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Why
are salmon in trouble? - Over-fishing
One
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.
To learn
more.
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