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Print

Fears mount over giant carp reaching Great Lakes

December 02, 2009 at 05:00 PM

Associated Press Writer

CHICAGO (AP) - CHICAGO (AP) - Fears that giant, voracious species of carp will get into the Great Lakes and wipe out other fish have led to rising demands that the government close the waterway connecting the lakes to the Mississippi River - an unprecedented step that could disrupt the movement of millions of tons of iron ore, coal, grain and other goods.

The dispute could become an epic clash of competing interests: commerce, environmentalists and fishermen.

Michigan Gov. Jennifer Granholm and five environmental groups threatened Wednesday to sue the U.S. Army Corps of Engineers to force it to temporarily shut three shipping locks near Chicago because of evidence that Asian carp may have breached the electrical barrier that is supposed to hold them back from the lakes.

The environmental groups went further than the governor and said the Great Lakes and the Mississippi should be permanently separated to avert what Granholm called “ecological disaster.”

Col. Vincent Quarles, commander of the Corps’ Chicago district, said the agency is considering all options but would not close the locks without first studying the possible effects.

Environmentalists fear the fish, which consume up to 40 percent of their body weight daily in plankton, could starve out smaller and less aggressive competitors and cause the collapse of the $7 billion-a-year Great Lakes sport and commercial fishing industry.

The carp - which can grow to 4 feet long and 100 pounds and are known for leaping out of the water when boats are near - were imported by Southern fish farms but escaped into the Mississippi in large numbers during flooding in the 1990s and have been making their way northward ever since.

The Mississippi and the Great Lakes are connected by a complex, 250-mile network of rivers and canals engineered more than a century ago. It runs from Chicago, on the southern edge of Lake Michigan, to a spot on the Mississippi just nor th of St. Louis.

The American Waterways Operators, a trade association representing the tug and barge industry, said closing the locks would lead to higher shipping costs because commodities would have to be sent overland via truck or train across Illinois before being put back onto vessels.

“The impact is going to be large,” said Lynn Muench, the group’s senior vice president for regional advocacy in St. Louis. “It could definitely impact day-to-day living.”

Tens of millions of tons of goods are moved annually along the shipping canals or through the locks that lead into Lake Michigan. Muench had no estimate of the value of the cargo, which includes salt, sugar, molasses, cement, scrap metal and petroleum.

In the continuing struggle to keep the fish out, Illinois environmental officials began dumping poison Wednesday night in a nearly six-mile stretch of the Chicago Sanitary and Ship Canal near Lockport to kill off the carp while the electrical barri er is turned off for maintenance.

Chief Petty Officer Robert Lanier of the U.S. Coast Guard said workers began dumping a fish toxin called rotenone into the canal about 8 p.m. and would continue the poisoning until some time Thursday morning. Crews then planned to use large cranes with nets to scoop up an estimated 200,000 pounds of dead fish, which will be taken to a landfill.

The electrical barrier, installed in 2002 to repel fish with a non-lethal jolt, has long been the only thing standing between the carp and Lake Michigan, the gateway to the four other lakes. But officials said two weeks ago that DNA from Asian carp had been found between the barrier and one of the locks near the lake. No actual carp have been found in Lake Michigan.

Environmentalists and Granholm said the locks should be closed while the scope of the problem is established.

“This is an immediate threat to the Great Lakes, to our sport and commercial fishery, and as such it requ ires some emergency actions appropriate to the level of that threat,” said Ken DeBeaussaert, director of Michigan’s Office of the Great Lakes. “Closing the locks to prevent the possible spread of the Asian carp into the Great Lakes is an appropriate response on an emergency basis.”

The environmental groups also said the government should find a way to permanently separate - through physical barriers or other means - the Great Lakes and Mississippi watersheds so the invasive species has no way of passing between the two.

Last fall, environmental groups offered several possible solutions, including erecting concrete walls, constructing more locks, even lifting barges over the locks.

The issue “takes on a whole new urgency because of the Asian carp emergency,” said Andy Buchsbaum of the National Wildlife Federation. “We don’t know where the carp are, and the risk of their being in the canals is too great.”

Some fishing enthusiasts doubt the government wi ll consider closing the locks. Dan Thomas, president of the Elmhurst, Ill.-based Great Lakes Sport Fishing Council, said too many industries and too many jobs would probably be affected.

“Ideally it’s the way to go, but many things that are ideal don’t always come to fruition because there are too many other circumstances,” he said. “They can still be contained, but only with concerted effort and a sense of urgency to do what is necessary on a timely basis.”

Scientists say more than 180 invasive species have entered the Great Lakes, multiplying rapidly and feeding on native species or competing with them for food. Millions of dollars have been spent trying to control the zebra mussel and the round goby fish, which already have moved between the Great Lakes and Mississippi River basins.

___

John Flesher reported from Traverse City, Mich.

Your CommentsComments :: Terms :: .(JavaScript must be enabled to view this email address)

That poison is Rotenone, and it’s being applied as we speak (Wednesday night, 12/2). I read an estimated cost of $2 Million for this procedure to temporarily remove all fish (native/non-native) from the immediate area for a few days while they repair the electric barrier. With the antedote applied downstream, the Rotenone will be effective for just a few days and the area should (emphasis on “should”) be recolonized relatively quickly. Not quite sure if it’s worth $2M for 3 days of no carp, especially with the high probability that the carp have already passed the barrier in the first place.

Posted by .(JavaScript must be enabled to view this email address) on 12/02 at 07:17 PM

Rotenone kills all the fish,crawfish,ect.. not just carp. This could get out of control real easy.

Posted by .(JavaScript must be enabled to view this email address) on 12/02 at 09:15 PM

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