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PLEASE NOTE: The schedule posted here is as of 1/25/16, and is subject to change. Please check back for updates.
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Wednesday, January 27 • 1:20pm - 1:40pm
The Impact of Elevated Carbon Dioxide (CO2) On Alarm Cue Behaviors In Fathead Minnows

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AUTHORS: John A. Tix*, University of Illinois Urbana-Champaign; Caleb Hasler, University of Illinois at Urbana-Champaign; Cody Sullivan, University of Illinois Urbana-Champaign; Jennifer D. Jeffrey, University of Illinois at Urbana-Champaign; Cory D. Suski, University of Illinois Urbana-Champaign

ABSTRACT: The spread of invasive species poses a serious threat to aquatic ecosystems. Previous research has shown that elevated CO2 impairs fish movement, thus making it a potentially powerful tool to block further movement of invasive fishes. However, at present, there are unknowns that need to be addressed prior to deploying CO2 barriers, such as impacts to non-target taxa. Recent work in the marine environment suggests that increased CO2 levels due to climate change can negatively affect a fish’s ability to detect predators, home to natal environments, and perform aerobically; thus, elevated CO2 may have equally negative impacts on freshwater communities, an area that remains understudied. The objective of our study was to quantify the impacts of elevated CO2 on fathead minnow Pimephales promelas alarm pheromone behaviors. Fathead Minnow behaviors associated with their response to a conspecific alarm pheromone were significantly impaired following exposure to elevated CO2 levels for at least 96 hours. Behaviors to the alarm pheromone did not completely re-establish after 15 days of returning fish to ambient CO2 levels. Potential impacts to non-target fishes following CO2 exposure in both short- and long-term are discussed further.

Wednesday January 27, 2016 1:20pm - 1:40pm EST