2 Chinook Salmon (Oncorhynchus tshawytscha) (Okanagan Population)
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In Canada, the Okanagan population of Chinook Salmon is limited to the Okanagan River which is a tributary of the Columbia River. While Okanagan Chinook Salmon are geographically, reproductively and genetically distinct from all other Canadian Chinook Salmon populations, studies have confirmed that a small proportion of the fish entering Canada were released from hatcheries in the United States. Perhaps as a consequence, Okanagan Chinook Salmon are genetically similar to Upper Columbia Summer Chinook. A recent study indicates that Okanagan Chinook Salmon are anadromous, meaning that they migrate to and from the Pacific Ocean through the Columbia River. Studies indicate that American dams on the Columbia River represent the greatest threat to the survival of Upper Columbia River Chinook Salmon.
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