In 2012, the British Columbia–based Native American Haida tribe launched an effort to restore the salmon fishery that has provided much of their livelihood for centuries. Acting collectively, the Haida voted to form the Haida Salmon Restoration Corporation, financed it with $2.5 million of their own savings, and used it to support the efforts of American scientist-entrepreneur Russ George to demonstrate the feasibility of open-sea mariculture — in this case, the distribution of 120 tons of iron sulfate into the northeast Pacific to stimulate a phytoplankton bloom which in turn would provide ample food for baby salmon.
The verdict is now in on this highly controversial experiment: It worked.
In fact it has been a stunningly over-the-top success. This year, the number of salmon caught in the northeast Pacific more than quadrupled, going from 50 million to 226 million. In the Fraser River, which only once before in history had a salmon run greater than 25 million fish (about 45 million in 2010), the number of salmon increased to 72 million.