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Salmon, also known as salmonids, are anadromous fish renowned for their unique life cycle and precise migrations: They are born in fresh water, spend much of adulthood in the open ocean, and return to the same stream to spawn. Salmon found along the northern Pacific Rim of North America, Russian Siberia, and Japan belong to the genus Oncorhynchus (cherry, chinook, chum, coho, pink, sockeye, and cutthroat and steelhead trout species) and belong to the family Salmonidae. Those found in the Atlantic Ocean belong to the genus Salmo (Atlantic, brown trout, and land-locked species). Salmonids are found in discrete breeding populations known as spawning stocks.

Salmon are species of conservation concern with hundreds of spawning stocks at risk and several already extinct. Healthy populations of salmon require ...

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