LEWISVILLE — Carl Pearson dusts cobwebs off his boat as he prepares to push off into Lewisville Lake for some summer relaxation. At a nearby boat ramp a sign reminds him he’ll need to clean off more than cobwebs when he returns to shore: It’s illegal to transport zebra mussels from the lake.
The warning sign is part of an awareness campaign wildlife officials are waging to halt the migration of the pesky non-native shellfish that have spread this summer to more North Texas waters after already causing billions of dollars in economic damage in more than two dozen other states. The mussels clog inflow pipes of water suppliers, build colonies inside boat engines and can hurt lakeside businesses by making beach-walking hazardous with their sharp edges.
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