Skip to main content
A standardized design for quagga mussel monitoring in Lake Mead, Nevada-Arizona
Aquatic Invasions
  • Wai Hing Wong, University of Nevada, Las Vegas
  • Shawn Gerstenberger, University of Nevada, Las Vegas
  • Jennell M. Miller, University of Nevada, Las Vegas
  • Craig Palmer, University of Nevada, Las Vegas
  • Bryan Moore, Lake Mead National Recreation Area
Document Type
Publication Date
The discovery of quagga mussels (Dreissena rostriformis bugensis) in Lake Mead, Nevada-Arizona, on January 6, 2007 is the first known occurrence of dreissenid species in the western United States. This study developed elements of a cost-effective and standardized quagga mussel-monitoring program for Lake Mead using preliminary data to arrive at statistically based numbers of sampling sites. To represent the abundance of adult/juvenile quagga mussels in Lake Mead’s heterogeneous floor with 95% confidence, a stratified simple random sampling design revealed a requirement of 41 samples from hard substrates (i.e., rocky areas) and 97 samples from soft substrates (i.e., sandy and muddy areas). A simple random sampling design demonstrated that 42 samples from the lake’s water column are necessary to represent veliger abundance with 95% confidence. Other important elements of the sampling program, such as standardization of protocols and processes and suggested data analyses, are discussed. The monitoring program, which is based on reconnaissance data, is intended to be optimized with data from its first year’s samples. The sample number-selection approach and the other elements of this plan can be easily implemented by lake managers and can also be adapted to other locations where dreissenid mussel monitoring is needed.
  • Colorado River system,
  • Dreissena rostriformis bugensis,
  • Environmental sampling,
  • Interagency,
  • North America – Colorado River,
  • Quagga mussel,
  • Simple Random Design,
  • Stratified Simple Random Design
Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.
Citation Information
Wai Hing Wong, Shawn Gerstenberger, Jennell M. Miller, Craig Palmer, et al.. "A standardized design for quagga mussel monitoring in Lake Mead, Nevada-Arizona" Aquatic Invasions Vol. 6 Iss. 2 (2011) p. 205 - 215
Available at: