By BETSY BLANEY and URIEL J. GARCIA
LEWISVILLE, Texas (AP) - A pesky, non-native shellfish is causing big headaches as it migrates southward into more North Texas lakes.
Four years after first arriving in Texas, zebra mussels or their larvae can now be found in at least four lakes in the region after being confirmed in Lewisville and Bridgeport lakes this summer.
Their presence can cause major financial problems for boaters and water suppliers by clogging inflow pipes and building colonies inside boat engines.
Wildlife officials are trying protect other lakes fed by the Trinity River by requiring people to clean, dry and drain their boats. Those caught transporting or possessing the zebra mussel can be charged with a misdemeanor.
The mussels are also in Texoma and Ray Roberts lakes, with several other high-risk areas being monitored for possible populations.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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