Chum escapements are, or were, estimated based on live counts made weekly. One drought year a small southern HC stream was close to dry. No chum on count day. Then it rained. The next count day, a week later, the stream was full of spawned out dead chum. No live count that year.

The more time one spends on traps (where you can actually count and the fish) the more weird things you see.

In an effort to get summer pinks for a recovery program on the Dungeness we installed a trap low in the river. First day 400 coho were passed. In late summer. There are (or more accurately were) no known summer coho in that river.