VENTURA, Calif. (AP) -- Officials are stepping up monitoring efforts to prevent an invasive mussel found in Ventura County's Lake Piru from spreading to other Southern California lakes.
The Ventura County Star reports that (http://bit.ly/JSmm2f ) recreational boaters can no longer move easily from Lake Piru to nearby Castaic and Pyramic lakes and must now face inspection.
Two other area lakes have implemented temporary quarantines for boats seeking to enter the water.
Water agencies in California have worked to fight off the quagga mussel, a prolific breeder that can clog pipes and machinery.
Lake Piru provides irrigation to major county farms and drinking water to parts of Oxnard.
Eloise Tavares, an environmental scientist with the state Fish and Wildlife Department, says it's not clear how the lake became infested.
Information from: Ventura County Star, http://venturacountystar.com
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