Hi Rachel, That's really interesting - thanks for sharing details on the fisherfolk population and the fish that can consume water hyacinth.
Are there any estimates of how much damage dead zones are costing the 4 million fisherfolk?
For example, in the Gulf Coast region of the US, it is estimated that the dead zone is costing the seafood industry $38 million a year, according to the National Oceanic and Atmospheric Administration. (Whitworth, Joe S. (2015-09-08). Quantified: Redefining Conservation for the Next Economy (Kindle Locations 2845-2846). Island Press. Kindle Edition. )
Is it possible that the fisherfolk or downstream purchasers could help fund the purchase of the equipment that digs the oxidation ponds and benefit from improved yields?