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August 26, 2014

Lake Champlain Fish and Wildlife Management Cooperative Will Treat Six Rivers and Three River Deltas to Control Sea Lamprey Populations

The Lake Champlain Fish and Wildlife Management Cooperative (Cooperative) will be applying lampricides to portions of six tributaries and three delta areas of Lake Champlain during the months of September and October.

The U.S. Fish and Wildlife Service, Vermont Department of Fish and Wildlife, and New York State Department of Environmental Conservation will be treating the Boquet, Ausable, Little Ausable, Salmon, and the Great Chazy rivers in New York and Lewis Creek in Vermont as part of the Cooperative’s long-term sea lamprey control program for Lake Champlain. The Boquet, Ausable, and Salmon river deltas will also be treated in New York. Treatments are scheduled to begin with the Boquet River on September 9th. Treatment dates are always contingent on weather and may change with short notice.

While trout and salmon populations of the lake are the primary beneficiaries of these efforts, lake sturgeon, walleye, and many other species also benefit from sea lamprey control. Sea lamprey control also generates economic activity by increasing angling opportunities and the time that boaters, anglers, and their families spend in the Lake Champlain area.

Annual sea lamprey assessments continue to show the success of the program where we recorded an average of 54 sea lamprey wounds per 100 lake trout and 15 per 100 Atlantic salmon in 2013. This is down from a high of 99 for lake trout in 2007 and 79 for Atlantic salmon in 2003. Several control initiatives are underway that will further reduce the sea lamprey population and reduce their impacts on Lake Champlain’s fish populations.

Larval sea lamprey live in rivers and on deltas for about four years before transforming to their parasitic phase and emigrating to Lake Champlain where their effect on the fishery becomes apparent. One of the Cooperative’s Integrated Pest Management approaches is to apply selective pesticides (lampricides) to rivers and deltas in prescribed and precise concentrations. The concentrations used are carefully chosen and monitored to ensure effective elimination of sea lamprey larvae and protection of non-target species. TFM (3-trifluoromethyl-4-nitrophenol) will be applied in the rivers for 12-14 hours depending on environmental conditions.

A second lampricide, Bayluscide 20 Emulsifiable Concentrate, may be included in the application on the Boquet River. The use of 1 Bayluscide with TFM reduces the amount of TFM needed by about 40, resulting in a reduction of total lampricide applied and substantial cost savings.

Temporary water use advisories will be in effect for each of the treatments to minimize human exposure to affected waters. Each state’s Department of Health recommends that the treated river and lake water not be used for drinking, swimming, fishing, irrigation, or livestock watering while the advisories are in effect.

The treatments and water use advisories will have no effect on most residents in the Champlain Basin. Cooperative staff have identified all landowners with property in the affected areas. A letter was sent to residents informing them of the planned treatment and asking them if they or their livestock use water from a surface supply that will be affected by the treatment. Days before the treatments begin, another letter will be sent to inform residents of the impending treatment and to arrange any water usage accommodations.

Local television and radio stations will be provided with dates when advisories begin and expire. The treatment schedule is subject to change as weather conditions, stream flows, or logistical issues may arise during the treatments. Residents will be kept apprised of any such changes through these media. Communities and residents that utilize the following bodies of water should consult the advisory table.

The toll-free number (1-888-596-0611) provides information on the treatment schedule for each of the treatments, progress reports, updates on treatments, and water use advisories.

WATER USE ADVISORY AREAS

Streams:

Boquet River, NY

Salmon River, NY

Little Ausable River, NY

Ausable River, NY

Great Chazy River, NY

Lewis Creek, VT

Delta Areas:

Boquet

Salmon

Ausable/Little Ausable

Saranac

Contact: Bradley Young, USFWS, (802) 872-0629 x19

Source: Department of Fish and Wildlife
Last Updated at: August 26, 2014 13:39:04
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