Herm,

I didn't read the "effectiveness" part...

Use whatever scent (flavor) you have confidence in. With minor differences (strength), I don't think one is more effective than the other. All of them mask odor- that's is the most important factor (for salmon). The scent trails left by pastes are actually small and only really help if Mr. Salmon is following the bait at a close distance. The liquid types will provide a decent scent trail however, it will wash off in no time from trolling around.

Let me throw a curve ball in there.... I would choose herring or shrimp before anchovy in the sound. Blackmouth in the sound are more in tune with the herring than anchovy... Although the anchovy is consider a forage fish in Washington, there presence in the strait/sound is minimal at best- unlike off the Columbia R.

Some folks like to mix and match flavors... I think it is more of a confidence thing at that point. I like to follow the "natural" flavors.

I use only two flavors... Herring and garlic (fresh crushed) or herring and (secret).