What do you think of those apples, PETA? And I wonder what a sea lion burger tastes like?
Ok, granted. When it comes to fish migration, dams are a problem. Even with the most efficient fish ladders the fish still pile up and become easy pickings for predators and the miles of slack water behind dams prevent smolts from getting down stream faster and further decreases their chances of survival. However, our country needs electricity and until we find better ways to produce it, hydro is here to stay. When it comes right down to it, if we had to choose between fish or having the lights on, the fish would loose. But God knows we don't want that so we need to manage fish protection in other ways. If we create an unnatural barrier that changes the way nature works, it upsets the balance so I believe it's up to us to compensate for it by managing the consequences of our actions. That is, by controlling the over abundance of fish eating things that would not be there in such numbers if we hadn't built concrete walls along fish routes.
Although we have little control or understanding of what happens to salmon in the ocean, we do know that thousands of birds and sea lions take a substantial chunk out of the fish population. This is something we can observe and do something about and sometimes it's an easy decision to make. I am thoroughly in favor of managing bird and sea lion populations even if it only saves (according to PETA) 5% of the fish. Five percent out of a million is still a big number and it will allow us to keep the lights on for a little while longer.