NDLI: Archival genetic analysis suggests recent immigration has altered a population of Chinook salmon in an unsupplemented wilderness area

Content Provider	Springer Nature Link
Author	Hess, Jon E. Matala, Andrew P.
Copyright Year	2013
Abstract	Detecting genetic population shifts (i.e. allele frequency differences) through time is a primary function of effective conservation monitoring, but it is equally vital to understand the underlying causative factors of change which may be revealed through analyses of long-term, temporal trends. We compared archival and contemporary Chinook salmon (Oncorhynchus tshawytscha) collections from the John Day River in Oregon, USA, to evaluate the temporal relationships among four primary spawning areas over a span of 28 years (1978–2006). Although it lies amid many hatchery-supplemented salmon populations of the Columbia River, the John Day River has itself experienced no directed supplementation. Using a combined panel of 13 microsatellite and 92 single nucleotide polymorphism loci, we observed significant temporal heterogeneity across sample sites and tested for two likely evolutionary influences: stochastic processes (i.e. genetic drift) and gene flow via immigration. Based on abundance and effective population size estimates, we found no evidence indicating a recent bottleneck. We observed a sharp temporal decline in probability of self-assignment of John Day River fish, particularly for the North Fork tributary. There was a corresponding increase in assignment to distant Snake River populations, attributed to accumulating introgression from out-of-basin sources over time. Our study demonstrates that low level immigration sustained over multiple generations can alter the genetic composition of natural populations, and while immigration may help maintain genetic population diversity, it risks reducing adaptive advantages in local ecosystems.
Starting Page	387
Ending Page	403
Page Count	17
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	15
Issue Number	2
e-ISSN	15729737
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-10-22
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Genetic monitoring Abundance Effective population size Adaptation Straying Population trend Salmonid Conservation Biology/Ecology Plant Sciences Animal Anatomy / Morphology / Histology Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Detecting population recovery using gametic disequilibrium-based effective population size estimates

Genetic diversity over multiple generations of supplementation: an example from Chinook salmon using microsatellite and demographic data

Landscape heterogeneity and local adaptation define the spatial genetic structure of Pacific salmon in a pristine environment

Genetic variation and effective population size in isolated populations of coastal cutthroat trout

MHC-mediated local adaptation in reciprocally translocated Chinook salmon

Functional gene diversity and migration timing in reintroduced Chinook salmon

Comparative survey of within-river genetic structure in Atlantic salmon; relevance for management and conservation

Effective size of an Atlantic salmon (Salmo salar L.) metapopulation in Northern Spain

Genetic clustering methods reveal bull trout (Salvelinus confluentus) fine-scale population structure as a spatially nested hierarchy

Archival genetic analysis suggests recent immigration has altered a population of Chinook salmon in an unsupplemented wilderness area

Similar Documents

Detecting population recovery using gametic disequilibrium-based effective population size estimates

Genetic diversity over multiple generations of supplementation: an example from Chinook salmon using microsatellite and demographic data

Landscape heterogeneity and local adaptation define the spatial genetic structure of Pacific salmon in a pristine environment

Genetic variation and effective population size in isolated populations of coastal cutthroat trout

MHC-mediated local adaptation in reciprocally translocated Chinook salmon

Functional gene diversity and migration timing in reintroduced Chinook salmon

Comparative survey of within-river genetic structure in Atlantic salmon; relevance for management and conservation

Effective size of an Atlantic salmon (Salmo salar L.) metapopulation in Northern Spain

Genetic clustering methods reveal bull trout (Salvelinus confluentus) fine-scale population structure as a spatially nested hierarchy

Archival genetic analysis suggests recent immigration has altered a population of Chinook salmon in an unsupplemented wilderness area