In my pond, YP have effectively reduced the snail population to a very low point, or have eliminated them altogether.
10 years ago we had few perch and lots of snails. I've hammered down the LMB to the point where I rarely catch one. I also added more perch. For several years perch had many snails in their bellies; now I don't clean a perch and find a snail in it.
The pond has way too much elodea which should be wonderful snail habitat. When I rake out the elodea each summer, I do not find snails on the weeds.
I'd like to introduce pumpkinseed sunfish (PS), but I have no source for these beautiful fish.
My conclusion is the YP have wreaked havoc on the snails.
