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Why are salmon in trouble? - Over-fishing

Commercial fishing boat with catch -early 20th centuryOne hundred years ago the major threat to salmon was commercial fishing, and as early as the beginning of the 20th century people began to notice the runs were declining. Gill nets, seines and fish wheels all decimated salmon populations. While many mass-catch fishing methods were outlawed over time, salmon runs continued to decline as over-fishing was replaced by other hurdles for salmon such as dams, habitat destruction and even early hatchery practices.

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