Data from: Mechanisms of thermal adaptation and evolutionary potential of conspecific populations to changing environmentsZhongqi Chen, Anthony P. Farrell, Amanda Matala & Shawn R. Narum
Heterogeneous and ever-changing thermal environments drive the evolution of populations and species, especially when extreme conditions increase selection pressure for traits influencing fitness. However, projections of biological diversity under scenarios of climate change rarely consider evolutionary adaptive potential of natural species. In this study, we tested for mechanistic evidence of evolutionary thermal adaptation among ecologically divergent redband trout populations (Oncorhynchus mykiss gairdneri) in cardiorespiratory function, cellular response and genomic variation. In a common garden environment,...
Data from: Landscape features along migratory routes influence adaptive genomic variation in anadromous steelhead (Oncorhynchus mykiss)Steven J. Micheletti, Amanda R. Matala, Andrew P. Matala & Shawn R. Narum
Organisms typically show evidence of adaptation to features within their local environment. However, many species undergo long-distance dispersal or migration across larger geographical regions that consist of highly heterogeneous habitats. Therefore, selection may influence adaptive genetic variation associated with landscape features at residing sites and along migration routes in migratory species. We tested for genomic adaptation to landscape features at natal spawning sites and along migration paths to the ocean of anadromous steelhead trout (Oncorhynchus...
Data from: Signatures of polygenic adaptation associated with climate across the range of a threatened fish species with high genetic connectivityKatherine A. Harrisson, Stephen J. Amish, Alexandra Pavlova, Shawn R. Narum, Marina Telonis-Scott, Meaghan L. Rourke, Jarod Lyon, Zeb Tonkin, Dean M. Gilligan, Brett A. Ingram, Mark Lintermans, Han Ming Gan, Christopher M. Austin, Gordon Luikart & Paul Sunnucks
Adaptive differences across species’ ranges can have important implications for population persistence and conservation management decisions. Despite advances in genomic technologies, detecting adaptive variation in natural populations remains challenging. Key challenges in gene-environment association studies involve distinguishing the effects of drift from those of selection, and identifying subtle signatures of polygenic adaptation. We used paired-end restriction-site associated-DNA sequencing data (6605 biallelic single nucleotide polymorphisms; SNPs) to examine population structure and test for signatures of adaptation...
Data from: Restricted gene flow between resident Oncorhynchus mykiss and an admixed population of anadromous steelheadAndrew P. Matala, Brady Allen, Shawn R. Narum & Elaine Harvey
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...
Columbia River Inter-Tribal Fish Commission4
University of Montana1
Department of Primary Industries, Parks, Water and Environment1
Monash University Malaysia1
La Trobe University1
United States Geological Survey1
University of British Columbia1
University of Canberra1