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Minnesota Aquatic Invasive Species Research Center (MAISRC)

Persistent link for this communityhttps://hdl.handle.net/11299/197773

The Center's mission is to develop research-based solutions that can reduce the impacts of aquatic invasive species in Minnesota by preventing spread, controlling populations, and managing ecosystems; and to advance knowledge to inspire action by others. MAISRC's vision is to be a vibrant and durable research enterprise that advances the knowledge and builds the capacity that Minnesota needs in order to reduce the impacts of aquatic invasive species on our cherished lakes, rivers, and wetlands. Visit MAISRC's website at https://www.maisrc.umn.edu/

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Browsing Minnesota Aquatic Invasive Species Research Center (MAISRC) by Author "Bajer, Przemyslaw G"

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    Data for A small native predator reduces reproductive success of a large invasive fish as revealed by whole-lake experiments
    (2022-01-10) Poole, Joshua R; Bajer, Przemyslaw G; bajer003@umn.edu; Bajer, Przemyslaw; University of Minnesota, MAISRC
    The extent to which native fish communities might control the success of invasive fish has been of interest to ecologists, but it has been rarely addressed using experiments. We conducted an experiment in six small lakes in the Upper Mississippi Region to test the effects of a small native predator, bluegill sunfish (Lepomis macrochirus) on the recruitment of a large, invasive fish, the common carp (Cyprinus carpio). Bluegills are predominant throughout the region and were previously shown to consume carp eggs and larvae. We stocked both lakes at each of our 3 sites with adult carp (spawners) and one lake at each site with bluegills. We repeated the experiment at two of the three sites for two consecutive years. In each lake we assessed the abundance of post-larval carp one month after spawning (backpack electrofishing surveys) and at the end of the season (mark-recapture). For each site/year combination, catch rate of post-larval carp was typically an order of magnitude higher in control than bluegill lakes, but it often declined quickly over time. The abundance of end-of-seasonal juveniles was significantly higher (no 95% CI overlap) in control lakes than in bluegill lakes, except for one pair of lakes during one year when both the control and bluegill lake had similar, low abundance of end-of-season carp. Overall, our results support the hypothesis that common carp recruitment is substantially reduced in habitats dominated by bluegills. We also suggest our results may be applicable to other species, and that managers should explore how predation on early life stages may control other invasive species.
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    Data from: Tests in a semi-natural environment suggest that bait and switch strategy could be used to control invasive Common Carp
    (2020-07-10) Hundt, Peter J; Amberg, Jon; Sauey, Blake; Vacura, Kristen; Bajer, Przemyslaw G; hundt002@umn.edu; Hundt, Peter J; Minnesota Aquatic Invasive Species Research Center
    Common Carp (Cyprinus carpio Linnaeus, 1758), is a highly invasive species that has had profound effects on biodiversity and ecosystem services. Many Carp management methods have been applied including physical removal, pesticide treatments of whole lakes, and water drawdowns. Herein, we tested key elements of a potential “bait and switch” approach in which corn could be used to induce feeding aggregations of Carp and then switched for corn pellets with a pesticide Antimycin-A (ANT-A) to selectively target the Carp. First, laboratory experiments were used to determine if addition of lethal concentrations of ANT-A to corn pellets deterred Carp from eating corn-based food pellets. Second, a pond experiment tested if a corn-based bait containing ANT-A functioned as a species-specific Carp management tool in a semi-natural environment with three common native fishes: White Sucker (Catostomus commersonii Lacepède, 1803), Yellow Perch (Perca flavescens, Mitchill, 1814), and Bluegill (Lepomis macrochirus Rafinesque, 1819). The use of baited sites by Carp and native species was monitored using passive integrated transponder (PIT) tags. Mortality of each species and presence of corn in their digestive tracts was also monitored.
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    Supplementary video recording of carp feeding aggregations at corn baited feeding sites in a nearby lake in New Brighton, Minnesota, USA
    (2021-06-22) Hundt, Peter J; White, Lauren A; Craft, Meggan E; Bajer, Przemyslaw G; hundt002@umn.edu; Hundt, Peter; University of Minnesota Minnesota Aquatic Invasive Species Research Center (MAISRC); College of Food, Agricultural and Natural Resource Sciences (CFANS); Department of Fisheries, Wildlife and Conservation Biology
    Supplementary video recording showing carp feeding as reference for the paper: Social associations in common carp (Cyprinus carpio): insights from induced feeding aggregations for targeted management strategies. Included is one video from 26 September 2018.