What is really interesting is how the state and tribes will describe the amount of carcasses. Research has shown that up to 2 kilogrammes of carcass per square metre of stream (as measured at summer low flow) is the point at which the direct benefits to rearing juvenile salmon has a inflection from a steeply rising line to a flatter one. Represents a good target.

So, if it their position that the amount of carcasses provides an ecological benefit then why not let actual fish go upstream, spawn, and then provide the carcasses. Seems to me that it will be hard to say that what is seen in the picture is ecologically beneficial but allowing 1% of that number as the optimum number of spawners would seem to be a disconnect.