Have to look at individual brood years which requires complete age analyses. On the White and S Prairie when the pinks boomed the SH R/S improved. The pink/steelhead-coho benefit accrues on the brood that pawned the year before the pinks. Also need to be able to look at the whole production; catch and escapement. Steelhead, with essentially all the fishery terminal the run reconstruction should be easiest. Chinook would be hardest because you would need (to my mind) the adult-equivalent run for each brood year stratified by age each year.

It is interesting that the Keogh River steelhead responded immediately to the fertilization and this kept up when pinks replaced the fertilizer. When either the fertilizer (budgets) or pinks dropped off so did the steelhead. On Ford Arm in AK it was the cohonwho responded immediately and closely followed the annual pink spawn while the steelhead lagged close tp 5 or 10 years behind. That same sort of lag was seen in a lake fertilization project designed to compensate for mysid introduction. The kokanee responded immdediately while the Gerrard Rainbow were, again, 5-10 years behind.