Fish Disease Spreads to New Waters

  • The external bleeding on this freshwater drum fish is a result of VHS. The disease is spreading beyond the eastern Great Lakes region. (Photo by John Lumsden, University of Guelph)

A virus that’s been killing fish in the Great Lakes is spreading to
other waterways in the US. Chuck Quirmbach reports:

Transcript

A virus that’s been killing fish in the Great Lakes is spreading to
other waterways in the US. Chuck Quirmbach reports:


Viral hemorrhagic septicemia has been limited to the eastern Great
Lakes region, but now it’s gotten into a forty-mile long lake in
Wisconsin. Lake Winnebago draws anglers from a wide area.


Mike Schmal is a local tourism official. He says the fish-killing
virus could be very disruptive.


“There’s numerous bait shops and numerous businesses that depend on the
lake and this is our summer leisure season… when the boating season
begins and when sportfishing begins.”


Scientists say it appears to be impossible to get the virus out of
infected waters, so natural resource officials are trying to stop VHS
from being spread to more lakes and rivers in other states.


It’s not clear how VHS got into the US, though contaminated
ballast water from international ships is one possibility.


For the Environment Report, I’m Chuck Quirmbach.

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Virus Spreads to More Fish & Waters

A disease that’s killing fish in the Great Lakes region is spreading;
and, as Richie Duchon reports, it’s infecting more and more species:

Transcript

A disease that’s killing fish in the Great Lakes region is spreading;
and, as Richie Duchon reports, it’s infecting more and more species:


The disease is called Viral Hemorrhagic Septicemia, or VHS. It weakens
fish immune systems, and they often die of organ failure and internal
bleeding.


Gary Whelan is with the Michigan Department of Natural Resources. He
says the disease is here to stay:


“We cannot stop the disease. That’s very unlikely. It will continue
to spread. But we certainly can try to keep it out of sensitive fish
populations and out of inland lakes to our best that we can.”


Whelan says that includes not moving fish or water from lake to lake.
Just last month, VHS was confirmed in two popular sport fish in Lake
Huron.


Whelan says the virus could make it to Lakes Michigan and Superior this
year.


For the Environment Report, I’m Richie Duchon.

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Fish Disease Prompts Ban on Ballast Water

An emerging fish disease known as viral hemorrhagic septicemia, or VHS, has prompted a proposed ban on the use of ballast water in the Great Lakes. Chuck Quirmbach reports the proposed ban is leading to predictions of economic disruption:

Transcript

An emerging fish disease known as viral hemorrhagic septicemia, or VHS, has prompted a proposed ban on the use of ballast water in the Great Lakes. The proposed ban is leading to predictions of economic disruption. Chuck Quirmbach reports:


The US Government has put temporary limits on the shipments of live fish from the great lakes states. That’s because of a virus in some great lakes waters that is fatal to fish. The state of Michigan says a better way to prevent that virus from spreading is to ban freshwater ships from taking in ballast water from the lakes that are contaminated.


Jim Weakley is president of the Lake Carriers Association. He says ships couldn’t operate if they couldn’t take on ballast.


“You’re talking about shutting down the movement of iron ore, coal, limestone, cement, salt; all the products we move that keep the manufacturing basis of this area moving.”


Environmental groups support the proposed ban on ballast water intake, saying ballast transfers move around a lot of unwanted species.


For the Environment Report, I’m Chuck Quirmbach.

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Great Lakes Fish “Quarantined” by Usda

Regulators are worried about a fish disease found in the lakes that could spread to other areas. Federal officials are trying to figure out the next step after banning certain shipments of fish in the Great Lakes Region. Dustin Dwyer has more:

Transcript

Regulators are worried about a fish disease found in the lakes that could spread to other areas. Federal officials are trying to figure out the next step after banning certain shipments of fish in the Great Lakes Region. Dustin Dwyer has more:


The disease is called viral hemorrhagic septicemia. It can cause fish to bleed internally and die.


The disease is harmless to humans, but federal regulators say it could lead to massive die-offs for up to 37 different species of fish, so they’ve stopped fisheries in the eight Great Lakes states, and two Canadian provinces from shipping those species over state lines. The ban only affects live fish.


Jim Rogers is a spokesman with the US Department of Agriculture. He says the ban is meant to stop the spread of the disease while officials figure out what to do next.


“Now eventually that federal ban is going to lift, and we are going to be allowing movement. But right now we just can’t do it with the threat of this disease hanging over us.”


The fishing industry in the Great Lakes has been valued at more than $4 billion a year.


For the Environment Report, I’m Dustin Dwyer.

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New Fish Virus Becoming Long-Term Threat?

Biologists are concerned a new fish virus may become an ongoing threat in the Great Lakes. The virus caused a fish die-off in Lake Ontario and the St. Lawrence River last month. The GLRC’s David Sommerstein reports:

Transcript

Biologists are concerned a new fish virus may become an ongoing threat in the Great Lakes.
The virus caused a fish die-off in Lake Ontario and the St. Lawrence River last month.
The GLRC’s David Sommerstein reports:


Viral Hemorrhagic Septicemia is common in saltwater fish in the Pacific Northwest,
but somehow the virus hopped into the freshwater fish of Lake St. Clair and Lake Ontario
last year. Then, last month, the virus killed hundreds of fish in the St. Lawrence River.
Scientists are trying to determine if the virus is a long-term threat to the Great Lakes
fishery:


“You know, that’s kind of the million dollar question.”


John Farrell directs the Thousand Islands Biological Station. He says many
fish species may become infected with the virus but not show symptoms:


“They may serve as a reservior for the virus. There’s a potential
that the virus could cycle over time, but may be with us for a long time to come.”


Conservation officials are most worried about muskies, trout and salmon – native
fish that anglers love to catch.


For the GLRC, I’m David Sommerstein.

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