FWIW
Before didicated weirs and traps were in place at hatcheries the hatchery workers would cut the tails off some live fish and tether them on the oppsite side of the river from where they wanted to collect fish.The fish would move to the opposite side of the river,away form the blood,
and stop moving upriver.There are many good reasons for not putting fish blood in the creek.Perhaps this is one reason that in OREGON you may not clean fish in the stream.However most everyone does.

[ 01-10-2002: Message edited by: BILGERAT ]