Lake George Zebra Mussel Monitoring

Agency: Rensselaer Polytechnic Institute

Location: New York

Treatment Type: N/A

Treatment Method Used: N/A

In 1995 a veliger monitoring program was launched in Lake George, conducted at 12 different sites. The locations are surveyed biweekly during the summer months, and the program is ongoing today. In the event that veligers are identified in a sample, SCUBA surveys are conducted at that site to search for adult mussels. Recruitment monitoring took place in Lake George between 1995-2013. Four locations were sampled using spat traps twice a year. The program was discontinued as the cost did not justify the return, and it was believed that the data gathered through veliger and adult mussel surveys was sufficient to detect new introductions of zebra mussels. Yearly surveys for adult zebra mussels have been performed since 1999 following hand removal of zebra mussels at Lake George Village, focusing on marinas as the highest risk of introduction. Calcium concentrations are monitored where zebra mussels are found, and any mussels that are found are removed, measured, and preserved. No zebra mussels have been found at new locations in Lake George since 2011. All citizen reports made to the Rensselaer Polytechnic Institute - Darrin Fresh Water Institute are also investigated, with a survey occurring within a week after an initial report.


Frischer, M.E., B.R. McGrath, A.S. Hansen, P.A. Vescio, J.A.Wyllie, J. Wimbush, and S.A. Nierzwicki-Bauer. 2005. Introduction pathways, differential survival of adult and larval zebra mussels (Dreissena polymorpha), and possible management strategies, in an Adirondack Lake; Lake George, NY. Lake and Res. Mng. 21:391-402.

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Sandra Nierzwicki-Bauer, Rensselaer Polytechnic Institute

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