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CONFERENCE SCHEDULE UPDATES & CHANGES: As a result of the prolonged government shutdown, we experienced a number of cancellations and changes to the schedule. Cancellations and changes are listed here (as of January 26, 2019). 

Tuesday, January 29 • 10:40am - 11:00am
(CANCELLED) (SYMPOSIA-09) Development of Carbon Dioxide as a Tool for Invasive Fish Management

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AUTHORS: Aaron Cupp, U.S. Geological Survey; David Smith, U.S. Army Corps of Engineers; Cory Suski, University of Illinois; Kim Fredricks, U.S. Geological Survey

ABSTRACT: Carbon dioxide (CO<sub>2</sub>) is being developed as a new fisheries control chemical. Several recent studies have demonstrated that fish consistently avoid areas of elevated CO<sub>2</sub> when given access to other freshwater sources. Results from these studies suggest that resource managers could apply CO<sub>2</sub> at pinch-point or other key management locations within rivers to block upstream migration of invasive fishes (e.g. Asian carps, sea lamprey, round goby). A full-scale demonstration of this deterrent technology is being planned for 2019 at a navigational lock to better determine the costs, effectiveness, safety and overall feasibility of CO<sub>2</sub> as a fish deterrent method. In addition to using CO<sub>2</sub> as a behavioral deterrent, other recent studies have also demonstrated that CO<sub>2</sub> is an effective non-selective piscicide (fish toxicant). Carbon dioxide injected under-ice using various delivery methods was effective at reducing the overwinter survival of several non-native cyprinids. Further development of CO<sub>2</sub> as a piscicide could give managers an inexpensive, safe, and effective method to control invasive fish populations. Results from previous studies using CO<sub>2</sub> as a behavioral deterrent and piscicide will be discussed with specific focus on upcoming field studies aimed at transitioning CO<sub>2</sub> into a useful management tool.

Tuesday January 29, 2019 10:40am - 11:00am

Attendees (6)