Carbon Dioxide as an Invasive Carp Lethal Control

Science Center Objects

Invasive Carp Control: Carbon Dioxide

Management agencies often rely on commercial harvest for invasive carp population control. Piscicides, or fish toxicants, are an alternative method that could supplement Integrated Pest Management plans to kill and remove large quantities of invasive carps in a relatively short period of time. This non-selective removal strategy could greatly improve removal efficiency, particularly where high abundances of invasive carps are present.

USGS scientist injecting a PIT tag into an Asian carp for identification during CO2 trials.

USGS scientist injecting a PIT tag into an invasive carp for identification during CO2 trials.

(Public domain.)

The goal of this project is to determine the efficacy of carbon dioxide (CO2) as an under-ice lethal control. Ice cover provides a temporary boundary between water and the atmosphere which is beneficial to hold CO2 in solution and sustain a lethal exposure. Studies have been conducted in laboratory and pond settings to quantify lethal concentrations across species and life stages. Results are intended to inform natural resource management decisions regarding the potential utility of CO2 for invasive carp population control.

Liquid CO2 supply tanks for field testing.

Liquid CO2 supply tanks for field testing.

(Public domain.)

Injecting CO2 under ice to evaluate its use as a lethal control method.

Injecting CO2 under ice to evaluate its use as a lethal control method.

(Public domain.)

Using a Van Dorn sampler to collect eDNA water samples during a lethal control CO2 trial.

Using a Van Dorn sampler to collect eDNA water samples during a lethal control CO2 trial.

(Public domain.)