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Chuck and others,
My understanding is that typically weed control is joint decision made by lakeside home owners, the Department of Ecology, and the Department of Fish and Wildlife. Ecology is responsible for water quality and Fish and Wildlife is, of course, responsible for fish management. This may not be true in the case of Duck Lake, but I have seen cases in the past where lakes were treated for weeds and WDFW didn't seem to have a lot of input into the process. Why this is, I don't know.
As to why fishing tends to go bad in the years after major weed kills, that can be for several reasons:
- Like the technician said, in the near future there could be some oxygen problems caused by rotting vegetation, especially in a shallow lake like Duck that doesn't get a lot of wind action in the canals. But, this effect wouldn't last that long after the weeds have decayed completely, and there would be areas of the lake where the oxygen is fine.
- Once the weeds are gone, juvenile fish and small baitfish don't have anywhere to hide, so their survival tends to go down. If you can't grow small bass, they won't be big in the future. I think this was a big problem at Silver Lake.
- Water clarity can also go way down because the weeds aren't there to stabilize the lake bottom sediments and keep them from roiling around. Also, since more sunlight is hitting the water, there could be a chance that more algae blooms and clouds the water.
There could be other things as well, but I think the above list are major reasons.
Chris
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Duck Lake (Read 2508 times)
