Here is a stat that will get you attention:
In 1970, hatcheries released 500 million young salmon. By 2008, that figure had jumped to 5 billion.
Environmental journalist Bruce Barcott reports on how hatchery salmon are crowding out their wild counterparts.
The number of salmon in the Pacific Ocean is twice what it was 50 years ago. But there is a downside to this bounty, as growing numbers of hatchery-produced salmon are flooding the Pacific and making it hard for threatened wild salmon species to find enough food to survive.
LINK (Via: Yale Environment 360)