Researchers from the Minnesota Aquatic Invasive Species Research Center periodically present on their research findings via webinar. View recent webinars below, and stay tuned for more in the future!
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AIS Surveillance and Watercraft Inspections
Aquatic invasive species (AIS) managers are tasked with preventing the spread of many AIS moving through highly complex and interconnected systems, often with limited resources to do so. Using a data-driven approach to identify and prioritize waterbodies at the highest risk of invasion can help inform effective and efficient programs. To that end, we have created the Minnesota AIS Explorer, an online user-friendly decision support tool for local and state managers.
Zebra mussel suppression
Zebra mussels (Dreissena polymorpha) are one of the most problematic invasive species in Minnesota, causing significant ecological and economic impacts in waterbodies where they have established. The Minnesota Aquatic Invasive Research Center (MAISRC) has partnered with the U.S. Geological Survey (USGS) to develop zebra mussel suppression strategies that will reduce ecological and economic impacts to infested waterbodies and reduce the risk of spread to uninfested waterbodies. This project built on several years of promising research, culminating with the largest scale low-dose/long-duration treatment ever attempted. Considerable efforts were made to test the effectiveness of the treatment on zebra mussels, as well as potential non-target impacts on a variety of vertebrate and invertebrate animals and water quality parameters. The pre- and post-treatment monitoring was robust and included extensive sampling in St. Albans (EarthTec QZ treated) and Robinsons (untreated control) Bays. Preliminary results suggest that treatments effectively reduced zebra mussel veliger density, juvenile zebra mussel recruitment, and live zebra mussel density. Non-target impacts varied and will be presented.
We estimate willingness to pay for local aquatic invasive species lake management in the form of a daily lake access fee by conducting summer lake surveys in Minnesota, USA. We also examined recreationists’ visit motivation, and aquatic invasive species perceived risk, knowledge, and awareness of problem. We estimate mean willingness to pay to be $10.41 per day, which did not differ significantly by lake. Perceived risk, awareness of problem, and visit motivation were significant in predicting willingness to pay, which could have important ramifications for aquatic invasive species management. All questions that were asked during the live session were saved and answered by Dr. Levers and Dr. Pradhananga in this document.
When anglers fish on a lake infested with spiny waterflea, they risk leaving the lake with infested gear. In this study, we tested a variety of common types of angling gear (fishing lines, livewells, bait buckets, anchor ropes, downriggers) in Lake Mille Lacs and Island Lake Reservoir. We measured the number of spiny waterflea that become ensnared on the gear, and how ensnarement rate is affected by natural lake density and time of day. Learn what you can do to help stop the spread of spiny waterflea! View the webinar's full Q & A document.
Common carp control
Common carp are one of the most widespread invasive fish globally. In this talk, Przemek Bajer, a MAISRC Research Assistant Professor presents a brief history of common carp introductions around the world, explains their impacts on lake ecosystems and shows some of the new and innovative tools we use in carp management. These tools will include autonomous systems for removing carp during spawning migrations, and conditioning strategies that exploit carp’s social behaviors to train them with food and remove.