Arctic | Fishes and Fish Habitats
Pink salmon in the North American Arctic: Natural expansions from the Pacific or invasions from the Atlantic? Presenter: Elizabeth Lee , elizabeth.lee@alaska.gov, Alaska Department of Fish and Game Tyler Dann , tyler.dann@alaska.gov, Alaska Department of Fish and Game Karen Dunmall , Karen.Dunmall@dfo-mpo.gc.ca, Fisheries and Oceans Canada Sten Karlsson , Sten.Karlsson@nina.no, Norwegian Institute for Nature Research Julien April , julien.april@mffp.gouv.qc.ca, Ministère des Forêts, de la Faune et des Parcs Christopher Habicht , chris.habicht@alaska.gov, Genetics Laboratory, Division of Commercial Fisheries, Alaska Department of Fish and Game Sara Gilk-Baumer , sara.gilk@alaska.gov, Alaska Department of Fish and Game Climate and human induced shifts in Pink Salmon distribution have been documented across the Northern Hemisphere, including expansion into Arctic regions. An improved understanding of the origin of expanding salmon populations will benefit research and management of the species. We present genetic observations of Pink Salmon ( Oncorhynchus gorbuscha ) expansions into the Alaskan and Canadian Arctic to shed light on the relative roles of climate and human influences on the distribution and establishment of these invading salmon. To do this, we genotyped baseline Pink Salmon collections from the natural range across the Pacific Rim, from Norwegian rivers that represent secondary colonizations from stocking operations in the White Sea, and from the Great Lakes that represent secondary colonizations from an accidental release. We then genotyped samples of invading Arctic Pink Salmon for evidence of: origin, deviation from the strict 2-year life history found in their natal range (but not in some introduced areas), and self- sustaining populations. For origin, we test the hypothesis that North American Arctic individuals originate from natural colonization from the Pacific Ocean, from the Russian stocking in the White Sea (1956-1979; 1985-1999) of Magadan region stocks, or from the Canadian accidental release into the Great Lakes (1955) of a British Columbia stock. We screened 298 amplicons in a genotyping-in-thousands by sequencing panel, to examine conformance to Hardy-Weinberg Equilibrium expectations, heterozygosity, and genetic relationships to baseline populations.
Alaska Marine Science Symposium 2023 71
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