Public Trust Tuesday: Private Fish Farms in Public Waters

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FLOW’s organizing principle is the public trust doctrine.  What sounds like an exotic concept is quite simple.  This centuries-old principle of common law holds that there are some resources, like water and submerged lands, that by their nature cannot be privately owned.  Rather, this commons – including the Great Lakes — belongs to the public.  And governments, like the State of Michigan, have a responsibility to protect public uses of these resources.  We explicitly address public trust concerns on what we’re calling Public Trust Tuesday.


Lawmakers in Michigan should learn from the experience in Washington state, where the legislature just voted to ban Atlantic salmon fish farming in Puget Sound, and expressly prohibit factory fish farms in the Great Lakes and its tributaries before corporate proposals to privatize and farm Michigan-controlled waters take root.

As FLOW has outlined in its recent Great Lakes fish farming issue brief, the lessons from across the nation and globe are clear:

  • Non-native fish in floating cages or net-pens occupying public waters inevitably escape and compete with wild fish for food, spread disease, and threaten genetic diversity.
  • Private fish farms in public waterways undermine public access, recreation, drinking water supplies, sport fishing, and jobs.
  • Factory fish farming concentrates and releases untreated waste, excess nutrients, and antibiotics and other pharmaceuticals, spurring outbreaks of disease and algae growth.

The bottom line is that it’s the government’s perpetual duty under public trust common law to protect the Great Lakes and its tributaries for the public’s current and future benefit, including for drinking, boating, fishing, swimming, sustenance, and navigation for the enjoyment of current and future generations. Ongoing efforts by the state of Michigan, aided by Michigan State University Extension, to justify and minimize – rather than prohibit – private farming of fish in public waters are completely misguided.

It’s time for Michigan lawmakers to follow the lead of Senator Rick Jones, R-Grand Ledge, and Rep. Gary Howell, R-North Branch, who have introduced legislation to ban open-water fish farms in Michigan’s Great Lakes waters to protect “our clean water, our water-based economy, and our outdoor way of life.”

Click here to learn more about FLOW’s program to challenge aquaculture in the Great Lakes.


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