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  Sea Lamprey
in the Great Lakes Region

What's New | Overview | General Resources | Related Resources
Current invaders:
Crustaceans: Rusty Crayfish | Spiny Water Flea
Fish: Goby (Round) | Goby (Tubenose) | Rudd | Ruffe | Sea Lamprey | White Perch
Mollusks: Quagga Mussel | Zebra Mussel
Plants: Curly-leaf Pondweed | Eurasian Watermilfoil | Phragmites (non-native) | Purple Loosestrife
Viruses: Viral Hemorrhagic Septicemia Virus (VHSv)
Potential invaders:
Fish: Asian Carp

[Invasive species home page]

What's New
Sea lamprey search comes to Conneaut
The Star Beacon (8/8)
Experts with the U.S. Fish and Wildlife Service will be in Conneaut, Ohio this month to gauge its sea lamprey population.

Sea lamprey survey planned for Muskegon River in Muskegon County
MLive (7/23)
A U.S. Fish and Wildlife Service assessment crew will survey the Muskegon River in Muskegon County, Mich., this summer to determine how many sea lampreys are in the river.

The sea lamprey: Vampire of the Great Lakes
Northland's News Center (7/11)
Lurking in the waters of the Great Lakes is a parasite that forever changed the native ecosystem. The saw-toothed suckers were introduced into the Great Lakes over a century ago.

Feds to see if invasive sea lamprey is in Portage River
Port Clinton News Herald (6/11)
Federal wildlife officials will search parts of the Portage River in Ohio this month to determine whether the invasive, parasitic lamprey has established a population there.

Controlling the Sea Lamprey population
WLUC TV6 - Negaunee, MI (6/3)
In a collaborative effort between many groups across the Great Lakes States and even Canada, the U.S. Fish and Wildlife Service attempts to stop the sea lampreys increase their numbers.

Crews to survey St. Clair River for sea lampreys
The Detroit News (5/18)
Sea lampreys look alien, and Jim Frazer had a close encounter of the worst kind with one last weekend during the Port Huron Spring Fling salmon fishing tournament

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Sea lamprey (Petromyzon marinus) are predaceous, eel-like fish native to the coastal regions of both sides of the Atlantic Ocean. They entered the Great Lakes through the Welland Canal about 1921. They contributed greatly to the decline of whitefish and lake trout in the Great Lakes. Since 1956, the governments of the United States and Canada, working jointly through the Great Lakes Fishery Commission, have implemented a successful sea lamprey control program.
This series of pictures shows a close-up of a lamprey's mouth, lampreys attached to a lake trout, and the damage resulting from a lamprey attack.
A lamprey mouthTwo lamprey on a living lake trout
Lamprey attached to troutDamage resulting from a lamprey attack

Photo Credit: 1 and 4: Great Lakes Sea Grant Network Exotic Species Graphics Library; 2: U.S. Fish and Wildlife Service; 3: Great Lakes Fishery Commission. For more photos, see the Sea Lamprey Fishtank.
References: A Field Guide to Aquatic Exotic Plants and Animals, University of Minnesota Sea Grant Program

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General Resources
Lampricide Reduction: A High Priority in the Sea Lamprey Battle
(PDF - page 4)

From Ohio Sea Grant's Twine Line
The Great Lakes Fishery Commission and its agents decided several years ago to reduce lampricide use by 50 percent by the year 2001, for three main reasons: commitment to healthy ecosystems, economics, and the need to integrate the pest management program. The commission is more than half way to reaching this reduction goal.

Petromyzon marinus
U.S. Geological Survey (USGS)
Nonindigenous occurrences, means of introduction, and impact of the Sea Lamprey.

Sea Lamprey
University of Wisconsin Sea Grant Institute
This fact sheet gives a brief description of the sea lamprey.

Sea Lamprey (Petromyzon marinus)
Sea Grant Nonindigenous Species Site (SGNIS)
Includes scientifically reviewed articles as well as images from Sea Grant researchers.

Sea Lamprey Control Program
Great Lakes Fishery Commission
The GLFC's program of integrated sea lamprey management includes lampricide control, construction of barriers in streams to deny sea lampreys' entry, and an experimental program to reduce spawning success by releasing sterilized-male sea lampreys. The program has successfully allowed the re-emergence of the largest freshwater fishery in the world.

Sea Lamprey Factsheet
U.S. Geological Survey (USGS), Great Lakes Science Center
Outlines the impacts of Sea Lamprey populations in the Great Lakes, research and treatments to protect native fish populations.

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Related Resources
GLIN: Agencies and Organizations, Fauna
GLIN: Fish and Fisheries in the Great Lakes Region

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Updated: August 20, 2014
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Selected Photos: Copyright ©John and Ann Mahan
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