1 / 13

Results of Zebra Mussel Surveys Lake Mead National Recreation Area

Results of Zebra Mussel Surveys Lake Mead National Recreation Area. Dr. Shawn Gerstenberger University of Nevada Las Vegas Department of Environmental Studies January 17, 2003. Four Main Survey Types. 1) Trailer Counts for Launch Areas*** 2) Trailered Boat Survey (interview)

bozica
Download Presentation

Results of Zebra Mussel Surveys Lake Mead National Recreation Area

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Results of Zebra Mussel SurveysLake Mead National Recreation Area Dr. Shawn Gerstenberger University of Nevada Las Vegas Department of Environmental Studies January 17, 2003

  2. Four Main Survey Types • 1) Trailer Counts for Launch Areas*** • 2) Trailered Boat Survey (interview) • 3) Boater Self Survey (windshield) • 4) Boat Traffic Summary* • All surveys are approved by the committee on the use of human subjects at UNLV.

  3. Survey Dates(26 trips so far) • October: 19 and 20 • November: 1, 7, 22, 23, and 24 • December: 1,5,6,7,8,14,16,17,26,27,28, and 29 • January: 3, 5,6,7,8,14, and 16

  4. Overton Beach Echo Bay Callville Bay Las Vegas Bay Lake Mead Marina Hemenway Harbor Willow Beach Katherine’s Landing Princess Cove Cottonwood Cove Location of Sample SitesLake Mead National Recreation Area

  5. Trailer Count for Launch Areas and Related Facilities Survey Totals • Start Date: October 19, 2002 • End Date: January 8, 2003 • Total Trailers Surveyed: 1871

  6. Totals By StateOther States Include: Texas, South Dakota, Montana, Kansas, Mississippi, Washington, Minnesota, Arkansas, Missouri, Florida, Illinois, Kentucky, Louisiana, New Mexico, New York,Pennsylvania

  7. Nevada Total: 1221 63% Other States Total: 650 37% In State vs. Out-of-State

  8. Summary of Observations • Nothing Found • Grass pieces found on trailers from Kansas, no organisms present.

  9. October Total 685 NV 376 Other 309 November Total 472 NV 307 Other 165 December Total 657 NV 462 Other 165 January Total 118 NV 82 Other 36 Totals By Month

  10. Future Surveys • Awaiting Park Service approval for Interviews and Self Surveys • 1000 self-surveys (Self-Inspection Forms) with pre-paid postage are copied and ready to be placed on windshields. • A few Trailer Boat Traffic Survey forms have been completed (data not shown).

  11. Future Surveys (cont.) • Will continue to sample through warm weather months. • Interviews and mail in surveys will be completed ASAP.

  12. Summary • Trailers originating from 26 different states have been documented. • Predominantly from Nevada and adjacent states, but states East of 100th Meridian are present. • No visible signs of ZM or other potentially invasive species noted on trailers.

  13. ACKNOWLEDGEMENTS • US FISH AND WILDLIFE SERVICE • LAKE MEAD NRA • CAROL LANE • MEGAN MCCOY

More Related