Navigation Links
Underwater CO2 shows potential as barrier to Asian carp
Date:1/23/2013

URBANA As the Asian carp population grows and the threat of the invasive species entering Lake Michigan through one of the Chicago canals is monitored, a University of Illinois researcher believes using two barrier methods is better than one.

Cory Suski experimented with adding carbon dioxide (CO2) into the water as a supplemental tool to work in tandem with the electric fence, which has been used to divert the carp from entering the canal, with the goal of providing a second line of defense.

Suski found that carbon dioxide is quick and effective in repelling fish from an area.

"In one experiment using tanks, we could actually chase the fish with the gas," Suski said. "Once carbon dioxide reached a threshold, fish would 'choose' to leave the area of the tank that had CO2. The fish initially showed signs of being irritated or agitated after exposure, and eventually they lost equilibrium. If fish cannot leave or are slow to leave the carbon dioxide accumulates to a point where it will act like an anesthetic gas used for patients who are undergoing surgery."

Suski knew that CO2 had already been proven to be effective at fish hatcheries. The CO2 was used to move fish from one area to another, making it easier to harvest them. He wanted to see if the technique could be applied to the Chicago River canals and at other vulnerable entry points into the Great Lakes.

In addition to studies quantifying behavior and stress physiology in response to CO2, Suski used a laboratory tank called a shuttle box that contains two chambers and a connecting canal. The level of carbon dioxide can be controlled on either side of the box. Tests were performed on bighead carp and silver carp as well as bluegill and largemouth bass so the effects on native species of fish could be confirmed. CO2 had the same effect on all four species.

"What we learned is that CO2 does not appear to be species specific," Suski said. "This is good because there are other species besides Asian carp that we don't want swimming back and forth between the river and the Great Lakes. The electric fence is also a non-species-specific barrier, and all non-physical barriers have weaknesses. The CO2 barrier isn't intended to replace the electric fence. It's another tool, a redundant barrier that further increases the likelihood of stopping fish from getting through," he said.

Because carp are known to jump, Suski was prepared for the possibility that the carp would try to jump out of the shuttle box to escape the carbon dioxide. "We covered the tanks to keep them contained, but they didn't jump," he said.

Suski also conducted an experiment on a larger scale in a small, outdoor pond about 40 feet by 30 feet but without fish. "We wanted to see how easy it would be to put CO2 into a lot of water," Suski said. "As it turned out, it's shockingly easy. We did it with a hose and a gas source and just bubbled it in."

Suski said the next step will be to test it in the field on a larger scale, determining the costs and the effect it may have on non-target species and on the environment. The elevated CO2 makes the water slightly more acidic so Suski wants to learn how the higher acidity affects fish, the water, and other organisms.

"What we're working on right now is seeing how effective CO2 is on small fish," Suski said. "In theory, CO2 could eliminate all fish from an area, regardless of their size, whereas we know that for small fish, 1 to 3 inches, the electrical barrier becomes less effective. If smaller fish don't like the CO2 and choose to swim away, that's a potential shortcoming of the electrical barrier that CO2 can address."

According to Suski, Asian carp grow rapidly and totally disrupt the food chain. All fish depend upon zooplankton (small animals) and phytoplankton (small plants) when they are very small. "Asian carp eat these items that the other fish and other aquatic organisms depend upon, thus pulling the rug out from the bottom of the food chain," Suski said.

Suski said Asian carp are already in the Mississippi River all the way up to Minnesota as well as in South Dakota.

"Once they get into the Great Lakes, there is concern that they could do well there and further spread to other canals throughout eastern North America," Suski said.


'/>"/>
Contact: Debra Levey Larson
dlarson@illinois.edu
217-244-2880
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert  

Related biology news :

1. NOAA: Underwater noise decreases whale communications in Stellwagen Bank sanctuary
2. Specialization for underwater hearing by the tympanic middle ear of the turtle
3. TGen, Scottsdale Healthcare study shows drug combination extends pancreatic cancer patient survival
4. Abortions are safe when performed by advanced practice nurses and physician assistants, study shows
5. Fraunhofer shows bio-tiles and heat-resistant biopolymers
6. CU-led study shows pine beetle outbreak buffers watersheds from nitrate pollution
7. Stem-cell approach shows promise for Duchenne muscular dystrophy
8. Rhythms in the brain help give a sense of location, study shows
9. Big brains are pricey, guppy study shows
10. New whole plant therapy shows promise as an effective and economical treatment for malaria
11. Penn Study shows resistance to cocaine addiction may be passed down from father to son
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Underwater CO2 shows potential as barrier to Asian carp
(Date:12/15/2016)... Calif. , Dec. 15, 2016   WaferGen ... publicly held genomics technology company, announced today that on ... Listing Qualifications Department of The Nasdaq Stock Market LLC ... closing bid price of WaferGen,s common stock had been ... Accordingly, WaferGen has regained compliance with Listing Rule 5550(a)(2) ...
(Date:12/15/2016)... AUBURN HILLS, Mich. , Dec. 15, 2016 /PRNewswire/ ... simply unlocking car doors or starting the engine. Continental ... 2017 in Las Vegas . Through ... PASE (Passive Start and Entry) and biometric elements, the ... the field of vehicle personalization and authentication. ...
(Date:12/8/2016)... Dec. 8, 2016 Market Research Future published a half ... global Mobile Biometric Security and Service Market is expected to grow ... Market Highlights: ... , Mobile Biometric Security and ... the increasing need of authentication and security from unwanted cyber threats. ...
Breaking Biology News(10 mins):
(Date:1/18/2017)... ... January 18, 2017 , ... Researchers from a new study are stating ... low enough after prostate cancer treatment, this indicates there is still remaining prostate cancer cells ... , “ The PSA test has always been an indicator of whether a man’s prostate ...
(Date:1/18/2017)... ... January 18, 2017 , ... BidMed, ... sell research and genetic testing lab equipment from two different leading institutes. This highly ... Northeast regions of the United States. This 1-day online auction will take place ...
(Date:1/18/2017)... ... January 18, 2017 , ... Thirty-six startup companies in ... by the Pennsylvania Department of Community and Economic Development in 2016 as part of ... in the University City Keystone Innovation Zone and represent the highest number of awards ...
(Date:1/18/2017)... SAN DIEGO , Jan. 18, 2017  HUYA ... development of China,s pharmaceutical innovations, ... Academy of Sciences Innovation and Investment Company (referred to ... and commercializing biomedical innovations discovered by leading scientists at ... the world. HUYA is the first company ...
Breaking Biology Technology: