Aquatic Invasive Species Articles
- Rusty Crayfish: A Nasty Invader
- Rusty crayfish have invaded portions of Minnesota, Wisconsin, Ontario, and many other areas. Although native to parts of some Great Lakes states, rusty crayfish have spread to many northern lakes and streams where they cause a variety of ecological problems.
- Invasive Crayfish Discovered in St. Louis Bay
- Rusty crayfish were found for the first time in the Duluth-Superior Harbor this summer.
- How Didymo Became Rock Snot
- From New Zealand to North America, the single-celled silica-shelled didymo is reviled as "rock snot", and aquatic ecologists speculate that a subtle change in the algae's behavior has taken place allowing the species' range expansion. Read about the paradox didymo presents aquatic ecologists.
Genetic Biocontrol Articles
- Publication Trifecta Examines Genetic Biocontrol of Invasive Fish
- Scientific advances make genetic engineering a reality, but that does not make it supported by current U.S. governance and framework. Three Sea Grant publications recently explored the topic.
- Genetic Biocontrol - The Future of Managing Invasive Fish?
- Symposium goers discussed genetic engineering as a tool for controlling invasive fish. Invited speakers included Australians working on the Daughterless Carp Program.
- Round Gobies Invade North America
- The round goby was discovered in the St. Clair River, the channel connecting Lake Huron and Lake St. Clair, in 1990. Since then, they have been found in the Great Lakes and are increasingly threatening navive species and ecosystems.
- The Aggression and Progression of Round Gobies
- Round Gobies are like the "playground bullies" in our lakes and streams. Find out how they operate.
- Tubenose Goby “Leaps” to Duluth/Superior
- An exotic tubenose goby was found in the Duluth Superior Harbor in April 2001. This is the species' first documented leap significantly beyond the St. Clair River.
- Goby Population Found in Duluth-Superior Harbor
- Two Superior, WI, teenagers discovered a thriving population of round gobies (Neogobius melanostomus), an exotic fish, in the Duluth-Superior harbor this summer.
In the Classroom
- Highschoolers Write about Eurasian Species
- Behold the winners of our recent essay contest for young adults and excerpts from their essays about aquatic invasive species.
- Escaping Classroom Routines with Exotic Species
- Game boards, rap music, art, puzzles and experiments are just a few of the fun and informative activities created for K-12 classrooms in ESCAPE (the Exotic Species Compendium of Activities to Protect the Ecosystem). The compendium is part of a Sea Grant-sponsored campaign to teach young people about exotic species issues and help them explore ways to solve real-world problems.
- Sea Lamprey: The Battle Continues
- Sea lamprey have caused significant damage to the Great Lakes. Learn about sea lamprey, their impacts on the fishery and various methods that have proven remarkably successful in controling sea lamprey populations over the years.
- Lake Superior’s Native Lampreys
- Lake Superior's native lampreys aren't bad, they're just ugly. Learn about three secretive lamprey species that have lived in the lake's tributaries for thousands of years.
- Marketing Lamprey in Europe: A Good News/Bad News Story
- The good and the bad news about marketing lamprey in Europe were presented at a seminar held at the Great Lakes Science Center in Ann Arbor, MI, in June.
- New Zealand Mudsnails Found in Duluth-Superior Harbor
- Egad! Tiny cloning snails are the newest invader in the Twin Ports.
- Zebra Mussels Threaten Inland Waters
- Zebra mussels were first discovered in the Great Lakes in 1988. Within one year, zebra mussels colonized nearly every firm object in Lake Erie. Zebra mussels quickly spread to all the Great Lakes. Expansion to inland waters continues at an alarming rate.
- Quagga Mussel Population Found in Harbor
- The single quagga mussel found previously in the Duluth-Superior Harbor was just the tip of the iceberg of the population. Another invasive species, Chinese mitten crabs, have also shown up in Thunder Bay, Ontario.
- Major Zebra Mussel Infestation in Harbor Impacts Native Mussels, Boaters
- A diver looking for native mussels in the Duluth-Superior Harbor finds grim conditions due to an infestation of zebra mussels.
- Zebra Mussels “Pulse” in Duluth-Superior Harbor
- The zebra mussel population in a Lake Superior harbor has increased, raising concerns over impacts on industries and the environment.
- Purple Loosestrife: What You Should Know, What You Can Do
- Purple loosestrife is a very hardy perennial which can rapidly degrade wetlands, diminishing their value for wildlife habitat.
- Basic Instinct: Plant Chemicals Found that Attract Insect
- Too bad for Eurasian watermilfoil! The invasive plant smells delicious to a hungry species of weevil and now scientists know why.
- Water Garderners and Businesses Concerned About Invaders
- Find out what researchers learned in surveys of Minnesota plant customers and businesses about their aquatic invasive species awareness and gardening practices.
- Mail-Ordering Aquatic Plants Can Be Dangerous
- Buyers beware. University of Minnesota researchers found that 93 percent of mail-ordered aquatic plants contained unwanted species and 93 percent of orders they placed for illegal plants were filled.
- Where Have All the Purple Flowers Gone?
- Efforts by volunteers to control the exotic plant purple loosestrife along the St. Louis River with imported beetles seems to be working.
- Preparing for Purple Eaters
- We co-hosted a new youth program this spring to help combat the spread of an invasive plant, purple loosestrife.
- Ruffe: A New Threat to Our Fisheries
- The ruffe (pronounced rough), is a small but aggressive fish species native to Eurasia. It was introduced into Lake Superior in the mid-1980s in the ballast water of an ocean-going vessel.
- Luring Ruffe with Smell
- Female ruffe approaching ovulation release a pheromone in their urine that attracts males. Researchers believe this discovery could be applied to control this invasive fish.
- The Smell of Fear: Ruffe “Alarm” Pheromones
- University of Minnesota researchers have found that Eurasian ruffe, an exotic fish, produce a repellant smell. These pheromones could be used to reduce the spread of ruffe in the Great Lakes.
- “Bond-Cold Café” Suits Ruffe
- A Sea Grant study has shown that the Eurasian ruffe's metabolism enables this invasive fish to thrive in the cool water of the St. Louis River. The study also indicates that temperature affects the growth of ruffe less than yellow perch that ruffe need more food than perch to survive.
- Big Snails, Small Pond
- Chinese mystery snails are fouling a Duluth pond. You didn't put them there, did you? Help stop the spread of invasive species.
- Spiny Waterfleas Found in Rainy Lake
- An Eurasian zooplankton that invaded the Great Lakes has arrived in one of Minnesota and Ontario's most popular fishing destinations.
- Our Lake Has Fleas
- Lake Superior is swarming with fleas. At least 36 species of cladocerans, or waterfleas, reproduce in the lake and it looks like a 37th is on its way.
- Non-native Species in Lake Superior
- A comprehensive listing of non-native species in Lake Superior, including statistics on why and how they are in the Lake.
- A Field Guide to Aquatic Invaders
- This guide is designed to help water recreationalists recognize these exotics and help stop their further spread.
- Boat Washing Stations - Palliative or Cure?
- Learn about permanent and portable boat-washing stations and the results of case studies attesting to their effectiveness.
- Repel the Invaders
- It's virtually Lake Superior and interactively fun. Read about a new animated product developed at the Viz Lab, University of Minnesota Duluth./dd>
- Invasive Species Management is People Management
- The Minnesota Invasive Species Conference grappled with non-native species disturbing the state's terrestrial and aquatic ecosystems. Read about the topics, the people, and the activities that made this first-ever conference a resounding success.
- Coming Soon: A Statewide Invasive Species Management Plan
- Minnesota agencies and organizations are cooperating on a plan to combat invasive species.
- How did an Amazon River fish end up in a Minnesota lake? Read the saga and learn about what you can do during Minnesota's Invasive Species month.
- Habitattitude™ Hopes to Stem Releases of Aquatic Plants and Fish
- The U.S. Fish and Wildlife Service, the Pet Industry Joint Advisory Council, Sea Grant, and other partners promote a "don't release" message to aquarium owners and water gardeners through a national public education campaign.
- Two Exotic Species Projects Funded
- $286,200 is allocated for reaching water gardeners, shoreland owners, the aquarium industry and their hobbyist consumers with information about aquatic invasive species.
- Workshops Benefit from New Training Video
- A 22-minute video is available to help public fish hatchery operators, fish farmers, and bait harvesters take measures to prevent spreading aquatic nuisance species through their activities.
- Force of 3 to Cooperate on ANS Food Web and Fisheries Issues
- The Great Lakes Fishery Trust, the Great Lakes Sea Grant Network, and the Great Lakes Fishery Commission have joined forces to address the impact of aquatic nuisance species on the Great Lakes food web and on sport and commercial fisheries.
- New Exotic Species Projects Funded
- The National Sea Grant College Program awarded Minnesota Sea Grant $246,000 for three projects, all of which will be conducted in cooperation with other Great Lakes Sea Grant Programs over the next two years.
- Lights, Camera, Exotics!
- We are working on a 10-minute boater education video about exotic plants and animals. The clean boating message will be delivered by John Ratzenberger (a.k.a. Cliff Clavin of the television show, "Cheers").
- Aquatic Exotics: Highlights of the Ninth International Zebra Mussel and Aquatic Nuisance Species Conference
- From repellent chile pepper paint to attractant lamprey scents, find out what over 400 participants of this annual conference heard about aquatic nuisance species research in Duluth last April.
- Ballast Water Filtering Project Comes to Minnesota
- You've heard the story: many of our exotic species - Eurasian ruffe, round gobies, and zebra mussels - apparently hitched a ride on ocean-going vessels, hiding in the ship's ballast water and then gained a foothold in the Great Lakes after the water was released. If Allegra Cangelosi of the Northeast Midwest Institute and Richard Harkins of the Lake Carriers Association succeed, aquatic organisms may no longer get such an easy ride from their homes in Europe to America.