With regards to the idea that there were "lots" of pinks, or any other salmon, one needs to look at the density pf biomass and not simple numbers.

Those working in the ecological interactions of spawning use use kg/ square metre of stream measures at summer low flow. Take a stream that 10km long and 10m wide. That's about six miles long and 35 feet wide. This gives an area of 100,000 sqm. The infection point of loading is about 2 kg/sq m which is 200,000 kg. at 2 kg wt for pinks that lives 100,000. You can figure what the other species would result in. Streams in Idaho have successfully absorbed 8 kg over the course of a year.

Many studies have shown measurable benefits at about 0.6, based on spawning in the whole anadromous zone.

Our streams are starving.