These dams were built starting over 100 years ago.
But now we need fish ladders for the breeding of the fish?
What have the fish been doing for the last 100 years?
Using elevators !
The fish elevator operators are on strike !
“What have the fish been doing for the last 100 years?”
EXCELLENT question!
What have the fish been doing for the last 100 years?
= = =
Getting really, really horny.
They could probably take out the dams themselves, with a coordinated attack.
Or, for the total price of the demolition, each salmon could be given a personal limo ride upstream, to the tributary of his/her/zin choice.
That is if they have not transitioned to some infertile species.
Not returning to habitat upstream from the dam. Salmon have been extirpated from previous range in some places.
But now we need fish ladders for the breeding of the fish?
What have the fish been doing for the last 100 years?
Disappearing.
They've been absent from the waters above the dams.
salmon return to the river they were born in. Dams prevent their return. Barge transport does not work very well, hence fish ladders. No ladders, no fish. Then, going out to the ocean, the smolts must avoid being sucked into the turbines and killed, or eaten by birds. Then four years later when they return, they have to get by hordes of seals and sea lions.
What have the fish been doing for the last 100 years?
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At a very small dam on a river in SW WI, we have video of trout jumping against the flow to get back to where they once belonged.
No ladders.
The largest ones made it. The smaller ones, not that often.
I don’t know about this dam but the docent at the Coulee dam in WA, told us that the salmon had been in decline before the dam was built. It is apparent that they (the environmentalists ) are looking at the wrong end of the rivers for the fish decline. The declines seem to be be due to development at the mouths of the rivers which dries up the delta and causes a decline in the herring or other small fish that the salmon feed on and which draw the salmon into the rivers.