Fish ladders don’t work for all ocean migrating fish and the reasons are complicated.
Bonneville Power has spent Billions, (with a B) trying to improve salmon habitat and fisheries in Idaho and on the Snake and Colombia rivers. The problem, apparently, is salmon make it up the ladders, but the smolt can’t handle the lack of current in the lakes behind the dams when they return to the ocean. Bonneville Power has funded barging fish around the dams and all kinds of very expensive failures.
And accepting that removing some of the dams is the solution is a theory...there is no, zero, nada proof that this will work.
The reality is salmon may become extinct in certain river systems...they are NOT going extinct!
How ironic that the northern snakehead is a species of snakehead fish native to China, Russia, North Korea, and South Korea, ranging from the Amur River to Hainan. It has been introduced to other regions, where it is considered invasive.
They get to 33 inches long and destroy the population of native fish. Sounds like China’s biowarfare fish immigration plan!
Thanks for reply.
Isn't salmon a major part of food cycle in Alaska?