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!
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.
Hybrid watermilfoil, formed from the hybridization of the native northern watermilfoil (Myriophyllum sibiricum) and the invasive Eurasian watermilfoil (M. spicatum), has been present in Minnesota for over 20 years. Surveys in 2017 and 2018 documented hybrid watermilfoil in 28 of 62 lakes surveyed. Eurasian was found in 43 lakes. Most Eurasian populations were the same clone and only six genotypes were found, but hybrid watermilfoil was much more diverse; 51 genotypes of hybrid watermilfoil were noted. The concern with hybrid watermilfoil is that some genotypes may be more invasive or resistant to commonly used herbicide. This webinar provides updated results from 2019, including results from additional lakes and response to management activities in a set of intensively studied lakes. All questions were recorded during the webinar and answered by the researchers afterward. View the Q & A document here: z.umn.edu/HWMwebinarQandA
Starry stonewort impacts
Graduate student Carli Wagner presented her research on starry stonewort and its impacts on native plant communities. Carli also wrote out answers to the questions that were asked during the webinar: view the Q&A document here.
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.
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.
Managing invasive Phragmites
MAISRC researchers Dan Larkin, Chelsey Blanke, and Julia Bohnen presented their research on managing invasive Phragmites. The team also wrote out answers to the questions that were asked during the webinar: view the Q&A document here.
Spiny waterflea in Lake Mendota
MAISRC postdoctoral research fellow Jake Walsh presented the results of his study of the ecological and economic impacts of spiny water flea on Wisconsin’s Lake Mendota. Additional resources provided during the webinar can be found here.