Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation
Census population size (Nc) is crucial to the development of resource management strategies, however, monitoring the effective population size (Ne) of managed populations has proliferated because of this parameter’s relationship to the short-term impacts of genetic stochasticity and long-term popula...
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ftdryad:oai:v1.datadryad.org:10255/dryad.132081 2023-05-15T14:27:14+02:00 Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation Harris, Les N. Palstra, Friso P. Bajno, Rob Gallagher, Colin P. Howland, Kimberly L. Taylor, Eric B. Reist, James D. Yukon Northslope Firth River YK Babbage River YK Big Fish River NT Rat River NT 1980s-present 2016-12-06T21:34:32Z http://hdl.handle.net/10255/dryad.132081 https://doi.org/10.5061/dryad.6nd54 unknown doi:10.5061/dryad.6nd54/1 doi:10.1007/s10592-016-0915-5 doi:10.5061/dryad.6nd54 Harris LN, Palstra FP, Bajno R, Gallagher CP, Howland KL, Taylor EB, Reist JD (2016) Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation. Conservation Genetics 18(2): 393-410. 1566-0621 http://hdl.handle.net/10255/dryad.132081 Effective population size Census population size Northern Dolly Varden Approximate Bayesian computation Conservation Article 2016 ftdryad https://doi.org/10.5061/dryad.6nd54 https://doi.org/10.5061/dryad.6nd54/1 https://doi.org/10.1007/s10592-016-0915-5 2020-01-01T15:43:36Z Census population size (Nc) is crucial to the development of resource management strategies, however, monitoring the effective population size (Ne) of managed populations has proliferated because of this parameter’s relationship to the short-term impacts of genetic stochasticity and long-term population viability. Thus, having a sound understanding of both Nc and Ne, including population connectivity, provides valuable insights into both the demographic and genetic risks to extinction. Here, we assessed microsatellite DNA variation in four (of five known) anadromous northern Dolly Varden (NDV, Salvelinus malma malma) populations from Canada’s western Arctic region, to estimate Ne using both temporal-based and single-sample estimators and to test for associations between Ne and Nc. We also employed approximate Bayesian computation (ABC) to evaluate several evolutionary scenarios that have potentially shaped contemporary population structure in this species, focusing particularly on population size and connectivity. We found evidence for moderate to large contemporary and historical Ne, suggesting that short- and long-term extinction risks are low for these populations. Estimates of contemporary and long-term Ne were variable within and among populations and overall estimates could not be reliably linked with Nc or available spawning habitat. The overall estimate of Ne/Nc, was 0.152 and ranged from 0.024 to 0.442 when including errors around the estimate of Ne and Nc. Finally, ABC analyses suggest that NDV had a common origin followed by divergence in isolation while maintaining large effective sizes, but also that these populations were bottlenecked in the past, likely the result of post-glacial colonization processes. These results corroborate indications of limited gene flow at present, indicating independent demographic and evolutionary trajectories that imply NDV is best managed on a per-river-population basis. Overall, the results of this study further our general understanding of Ne, Ne/Nc and demographic independence in NDV, and provide a comprehensive and quantitative assessment of the potential genetic and demographic risk status of Arctic anadromous salmonids, including baselines for future monitoring. Article in Journal/Newspaper Arctic Arctic Yukon Dryad Digital Repository (Duke University) Arctic Yukon Varden ENVELOPE(7.656,7.656,62.534,62.534) Firth River ENVELOPE(-139.508,-139.508,69.542,69.542) Babbage River ENVELOPE(-138.455,-138.455,69.233,69.233) Rat River ENVELOPE(-136.459,-136.459,67.775,67.775) Big Fish River ENVELOPE(-136.455,-136.455,68.500,68.500) |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Effective population size Census population size Northern Dolly Varden Approximate Bayesian computation Conservation |
spellingShingle |
Effective population size Census population size Northern Dolly Varden Approximate Bayesian computation Conservation Harris, Les N. Palstra, Friso P. Bajno, Rob Gallagher, Colin P. Howland, Kimberly L. Taylor, Eric B. Reist, James D. Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
topic_facet |
Effective population size Census population size Northern Dolly Varden Approximate Bayesian computation Conservation |
description |
Census population size (Nc) is crucial to the development of resource management strategies, however, monitoring the effective population size (Ne) of managed populations has proliferated because of this parameter’s relationship to the short-term impacts of genetic stochasticity and long-term population viability. Thus, having a sound understanding of both Nc and Ne, including population connectivity, provides valuable insights into both the demographic and genetic risks to extinction. Here, we assessed microsatellite DNA variation in four (of five known) anadromous northern Dolly Varden (NDV, Salvelinus malma malma) populations from Canada’s western Arctic region, to estimate Ne using both temporal-based and single-sample estimators and to test for associations between Ne and Nc. We also employed approximate Bayesian computation (ABC) to evaluate several evolutionary scenarios that have potentially shaped contemporary population structure in this species, focusing particularly on population size and connectivity. We found evidence for moderate to large contemporary and historical Ne, suggesting that short- and long-term extinction risks are low for these populations. Estimates of contemporary and long-term Ne were variable within and among populations and overall estimates could not be reliably linked with Nc or available spawning habitat. The overall estimate of Ne/Nc, was 0.152 and ranged from 0.024 to 0.442 when including errors around the estimate of Ne and Nc. Finally, ABC analyses suggest that NDV had a common origin followed by divergence in isolation while maintaining large effective sizes, but also that these populations were bottlenecked in the past, likely the result of post-glacial colonization processes. These results corroborate indications of limited gene flow at present, indicating independent demographic and evolutionary trajectories that imply NDV is best managed on a per-river-population basis. Overall, the results of this study further our general understanding of Ne, Ne/Nc and demographic independence in NDV, and provide a comprehensive and quantitative assessment of the potential genetic and demographic risk status of Arctic anadromous salmonids, including baselines for future monitoring. |
format |
Article in Journal/Newspaper |
author |
Harris, Les N. Palstra, Friso P. Bajno, Rob Gallagher, Colin P. Howland, Kimberly L. Taylor, Eric B. Reist, James D. |
author_facet |
Harris, Les N. Palstra, Friso P. Bajno, Rob Gallagher, Colin P. Howland, Kimberly L. Taylor, Eric B. Reist, James D. |
author_sort |
Harris, Les N. |
title |
Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
title_short |
Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
title_full |
Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
title_fullStr |
Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
title_full_unstemmed |
Data from: Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation |
title_sort |
data from: assessing conservation risks to populations of an anadromous arctic salmonid, the northern dolly varden (salvelinus malma malma), via estimates of effective and census population sizes and approximate bayesian computation |
publishDate |
2016 |
url |
http://hdl.handle.net/10255/dryad.132081 https://doi.org/10.5061/dryad.6nd54 |
op_coverage |
Yukon Northslope Firth River YK Babbage River YK Big Fish River NT Rat River NT 1980s-present |
long_lat |
ENVELOPE(7.656,7.656,62.534,62.534) ENVELOPE(-139.508,-139.508,69.542,69.542) ENVELOPE(-138.455,-138.455,69.233,69.233) ENVELOPE(-136.459,-136.459,67.775,67.775) ENVELOPE(-136.455,-136.455,68.500,68.500) |
geographic |
Arctic Yukon Varden Firth River Babbage River Rat River Big Fish River |
geographic_facet |
Arctic Yukon Varden Firth River Babbage River Rat River Big Fish River |
genre |
Arctic Arctic Yukon |
genre_facet |
Arctic Arctic Yukon |
op_relation |
doi:10.5061/dryad.6nd54/1 doi:10.1007/s10592-016-0915-5 doi:10.5061/dryad.6nd54 Harris LN, Palstra FP, Bajno R, Gallagher CP, Howland KL, Taylor EB, Reist JD (2016) Assessing conservation risks to populations of an anadromous Arctic salmonid, the northern Dolly Varden (Salvelinus malma malma), via estimates of effective and census population sizes and approximate Bayesian computation. Conservation Genetics 18(2): 393-410. 1566-0621 http://hdl.handle.net/10255/dryad.132081 |
op_doi |
https://doi.org/10.5061/dryad.6nd54 https://doi.org/10.5061/dryad.6nd54/1 https://doi.org/10.1007/s10592-016-0915-5 |
_version_ |
1766300864732987392 |