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As a result of the prolonged government shutdown, we’re expecting some presentation cancellations and will continue to update the schedule with changes as they occur.  Otherwise the conference will proceed as planned.  Current cancellations and changes are listed here.

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Tuesday, January 29 • 10:40am - 11:00am
(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