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Numerous federal, state, tribal and academic institutions are actively monitoring for zebra and quagga mussels (i.e., invasive mussels) and other nonnative species in a variety of ways. The information and maps contained within this site are intended to provide an up to date synopsis of who is monitoring for what species, where, how and when. This information can help managers and researchers to determine if the current level of monitoring is sufficient, or whether efforts should be redirected to better fulfill various needs. 



Quagga and Zebra Mussel Monitoring in the Pacific Northwest States and Canadian Provinces




Columbia River Basin Monitoring Forum

Dreissenid Mussel Monitoring Forum Workshop, Portland Oregon (June 5-6, 2018)

Sampling Considerations for Columbia River Basin Storage Reservoirs (2019)

Quagga/Zebra Mussel Sampling Methods Used by Western Organizations

Dreissenid Mussel Sampling and Monitoring Protocol (Western Regional Panel, September 2020)

Procedures for conducting underwater searches for invasive mussels (Dreissena sp.) (US Dept Interior, US Geological Survey 2010)


Dreissenid Mussel Laboratories

Laboratory Standards for Dreissena Veliger Analysis (Western Regional Panel, September 2020)

Link to information on laboratories in the United States and Canada that process dreissenid samples

A Comprehensive Report on the Workshops "Dreissena Early Detection Best Practices" and "Dreissena Early Detection Laboratory Standards"


Quagga/Zebra Mussel Field and Laboratory Protocols


Amistad National Recreation Area


British Columbia

Bureau of Reclamation




Glen Canyon National Recreation Area






Policy action needed to unlock eDNA potential (Lodge 2022)

Evaluating the Sensitivity and Reproducibility of Environmental DNA Field Sampling Workflows for Detection of Dreissenid Mussels (Sepulveda et al. 2022)

Combining sampling gear to optimally inventory species highlights the efficiency of eDNA metabarcoding (Lambert et al. 2022)

Adding invasive species biosurveillance to the U.S. Geological Survey stream gage network (Sepulveda et al. 2019)

eDNA Science Advisory Panel: A discussion on eDNA technology use in invasive species management (Montana Invasive Species Council 2018)

Key findings

Critical considerations for the application of environmental DNA methods to detect aquatic species (Goldberg et al. 2016)

Research Associated with Zebra/Quagga Mussel Sampling

Intact vs. homogenized subsampling: testing impacts of pre-extraction processing of multi-species samples on invasive species detection  (Pagenkopp Lohan et al. 2019)

Distribution and Density of Zebra Mussels in Four Kansas Reservoirs (Smith et al. 2016)

Critical considerations for the application of environmental DNA methods to detect aquatic species (Goldberg et al. 2016)

Comparison of Zebra Mussel Veliger Laboratory Enumeration and Sampling Techniques (Holoubek et al. 2014)

FireShot Capture 416 - Zebra and Quagga
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