Rather interesting read:

Fish math

A group of international fisheries scientists is now pointing out the simple, ecological reality of mathematics long ignored by Alaska salmon managers: addition matters as well as subtraction.

With the human-manipulated ecosystem of the North Pacific Ocean once again oscillating wildly, they are warning that fishery management isn’t just about the removals of salmon via human harvests; it is also about the additions of billions of the little fish now dumped into the ocean each year by industrial-scale salmon hatcheries in Alaska, Japan and Russia.

“The intentional release can have wider-ranging consequences than previously thought, as the impacts can propagate through a diversity of ecological interactions,” they warn in a peer-reviewed paper published by Proceedings of the National Academy of Sciences of the United States of America (PNAS) last month.

https://craigmedred.news/2023/03/12/fish-math/