1. Zebra Mussel Prevention at Lake Powell Glen Canyon National Recreation Area

2. Dreissena polymorpha and D. bugensis (quagga mussel) Small invasive mussel with varying stripes Attaches to surfaces with byssal threads Meet the Zebra Mussel

3. Cost to Facilities Forms thick mats Fills intake pipes Clogs trash screens Encrusts docks, launch ramps, rocks, and anything else in the water

4. Cost to Recreation Encrusts Boats Clogs Engines

5. Covers beaches with sharp shells Fills air with stench of decay Encrusts Boats Clogs Engines Cost to Recreation

6. No ecologically friendly way to eradicate Encrusts and kills any bottom critters (clams, crayfish, …) Ecological Damage

7. No ecologically friendly way to eradicate Encrusts and kills any bottom critters (clams, crayfish, …) Ecological Damage Filters enormous amounts of algae, disrupting the food chain No natural predators of consequence Accumulates toxins: Biomagnification

8. Why Lake Powell? Considered the most likely point of introduction to the Colorado River System Good Conditions for Zebra Mussels

9. Why Lake Powell? Considered the most likely point of introduction to the Colorado River System Good Conditions for Zebra Mussels Mussels are transported on boats, in bilge water, in engines, on trailers, with bait

10. Life Cycle

11. History of Invasion From the Caspian and Black Seas Took over all of Europe

12. History of Invasion From the Caspian and Black Seas Took over all of Europe Came to America in ballast water Discovered in Lake St. Clair in 1988 Moved through the Great Lakes and 8 major rivers in the East

13. Zebra Mussel Spread

14. What is being done for the Colorado River System? Lake Powell Prevention Program Utah Aquatic Nuisance Species Action Team Utah Division of Wildlife Resources Education through signs and brochures Boat inspections at 15 State Parks

15. What is being done for the Colorado River System? Lake Powell Prevention Program Utah Aquatic Nuisance Species Action Team Utah Division of Wildlife Resources Education through signs and brochures Boat inspections at 15 State Parks 100 th Meridian Initiative National Invasive Species Act (1996) Forum for multi-agency cooperation Stop the spread of Aquatic Nuisance Species from East to West at the 100 th Meridian

16. Lake Powell Prevention Monitoring Screening Washing

17. Visitor Screening -Has your vessel been used east of the Rocky Mountains in the past 30 days? -In which state(s) or province(s) east of the Rocky Mountains was your vessel used? -Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Minnesota, Mississippi, Missouri, New York, Ohio, Oklahoma, Pennsylvania, Tennessee, Vermont, West Virginia, Wisconsin, Ontario Canada, Quebec Canada

18. Prevention Packet Informative pamphlet Coupon for boat washing Map to washing facilities

19. Washing Procedure Assume boat is infested Remove any organic matter High pressure wash Hull, lines, bumpers, motor, trim tabs, anchor trailer, and all nooks and crannies Drain and flush any water >140 degrees F Bilge, live wells, bait buckets, cooling system

20. Washing Procedure

22. Prevention Program Results for the 2001 Season 13 potentially infested boats entered 9 were voluntarily washed Roughly the same as 2000

23. For more information Mark Anderson -928-608-6266 -Mark_Anderson@nps.gov Web Resources -www.100thMeridian.org -www.wes.army.mil/el/zebra/zmis/zmishelp.htm

24. National Park Service Mission Protect resources Provide recreation Web Resources -www.100thMeridian.org -www.wes.army.mil/el/zebra/zmis/zmishelp.htm