treesparrow
 Kind of off subject but funny, and perhaps one of many reasons most docks do not allow fishing off them. Years ago on Edinboro Lake there was a fella named Frank who had a Marina with docks. My brothers and I would fish everyday on those docks. One morning after a good rain half the boat covers had puddles in them and we decided to stock them . Well that was fine in the morning when it was cool. However by afternoon and hot Mr. Sun,  I don't have to tell you what the boat owners found. Amazing how fast fish turn. Well old Frank had some words with us and I am truly glad we were not around when it was first discovered. I have to say Frank was always good to us kids and he was to us a true gentleman. 
 Ah youth and getting a thrill out of catching 3" Bluegills.
 
C.H. Ducks and geese spread Perch eggs from one water to another I am told. I do not see why they wouldn't spread small pieces of vegetation.