Originally Posted By: Smalma

However I can not think of how fishing on incoming runs selects against the likelyhood of repeat spawning -would not those fish likely to repeat and those not to repeat be equally likely to be caught in the fishery? In fact the potential selection that I can think would be selecting for more repeat spanwers not less.

Fishing on incoming runs of steelhead might not select against repeat spawners if the period prior to downstream migration was long enough that those fish would not encounter any harvest on that pathway. However, it seems to me that fishing on incoming runs of different species, such as spring chinook could certainly increase the likelihood of of increased harvest of downstream fish and therefore repeat spawners. I guess it would depend on the proportion of spawners that actually survive to migrate downstream and the proportion of those that would be repeat spawners.