Show simple item record Matala, Andrew P. Allen, Brady Narum, Shawn R. Harvey, Elaine
dc.coverage.spatial Columbia River Basin
dc.coverage.spatial USA
dc.coverage.temporal Holocene 2017-09-12T20:41:18Z 2017-09-12T20:41:18Z 2017-09-09
dc.identifier doi:10.5061/dryad.bh78m
dc.identifier.citation Matala AP, Allen B, Narum SR, Harvey E (2017) Restricted gene flow between resident Oncorhynchus mykiss and an admixed population of anadromous steelhead. Ecology and Evolution 7(20): 8349-8362.
dc.description The species Oncorhynchus mykiss is characterized by a complex life history that presents a significant challenge for population monitoring and conservation management. Many factors contribute to genetic variation in O. mykiss populations, including sympatry among migratory phenotypes, habitat heterogeneity, hatchery introgression, and immigration (stray) rates. The relative influences of these and other factors are contingent on characteristics of the local environment. The Rock Creek subbasin in the middle Columbia River has no history of hatchery supplementation and no dams or artificial barriers. Limited intervention and minimal management have led to a dearth of information regarding the genetic distinctiveness of the extant O. mykiss population in Rock Creek and its tributaries. We used 192 SNP markers and collections sampled over a 5-year period to evaluate the temporal and spatial genetic structures of O. mykiss between upper and lower watersheds of the Rock Creek subbasin. We investigated potential limits to gene flow within the lower watershed where the stream is fragmented by seasonally dry stretches of streambed, and between upper and lower watershed regions. We found minor genetic differentiation within the lower watershed occupied by anadromous steelhead (FST = 0.004), and evidence that immigrant influences were prevalent and ubiquitous. Populations in the upper watershed above partial natural barriers were highly distinct (FST = 0.093) and minimally impacted by apparent introgression. Genetic structure between watersheds paralleled differences in local demographics (e.g., variation in size), migratory restrictions, and habitat discontinuity. The evidence of restricted gene flow between putative remnant resident populations in the upper watershed and the admixed anadromous population in the lower watershed has implications for local steelhead productivity and regional conservation.
dc.relation.haspart doi:10.5061/dryad.bh78m/1
dc.relation.isreferencedby doi:10.1002/ece3.3338
dc.subject resident redband trout
dc.subject steelhead trout
dc.subject sympatry
dc.subject admixture
dc.subject habitat heterogeneity
dc.subject immigration
dc.title Data from: Restricted gene flow between resident Oncorhynchus mykiss and an admixed population of anadromous steelhead
dc.type Article
dwc.ScientificName Oncorhynchus mykiss
dc.contributor.correspondingAuthor Matala, Andrew
prism.publicationName Ecology and Evolution

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