More salmon but more of them are of hatchery origin
The proportion of hatchery versus wild Pacific salmon has risen to 1 in 5 with an overall production of 5 billion smolts produced annually, up from just 500 million in 1970. There are problems which stem from this. For imperiled salmon, the competition and genetic implications from these hatchery fish can be profound and effect the survivability of the runs which face the highest risk.
Hatch-22: The Problem with the Pacific Salmon Resurgence.
By Bruce Barcott – AlterNet