bear Lake Northwest Territories |
genre |
glacier* Great Bear Lake Northwest Territories |
genre_facet |
glacier* Great Bear Lake Northwest Territories |
op_doi |
https://doi.org/10.5683/sp2/51ymer |
_version_ |
1766010455988371456 |