Boaters Urged to Help Fight Spread of Invasive Quagga and Zebra Mussels Over Memorial Day Weekend


Contacts:

Gloria Sandoval, Department of Boating and Waterways, (916) 715-1657
Kyle Orr, Department of Fish and Wildlife, (916) 322-8958
Roy Stearns, Department of Parks and Recreation, (916) 654-7538
Christina Jimenez, Department of Water Resources, (916) 653-0979
Steve Lyle, Department of Food and Agriculture, (916) 654-0462


May 23, 2013


The California interagency effort fighting the spread of invasive quagga and zebra mussels urges boaters to remain vigilant over the three-day Memorial Day weekend.

People who launch vessels at any body of water are subject to watercraft inspections, and are encouraged to clean, drain and dry their motorized and non-motorized boats, including personal watercraft, and any equipment that comes into contact with the water before and after recreating at a waterway.

“Boaters have taken an active role in preventing the spread of mussels,” said California Department of Fish and Wildlife (CDFW) Director Charlton H. Bonham. “These efforts must continue, so that the state’s aquatic resources are protected and available for the enjoyment of all.”

Quagga and zebra mussels, non-native freshwater mussels native to Eurasia, multiply quickly and encrust watercraft and infrastructure, and compete for food with native and sport species. These mussels can be spread from one body of water to another attached to nearly anything that has been in an infested waterbody, or via standing water from an infested waterbody entrapped in boat engines, bilges, live-wells and buckets.

To ensure watercraft are clean, drained and dry, many local agencies are conducting boat inspections. CDFW has posted a list of these inspections on its website (www.dfg.ca.gov/invasives/quaggamussel) along with additional information about the invasive mussels and what people can do to help prevent their spread in California. Boaters should call ahead to check for restrictions prior to visiting their destination.

To prevent spreading invasive mussels and to breeze through an inspection, boaters can take steps before arriving at a water body. These include inspecting all exposed surfaces, removing all plants and organisms, draining all water, including water contained in lower outboard units, live-wells and bait buckets, and allowing the watercraft to thoroughly dry. Watercraft should be kept dry for at least five days in warm weather and up to 30 days in cool weather between launches in different bodies of fresh water. These measures are essential to safeguard California waterways.

CDFW has developed a brief video demonstrating the ease of implementing the clean, drain and dry prevention method, which can be viewed at http://www.youtube.com/watch?v=GaeAIPLoK-k. In addition, a detailed guide to cleaning vessels of invasive mussels is available on the Department of Boating and Waterways website at http://www.dbw.ca.gov/PDF/BoatingQuaggaGuide.pdf.

Travelers are also advised to be prepared for inspections at California Department of Food and Agriculture Border Protection Stations. Inspections, which can also be conducted by CDFW and the Department of Parks and Recreation, include a check of boats and personal watercraft, as well as trailers and all onboard items. Contaminated vessels and equipment are subject to quarantine or impoundment.

Quagga mussels were first detected in the Colorado River system in January 2007 and were later found in San Diego and Riverside counties. They are now known to be in 24 waters California, all in Southern California. Zebra mussels were discovered in San Justo Reservoir in San Benito County in January 2008.

Both species can attach to and damage virtually any submerged surface. They can:

  • Ruin a boat engine by blocking the cooling system and causing it to overheat
  • Jam a boat’s steering equipment, putting occupants and others at risk
  • Require frequent scrapping and repainting of boat hulls
  • Colonize all underwater substrates such as boat ramps, docks, lines and other underwater surfaces, causing them to require constant cleaning
  • Cost the owners of these items a lot of money

A multi-agency effort that includes CDFW, the Department of Boating and Waterways, Department of Water Resources and State Parks has been leading an outreach campaign to alert the public to the quagga and zebra mussel threats. A toll-free hotline at 1-866-440-9530 is available for those seeking information on quagga or zebra mussels.