Salmon Fishery on the Rocks

  • The Chinook salmon was initially introduced to the Great Lakes in the 1870s. Michigan, New York and Wisconsin reintroduced the Chinook salmon to the Great Lakes in 1966. (Photo courtesy of USFWS)

There’s a decision looming for Lake Huron that would have been unthinkable 10 years ago. The state must decide whether it should keep putting chinook salmon in the lake. The fish has been the driving force behind sport fishing in the Great Lakes. But the salmon’s future in the Upper Lakes is now questionable. Peter Payette reports:


It’s hard to overstate how drastically salmon transformed the Great Lakes after they were introduced more than 40 years ago.


Ed Retherford is a charter boat captain on Lake Huron.
He says in the old days on a weekend in Rockport he’d see cars with boat trailers backed up for a mile or two waiting to launch.
But that’s all gone now.


“You’d be lucky, except maybe for the brown trout festival, you’d be lucky to see twenty boats there on a weekend. It just decimated that area. You can imagine the economics involved.”


Chinook or king salmon practically disappeared from Lake Huron about seven years ago. Most of the charter boats are gone now because the kinds of fish that remain are just not as exciting to catch as salmon.


State officials figure little towns like Rockport lose upwards of a million dollars in tourism business every year without the fishery.

More about Chinook salmon from the DNR

A related Environment Report story

Ten Threats to the Great Lakes

Transcript

The salmon’s demise followed the disappearance of its favorite food, little fish called alewives. Scientists say there were too many salmon eating the alewives and problems lower down on the food chain caused by invasive mussels.


State fisheries biologist Jim Johnson says salmon would rather starve than eat something besides an alewife.


“So at first, the salmon went through a period of just being starved out. They didn’t have enough to eat. They wouldn’t switch to eating round gobies and they died of malnutrition.”


The changes in Lake Huron since have been significant.


Neither salmon nor alewives are native to the lake. And with them out of the way, native fish like walleye have come back.


The state continues to stock one and a half million Chinook salmon in Lake Huron every year.


But Jim Johnson says the walleye eat most of them. He says Lake Huron can’t support a big salmon fishery any more.


“It’s just not realistic. The lake doesn’t offer that and there’s nothing the DNR can do to change that.”


The question now is whether to stock any chinook salmon in Huron at all. Giving up on the most popular sport fish in the Great Lakes is hard to swallow but most people see the writing on the wall. So even if stocking continues, it will likely be a fraction of what it once was.


On the other side of the state, there are now worrying signs that the same fate might be in store for Lake Michigan.


There are lots of salmon in Lake Michigan today.


But charter boat captain Denny Grinold says something went wrong last fall. He says the big salmon, the four-year old fish that come up into the rivers to spawn in August, never showed up.


“You keep looking for ‘em. You keep looking for ‘em. You go out and you fish the patterns that you’ve fished in the past. Those large Chinook should be there and they just weren’t there.”


The warm water and lots of windy days last year might account for the missing fish. But research provides no comfort for the future.


The DNR has created a system of red flags to evaluate the conditions for salmon in Lake Michigan. These are based on things like how much food is available, the weight of the fish and how many are being caught.


Twenty of the 30 flags have been triggered.


The manager of Lake Michigan for the Department of Natural Resources, Jim Dexter, says the lake is not a happy place.


“The lake is very perturbed. It’s certainly not a stable, quality ecosystem. I mean it’s working right now. It’s producing a fishery. People are happy but it’s tenuous.”


There’s not much the state can do to change anything.


If the experience of Lake Huron is any guide, it’s the presence of those little feeder fish, alewives, that is critical.


At the moment, there are believed to be fewer alewives in Lake Michigan than at any time on record.


For the Environment Report, I’m Peter Payette.

Asian Carp Found in Lake Calumet

  • The Bighead Asian Carp found in Lake Calumet. The first physical specimen found beyond the USACOE's electric barrier. (Photo courtesy of the Asian Carp Regional Coordinating Committee)

A Bighead Asian Carp has been found in Lake Calumet in Illinois. This is the first carp to be found beyond the U.S. Army Corps of Engineer’s electric barrier system. Shawn Allee has been covering this story for us and Rebecca Williams caught up with him:

MORE FROM THE ASIAN CARP COORDINATING COMMITTEE

MORE ON THE ASIAN CARP FROM TER

Transcript

The elusive Asian carp, not so elusive now.


This is The Environment Report. I’m Rebecca Williams.


Two species of Asian carp have been moving east, closer and closer to the Great Lakes. There’s a system of electric barriers in a canal near Chicago that are supposed to be the last line of defense. But scientists have wondered whether these carp already swam past that barrier and are breeding in or very close to Lake Michigan. They got that hunch because last year they detected Asian carp DNA in rivers and streams connected to the lake. Now, their fears are confirmed. They found an Asian carp past Chicago’s electric barrier. Shawn Allee reports for us in Chicago and Shawn is here to bring us up to speed.


So where did they find this carp?


Shawn: They found a single 20-pound male Asian carp in Lake Calumet, that’s just west of Lake Michigan.


Why is this location important?


Shawn: Well, I talked to a scientist about that. His name is John Rogner and he’s with the Illinois Department of Natural Resources. He tells me that Lake Calumet is open and it connects to a small river that is also connected to Lake Michigan. And there’s more on this too:


“When you look at Lake Calumet it does appear to us to be ideal habitat. These fish prefer quiet waters in large river systems. You’ll find them in the backwaters and side channels and so Lake Calumet really fits that model to a tee.”


Shawn: But, here’s the thing Rebecca. Commercial fishermen found this Asian carp in Lake Calumet and federal scientists and contractors had already looked there for Asian carp so now they have to go back again.


So why does it matter if the carp is there?


Shawn: Well, these two species of Asian carp are voracious if they’re in the right kind of environment. Basically, they can overtake a food system. They breed so much and they eat so much that there is not enough food for other species of fish to eat. That sort of thing has already happened in the Illinois River system. That’s a river that goes between the Mississippi River in the west all the way to Lake Michigan in the east. And John Rogner tells me that they’re still trying to figure out if this Asian carp is the only one in Lake Calumet or if it’s got a lot of company in there. So they’re going to be using nets and poisons to find that out.


“What we’re trying to determine now is does this fish might represent an individual fish in the lake or might it be part of a larger population and that’s what our intensified sampling over the coming days and maybe even weeks is intended to tell us.”


Shawn: Rogner tells me that they’re going to be testing this particular fish’s DNA down in Springfield, Illinois to see if the fish grew up in the wild or if someone may have moved that fish from somewhere else and maybe just dropped it into Lake Calumet.


Okay, so what are they going to be doing next?


Shawn: They’re going to be going back over places that they have already looked because it’s obvious that they’ve missed at least one fish and they think that maybe they’ve missed some more. The other thing they’re going to be doing is studying whether this kind of carp could breathe in the lake, as Rogner mentioned before. But, one thing they will not be doing is this. They’re not going to be closing the locks that connect Lake Calumet and the rivers in that area to Lake Michigan.


Why not?


Shawn: Well we got one answer from the Army Corps of Engineers. That’s the federal agency that runs the locks. Here’s Mike White:


“At this time we see no reason relative to the threat that’s been identified to take any step for permanent lock closure.”


Shawn: White says the real reason that they’re not really all that worried at this point is that there is just one live fish that they’ve found and it would be expensive to stop barge and boat traffic just for that.


But nobody knows for sure whether there are any Asian carp past the barrier.


Shawn: Not at this point.


Alright, thank you Shawn.


You’re welcome, Rebecca.


That’s The Environment Report. I’m Rebecca Williams.

Lake Huron’s Invasive Species

  • Filmmaker John Schmit says he wanted to make this film to show how even the smallest invader could mess up the delicate balance of life in the lake. (Photo courtesy of the NOAA GLERL)

You might call Lake Huron the forgotten Great Lake. There are no major cities on its shores. It doesn’t get the media attention the other four Great Lakes do. But its problems are just as bad or worse. Rebecca Williams reports a new documentary tells the story of Lake Huron’s struggle with dozens of alien invaders… and the biologists and fishermen who are trying to reclaim their lake:

Transcript

You might call Lake Huron the forgotten Great Lake. There are no major cities on its shores. It doesn’t get the media attention the other four Great Lakes do. But its problems are just as bad or worse. Rebecca Williams reports a new documentary tells the story of Lake Huron’s struggle with dozens of alien invaders… and the biologists and fishermen who are trying to reclaim their lake:

The documentary Lake Invaders is a cautionary tale about opening the door to strangers. It tells how Lake Huron was opened up to alien invasive species. The film paints fish biologists as the heroes rushing in.

“Seems like it always has to wait until it’s at a disaster level before you know, we can start fixing it… we’re constantly putting out these biological fires, running from fire to fire, to try to keep them under control. We have to find another way to approach this.”

More than 180 non-native species have gotten into the Lakes… and some of them have turned everything upside down. Long, slithering, blood-sucking parasites called sea lamprey were the first to get in. They slipped through a canal that connects the Atlantic Ocean and the Great Lakes. Lamprey killed off most of the big predator fish in the Lakes.

Then… came the alewife. Since the lamprey had taken out the top predators… there was nothing to eat the invading alewives. In the film… biologist Jeff Schaeffer explains how the small fish took over the lakes.

“At that time over 90% of the fish biomass of Lake Michigan and Lake Huron was probably dominated by the exotic alewife. One of my colleagues refers to the Great Lakes at that time as alewife soup.”

Suddenly… there was a major stinking mess. Each spring, hundreds of millions of dead alewives washed up on shore and rotted. Not the best thing for tourism.

Filmmaker John Schmit says he was surprised to learn what happened to the lakes next.

“The funny thing about the Great Lakes is there’s Pacific salmon in them.”

Schmit says biologists brought in millions of salmon from the Northwest to control the alewives. The crazy thing is… it worked. In the film we see how a 4 billion dollar sport fishing industry was born. And the native fish of Lake Huron were pretty much forgotten about.

The salmon fishery boomed for decades. Until the alewives crashed in 2003.

Fisher Doug Niergarth says then… the salmon started starving.

“Two years ago we saw some monster salmon heads that were sitting on little dwarfed bodies. And it was the ugliest thing and rather nasty. Just skinny and withered away. It was the nastiest thing you ever done seen.”

The fishing industry started slipping away. Marinas just scraped by. Tackle shops and motels closed. People finally realized there was something wrong with the lakes.

John Schmit says he wanted to make this film to show how even the smallest invader could mess up everything… both the delicate balance of life in the lake and the people who fish it and depend on money from tourism.

“Lake Huron has been the most impacted by the newest invaders. My personal concern, my investment in the Great Lakes and making this documentary is for people to be aware of the kind of damage invasive species can do to these huge lake systems.”

He says his film Lake Invaders is an example of what invasive creatures can do… not just to Lake Huron… but any ecosystem.

For The Environment Report, I’m Rebecca Williams.

Related Links

The End of the Line

  • The documentary, The End Of The Line, takes a look at the status of the world's oceans (Photo courtesy of End Of The Line)

Fish is a big part of our diet. We eat everything from fish sticks and fast food fish sandwiches to sushi and swordfish steaks. But Lester Graham reports a new documentary makes the case we’re overfishing the oceans:

Transcript

Fish is a big part of our diet. We eat everything from fish sticks and fast food fish sandwiches to sushi and swordfish steaks. But Lester Graham reports a new documentary makes the case we’re overfishing the oceans:

This new film is called The End of the Line.

“Everybody recognizes that there’s major problems with the world’s fisheries. And at one level it’s a question of ‘how bad is it?’”

That’s Ray Hilborn of the University of Washington, one of the scientists in the documentary.

The film is a compelling argument that huge fishing trawlers are pushing the fish stocks to the edge.

The first sign of a problem was the cod fishery off the coast of Newfoundland. It collapsed in the 1970s.

But it seemed, despite problems around the world, the total catch around the globe was going up every year. That is, until researchers realized just a few years ago, Communist officials in China were reporting inflated fish numbers to impress their superiors. The world catch was actually getting smaller.

Scientists were stunned, and worried.

“For the first time in human history, the future of the food the world gets from the sea was in doubt.”

“Send a shiver down my spine because that was the one thing a lot of people were holding on to: well, things may be bad, but at least we’re catching lots and we’re catching more every year, so, it can’t be that bad.”

Boris Worm at Dalhousie University is one of the researchers who confirmed the world catch is getting smaller.

He and others have been studying the fact that boats are catching fewer fish, even though the nets are larger and the long lines put out more hooks.

Claire Lewis produced The End of the Line documentary. She admits, this leaves people who see fish as a good source of low-fat protein in a spot.

“It’s very hard. As a parent, you have conflicting evidence. You want to give your children and you want to feed yourself healthy food. You know that’s what fish is. On the other hand, you cannot possible ignore what we’re doing to the oceans, to the ecosystem in the ocean in eating too many fish.”

“Today in every ocean of the world, high-tech industrial vessels are hunting down every known edible species of fish.”

Ray Hilborn: “The basic problem in most fisheries that are in troube is too many boats.”

Charles Clover: “Too much capacity chasing too few fish.”

That last speaker is Charles Clover. The film documentary is based on a book he wrote by the same title. Like the film’s producers, he wants people to be more aware of the plight of the world’s fisheries.

Producer Claire Lewis says there are examples where fishing is being controlled more carefully.

“The most graphic example, I think, in our film, is that fact that in Alaska – which is a very well managed fishery – they take 10% of the stock only. In the North Sea in the E.U., they take 50% of the stock. Now, it seems to me that’s a really, really big difference.”

Lewis says, if left to the big commercial fishing operations, they’ll just keep fishing until fish stocks collapse. And she believes stricter government regulations and better informed consumers are the only things that will stop them.

“I really do believe that it’s the individual consumers who are going to make a difference to this. I think it’s something we can all individually do.”

The film tries to get people to start thinking about what they can do: such as, asking about the fish before you buy it, letting politicians know a sustainable fishery is important, and it encourages people to get involved with groups such as Seafoodwatch.org.

The End of the Line is narrated by actor and environmental activist Ted Danson. It’s appearing in theaters across the nation.

For The Environment Report, I’m Lester Graham.

Related Links

Lamprey Infests Lake Champlain

  • Two sea lampreys attached to a large fish. This predatory parasite is wiping out freshwater salmon and trout in Lake Champlain. (Photo courtesy of U.S. Fish & Wildlife Service)

Government biologists working on Lake
Champlain, between New York and Vermont, say
they’re losing the fight against the sea
lamprey, a parasite that targets freshwater
salmon and trout. The lamprey population has
surged in recent years. Brian Mann reports
scientists say the best solution might be to
turn the fight over to federal biologists
who have had greater success fighting
lamprey on the Great Lakes:

Transcript

Government biologists working on Lake
Champlain, between New York and Vermont, say
they’re losing the fight against the sea
lamprey, a parasite that targets freshwater
salmon and trout. The lamprey population has
surged in recent years. Brian Mann reports
scientists say the best solution might be to
turn the fight over to federal biologists
who have had greater success fighting
lamprey on the Great Lakes:


On a gorgeous April morning, charter boat captain Richard
Greenough went fishing. He didn’t like what he found on his line:


“I went out this morning, I got one fish. Looked like it had been
sitting in front of a machine gun. It was skinny. It looked sick.
And that was a good one, because it’s alive.”


Lake Champlain’s freshwater salmon and trout are being wiped out by a
predator called the sea lamprey. The parasites are awful creatures – long and slimy
with circular suckers used to clamp onto the side of fish.


Back in the early 90s, New York and Vermont partnered with the US Fish
and Wildlife Service on an experimental project to kill lamprey, but
since 1998, the parasites have come roaring back. Speaking at a sea lamprey summit
in Burlington, Vermont, Captain Greenough says his customers regularly catch fish
that are half-eaten and scarred:


“It’s almost an embarrassment right now. Two years ago, I thought it
was bad with a 13-inch lake trout with three lampreys on it. Well, it’s
got so good we got a 12-inch with five on it last year.”


State biologists in Vermont and New York concede that the lamprey
response here simply isn’t working. Doug Stang is chief of fisheries
for New York’s Department of Environmental Conservation:


“You see in our current effort, even though substantial and
significant, just isn’t cutting it. We need to put forth more effort. Or
we need to pick up our toys so to speak and go home.”


Government biologists say abandoning an intensive lamprey program
would mean a complete crash of lake salmon and trout populations.
The fish are in danger of being wiped out by the lamprey. Biologists also say the parasites would likely begin feeding on other
species. One possible solution, Stang says, is turning the lamprey battle over
to the federal government, modeling the effort here after a much larger
lamprey program on the Great Lakes:


“This would provide us with a more centralized approach and this would provide us with a more a coordination for funding
and sea lamprey control efforts.”


The sea lamprey program on the Great Lakes isn’t a complete success.
The program is struggling with proposed funding cuts… and some
critics say the lamprey population in the Great Lakes is still too high.


Despite those concerns, Dale Burkett says the feds are ready to do more on Lake Champlain.
He heads sea lamprey control operations for the Great Lakes Fishery
Commission and works for the US Fish and Wildlife Service:


“The expansion in dollar amount would be somewhere around $310,000 more than is
currently being spent by the collective. I think the Fish and Wildlife
Service has indicated that they are willing, if tasked with that
responsibility, to step up to the plate.”


Federal scientists say that new investment would help to save a $250 million sport fishery.
Even so, the Federal takeover would be controversial. The main weapon
in this fight is a kind of poison called TFM that’s used to kill sea
lamprey larva in rivers.


On the Great Lakes, the use of TFM has a long track record, dating back
to the 1950s, but in New York and Vermont the practice is still
controversial. Joanne Calvi is with a group called the Poultney River
Committee. She says the toxins could affect other native species, including
several varieties of freshwater mussels that are considered endangered or threatened by state biologists:


“I’m opposed to chemical treatment with TFM to control native sea
lamprey in the Poultney River. I feel it should be prohibited.”


A new wrinkle here is the growing scientific consensus that the lamprey are a native species
and might not be invasive at all. Green groups say the parasite’s growing numbers reflect a larger problem with Lake Champlain’s eco-system.


Rose Paul is with the Vermont Chapter of the Nature Conservancy:


“We need to manage the lake’s species and habitats in a more holistic
way, that would help us identify root causes of problems.”


Scientists are experimenting with other methods of controlling lamprey including nest destruction, the release of
sterilized males, and trapping. But in the short term, government resdearchers say lampricide poison is
the only cost-efficient way to prevent the parasite from destroying Lake Champlain’s fishery.


For the Environment Report, I’m Brian Mann in Burlington.

Related Links

Viral Disease Killing Great Lakes Fish

  • Commercial fishers and biologists are concerned about the impact a viral disease will have on the Great Lakes fishery. There have been some large fish kills. Live fish commerce has been restricted to help prevent the spread of the disease.

A disease is spreading, causing large fish kills in the Great Lakes.
Biologists and fishery officials are working to prevent further spread of
the disease, but there’s a conflict between government agencies. Lester
Graham reports there’s also a cost to businesses that deal in live fish:

Transcript

A disease is spreading, causing large fish kills in the Great Lakes. Biologists and
fishery
officials are working to prevent further spread of the disease, but there’s a conflict
between government agencies. Lester Graham reports there’s also a cost to businesses
that deal in live fish:


The disease that’s killing fish is called Viral Hemorrhagic Septicemia — or VHS. Jim
Diana is a fish biologist at the University of Michigan who’s been looking into what
it
does to fish…


“So, it’s a virus that the fish pick up and the virus causes really kind of a
general systemic
deterioration. Most notable, sometimes they’ll develop sores or lesions on the
outside of
the body, but they often will die without really external evidence at all.”


Basically, the fish die from internal bleeding. For several years there have been
die-offs
in the St. Lawrence River, which connects the Great Lakes to the Atlantic Ocean. But
researchers weren’t able to confirm the cause was VHS. Then this past summer in Lake
Saint Clair — the lake near Detroit that lies between Lake Huron and Lake Erie —
Jim
Diana says fish die-offs were confirmed to be caused by VHS.


“And since then, they’ve found it in quite a few other species, something like 20
other
species, so it’s quite widespread.”


It’s not clear how the virus got here. But… it originated in Europe. Researchers
guess
that infected fish hitchhiked in the ballast tanks of a ship… or a live fish shipment
escaped into the St. Lawrence River and it’s spread from there by ship.


Biologists say the spread of VHS is not good. It’s not expected to wipe out fish in
the
Great Lakes. But it is causing some real concern.


“We’re not talking about a couple of fish here, we’re talking about large fish
kills. And
VHS is present in those and implicated in the deaths of those fish.”


Marc Gaden is with the Great Lakes Fishery Commission. Gaden says because stocking
fish is a big industry… there’s a lot of fish shipped between the U.S. and Canada and
between one state and another.


“So, in the Great Lakes basin there is a movement of fish, fish eggs and other fishery
related things like water that’s used in the fish stocking trucks, things like that.
There’s
aquaculture that occurs, fish farms in the Great Lakes basin. The Departments of
Natural Resources harvest fish eggs to use in their stocking programs and the fish
themselves are stocked. So, there’s movement of fish and fish eggs throughout the
Great
Lakes basin just as a normal part of fisheries management and commerce that occurs.”


So the chance that the virus can be spread by all those fish moving around is
significant.
The federal government thought it was such a risk that it banned all fish shipments.
The
states quickly appealed that. They said it was overkill. They persuaded the feds
that they
were doing enough testing that the chances that VHS would be spread were slim.


So, the feds backed off a bit. But restrictions are still causing some problems. For
example… live fish that are not going to be put back into the lakes… live fish that
are
headed for dinner plates at restaurants still have to be tested. And VHS poses no
risk to
human health.


Ted Batterson is the director of the North Central Regional Aquaculture Center at
Michigan State University. He says he knows one fish farmer whose business is
supplying rainbow trout to restaurants.


“Well, now to be able to do that, he has to have the certification that these are
VHS-free.
It takes him currently, with the laboratory he’s been sending these to, up to 90
days to
get the certification that these are disease free. Well, that is not timely because
these
people who want fish at the other end need them in essence like yesterday, not 90 days
down the road.”


Another business hit by the restrictions on moving live fish is the bait industry.
If the
bait industry has to test –for example—one out of every 50 fish… and the test costs
about
50-dollars… no one will be able to afford to sell bait fish.


The states and the feds are still trying to figure out how to prevent the spread of
VHS…
without hurting the businesses that rely on live fish shipments any more than
necessary.
But… some businesses are already feeling the squeeze.


For the Environment Report, this is Lester Graham.

Related Links

Roots of the Great Lakes Fishery

  • Planting fish in the Elk Creek in the late 1800's. Photo courtesy of the State of Michigan Archives.

Head to almost any body of water and chances are you’ll find someone there fishing. We take it for granted that lakes and streams have fish in them. But most waterways can’t produce enough fish to keep up with demand. For more than 100 years states around the nation have been stocking the water with fish. Tamar Charney reports:

Transcript

Head to almost any body of water and chances are you’ll find someone there fishing. We take it for granted that lakes and streams have fish in them. But most waterways can’t produce enough fish to keep up with demand. For over 100 years states around the nation have been stocking the water with fish. Tamar Charney reports:


(Sounds of water in a stream)


When you stand at the side of the Boyne River in northern Michigan, you can smell the balsam fir that line the banks.


“There go a couple of salmon, right at our feet you can see.”


Tim Tebeau is standing under some branches casting his line into the river.


“We’re fishing for steelhead trout today. They are most likely just lying there waiting for something to come their way.”


The lakes and streams in this part of the state have drawn fishermen for years. Tim Tebeau says that includes writer Ernest Hemingway who set many of his short stories in Northern Michigan.


“As a writer I kind of revere Hemingway, and I spend a lot of time fishing the very same streams he did when he was spending his summers here.”


But if it weren’t for human intervention there wouldn’t have been fish for Hemingway, or for Tim Tebeau to fish for. In the mid to late 1800’s people started noticing that pollution, habitat destruction from dams and logging, and over-fishing were killing off almost all the fish in New England, and in the Great Lakes region.


Gary Whelen is the fish production manager for the state of Michigan. He says people began to squeeze out the eggs from fish, hatch them, and put the small fish back into lakes and streams.


“In 1870 many state agencies were looking at building hatchery systems.”


The hatchery systems rebuilt the populations of many native fish, including the brook trout that Hemingway liked to fish for. But they didn’t just breed local fish. For instance they brought in brown trout from Germany in 1883, and Whelan says the steelhead that Tim Tebeau fishes for came from California in 1877.


“Some of us depict that era as the ‘Johnny Fishseed’ period, where we were moving fish all over the continent, and internationally for that matter, bringing fish in that were considered commercially or economically important.”


Now this was long before there were highways, so if you wanted to move stuff long distances you basically had one choice.


(sound of train whistle)


That’s right, trains.


“This is a re-creation of the last of the 3 fish cars that transported fish around the state of Michigan. So this is a re-creation of the Wolverine.”


Maureen Jacobs is with the Michigan Fishery’s Visitors Center. The train car she’s standing in shows people, complete with train sound effects, how the fish were moved in the late 1800s and early 1900s. What you see is that the fish rode in the lap of luxury.


“They had chandeliers on the old fish cars!”


See, the fish cars were Pullman cars, used ones, but they still had all the trappings, including the mahogany bunks that the guys who cared for the fish slept on. Underneath the bunks were row after row of milk cans full of water and tiny little fish.


“Public citizens called ‘applicants’ would apply for permits to meet the train at different depots around the state of Michigan. From there, they would remove the old fish cans and plant the fingerlings in different lakes, rivers, and streams, so the public would basically stock the fish.”


Things are different today. People no longer pick up cans at the train station. Hatcheries are big modern facilities, the fish are moved by truck, and fisheries’ staff take care of releasing them. But they are still needed to make sure there are enough for people to fish for, because over-fishing and environmental damage are problems that haven’t gone away.


(Sounds of birds and water.)


“I’m going to adjust the depth a little bit here, get it closer to the bottom.”


Unfortunately the dark shapes you can just make out swimming around in the Boyne River aren’t biting Tim Tebeau’s line. But he’s says they’re there.


“If it weren’t for stocking programs like the ones we have, we wouldn’t be fishing for anything today; we’d simply be standing here enjoying the river.”


And perhaps tomorrow he’ll catch one, take a good look at it, and release it back to it’s watery world; an experience that will show up in unexpected ways in his writing, the same way fishing these streams inspired Ernest Hemingway many years ago. Good thing there were fish to fish for, huh?


“Whoa, that might have been a fish.”


For the Environment Report I’m Tamar Charney.

Related Links

Invasive Die-Off Stirs Fishery Debate

  • A naturally reproduced wild lake trout fingerling. (Photo courtesy of MI DNR.)

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:

Transcript

The fisheries in the Great Lakes are seeing dramatic changes. In one lake, an invasive species that has become part of the food chain has collapsed. But, some native fish are doing better because of that collapse. Lester Graham reports some fishery managers are debating what to do next:


When we started digging canals, connecting the lakes to the Atlantic Ocean, things changed a lot for the fish in the Great Lakes.


First, the sea lamprey got into the lakes through the Welland canal that bypasses Niagara Falls.


The lamprey is an eel-like parasite that nearly wiped out the big fish in the Great Lakes by attaching to them and sucking the life out of them.

Also slipping through the canals was a smaller fish, the alewife. Since the lamprey wiped out most of the predator fish in the lakes, the alewife population exploded. They out-competed native fish for food. It got so bad, that by the mid 1960s, if you weighed all the fish in Lake Michigan, more than 80% of the weight would have been alewives.


So, once wildlife managers got the sea lamprey under control, they had to figure out what they could do to get alewives under control. The fish biologists decided to introduce new predators, trout and salmon, to prey on the alewives. These fish were not native to the Great Lakes. Expensive nurseries were built by federal and state game agencies to keep supplying new trout and salmon every year to prey on alewives.


Forty years later, in Lake Huron, the alewife population collapsed, and in Lake Michigan alewives are declining rapidly. Mission accomplished, right?


Well, in that 40 years, a whole recreational fishing industry has grown up around fishing for those introduced trout and salmon. Some fishery managers now say we have to find a balance of the right amount of alewives to sustain the introduced trout and salmon fishery. So, recently states have cut their trout and salmon stocking programs to give alewives a chance to recover.


Tom Trudeau [who] operates a fish nursery for the state of Illinois says it would cause trouble to try to take the Great Lakes back to native fish only.


“We do have this industry that we have pressure to keep. You know, you’re putting a lot of people out of business if you get rid of it.”


And Trudeau says because of ecological damage, many of the smaller native fish on which big predators used to feed have been wiped out.


“So, I mean, of the six or seven species in that category, we only have one. And a couple of them are extinct. So, I mean, we could talk about going back to the ideal situation of pure native species, but we’ve disrupted the habitat so much.”


So, the argument goes, the invasive alewives are now needed. But something unexpected happened when the alewives disappeared from Lake Huron. The native fish, walleye, yellow perch, and lake trout started doing better.


Dave Fielder is a fisheries research biologist with the Michigan Department of Natural Resources.


“We’ve long known that adult alewives were a predator and a competitor on newly hatched perch and walleye fry. We just didn’t realize how substantial that effect was until finally the adult alewives were removed from the system and now we’re enjoying some greatly increased reproductive success. Walleye, particularly in Saginaw bay, are at some of the highest levels that we’ve seen in a long time.”


But, after 40 years, people are used to fishing for those introduced trout and salmon. And some fisheries managers are wondering what will happen to all those expensive nurseries that provide their jobs.


What happens to all of those charter boat fishing operations, fishing tourism, if the government were to stop stocking those trout and salmon? Would they switch to fishing for native fish? And, can the native fish even survive in the long-run since so many of the smaller native prey-fish are no longer around?


Dave Fielder says it’s hard to say.


“So, we’re kind of in the middle of a change – it’s really a paradigm shift in many ways – and that’s always scary because nobody really knows how we’re going to end up, but I prefer to be optimistic. I think there are a lot of reasons to be hopeful in regards to the benefits that we’re seeing for our native species.”


But some fisheries managers say the debate of whether to go all native or to try to find the right mix of native and non-native fish is not over. Since invasive species, pollution, and habitat destruction have changed the Great Lakes so much, wildlife managers think they’ll still have to keep stocking one kind of fish or another to keep the recreational fishing industry going. If that’s the case, does it matter whether it’s native fish, or the introduced fish that anglers have grown to like so much?


For the Environment Report, this is Lester Graham.

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Ten Threats: The Beloved Invader

  • Because alewives are the main source of food for some sport fish, some people forget that they're an invasive species. (Photo courtesy of NOAA Fishery Service)

As we look at the “Ten Threats to the Great Lakes,” we’re spending some time examining the effects of the alien invasive species that have changed the Lakes. One of the first invasive species to arrive in the Great Lakes was the alewife; it’s native to the Atlantic Ocean. It has become the most beloved of all the invasives. That’s because it’s food for the most popular sport fish in the Great Lakes. But in the beginning, the sport fish was introduced to get rid of the alewives. Peter Payette reports:

Transcript

Today we’re continuing our series on Ten Threats to the Great Lakes. The Great Lakes Radio Consortium’s Lester Graham is our series guide:


As we look at the “Ten Threats to the Great Lakes,” we’re spending some time examining the effects of the alien invasive species that have changed the Lakes. One of the first invasive species to arrive in the Great Lakes was the alewife; it’s native to the Atlantic Ocean. It has become the most beloved of all the invasives. That’s because it’s food for the most popular sport fish in the Great Lakes. But in the beginning, the sport fish was introduced to get rid of the alewives. Peter Payette reports:


When autumn arrives in Northern Michigan, salmon fishermen line the rivers. The fish, native to the Pacific Ocean, swim upstream to spawn and then die. That’s why Tim Gloshen says they’re not interested in his bait.


“But if you irritate ’em enough and keep putting it in front of them, they’ll snap at it sometimes and you got to be ready when they hit it and set your hook.”


Anglers caught eight million pounds of salmon in Lake Michigan last year. Most of the fish are caught out in the lake.


“I got buddies that are catching couple hundred a year out there. They’re out there twice a week at least, all summer long, you know.”


Tim and his buddies and everyone else who fishes for salmon in the Great Lakes are at the top of the food chain. The money they spend on food, lodging, tackle, and boats figures heavily into decisions about how to manage the Lakes.


But it wasn’t always so.


Pacific salmon were stocked here about forty years ago to control the invading alewives. The native lake trout had just about been wiped out by overfishing and the sea lamprey. With no big predators left, the alewife population exploded.


At one point, it was estimated that for every ten pounds of fish in Lake Michigan, eight were alewives. Occasional die-offs would cause large numbers of alewives to wash up on beaches all over the Great Lakes. Historian Michael Chiarappa says all this was happening as America was feeling the urge to get back in touch with nature.


“And that’s when you get this rise in greater interest in sport fishing, recreational fishing, hunting. Teddy Roosevelt sort of epitomized the spirit of the strenuous life; get back out there and engage nature. It’s good for the soul, it’s good for the body, it’s good for the mind.”


So the salmon was brought in to control the alewife population and transform the Great Lakes into a sport fishing paradise. And it worked. But alewives remained the best food source for the ravenous salmon.


So now a healthy alewife population is seen as a good thing by the states that benefit economically from the recreational fishing. Mark Holey, with the U.S. Fish and Wildlife Service says this has caused people to forget alewives are an invasive species.


“If alewives were knocking on the door today, there may be a much different discussion about it. It may be more like the Asian carp.”


How the alewife would compare to Asian carp is unknown, because the Asian carp has been found in the Mississippi River, but not yet in the Great Lakes. What is known is that when alewives are abundant, native fish don’t do well. For example, Holey says biologists used to think PCBs caused many young lake trout to die. Now they know early mortality is mostly due to thiamin deficiency.
Thiamine is a vitamin lacking in lake trout that eat too many alewives.


“From the studies that we’ve been involved with, anywhere, right now, anywhere between thirty to fifty percent of the females that we take eggs from show some… their eggs show some signs of thiamine deficiency. Which means survival of those eggs are impaired.”


In some cases, none of the eggs will survive. So a worse case estimate would be half of the wild lake trout in the Great Lakes can’t reproduce because of alewives. This is why advocates for native fish species have been happy to see the alewife populations decline in recent years. They almost disappeared from Lake Huron.


Mark Ebener is a fisheries biologist for the Chippewa Ottawa Resource Authority. He says the government agencies that stock salmon and lake trout should stock more than ever to keep pressure on the alewife. Ebener thinks with alewife numbers down, there’s an opportunity to reestablish the native herring as the main prey fish in the Lakes, especially in Lake Huron.


“Saginaw Bay used to have a huge population of lake herring that’s essentially gone. They used to have a tremendous commercial fishery for it, and people used to come from miles around to buy herring there, and everybody in the lower end of the state used to have herring come fall and the springtime when the fishers were fishing, but they’re gone.”


This opportunity to bring herring back might not last much longer. The warm weather this past summer will probably help alewives rebound next year.


For the GLRC, I’m Peter Payette.

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Government Releases Plan for Great Lakes Restoration

  • Congressman Rahm Emanuel speaks at the Great Lakes Regional Collaboration meeting. (Photo courtesy of house.gov)

A coalition led by the federal government is proposing a massive restoration effort for the Great Lakes. Environmental groups say they like most of what’s in the plan, but they’re worried the money to carry it out might not be there. The Great Lakes Radio Consortium’s Michael Leland has more:

Transcript

A coalition led by the federal government is proposing a massive restoration effort for the Great Lakes. Environmental groups say they like most of what’s in the plan, but they’re worried the money to carry it out might not be there. The Great Lake Radio Consortium’s Michael Leland has more.


The draft plan from the government’s task force makes dozens of recommendations. The recommendations include spending billions to modernize municipal sewer systems near the Lakes to cut down on pollution, new federal laws to fight invasive species, and cleaning up some of the Lakes’ most toxic spots.


Andy Buchsbaum is with the National Wildlife Federation’s Great Lakes office. He says a lot’s been done over the last few decades to clean up the Lakes, but there are signs the Lakes are still sick.


“So what you’re seeing is you are seeing real depression of the yellow perch in Lake Michigan, you’re seeing problems with whitefish – they’re sicker and leaner – and you’re seeing some crazy things happen with walleye. Right now there is a good walleye fishery in places, but they were depressed for awhile, and the fluctuations are getting wilder and wilder.”


President George Bush created the Great Lakes Regional Collaboration last year. The task force includes several federal agencies, along with state, local and tribal officials from the region. It also includes representatives from business and conservation groups.


Its members say the group’s draft proposal represents a great opportunity for governments to work together to coordinate the dozens of programs underway throughout the region to restore the Lakes. It can also help bring new money to carrying out those programs. Scott Hassett heads the Wisconsin Department of Natural Resources.


“So if there’s a realistic likelihood of getting the kind of resources and money and brining them to bear, these eight states have to come up with a unified plan, it is a very important point in the process.”


It’s still up in the air how much all this will cost. Environmental groups estimate about twenty billion dollars over the next five years, though the EPA says it’s too soon to put a price tag on the proposal.


Tom Kiernan with the National Parks and Conservation Association. He says the plan is a good one that will make a difference, if Washington and the states commit to paying for it.


“But now we must call the question as to whether federal and state governments will fully fund this plan. If they fully fund the plan, the health of the Lakes and our collective quality of life will improve. If they do not, the Great Lakes as we know them and love them will continue to slowly die.”


The task force will collect public comment on the proposal during the next two months. It also plans to hold five public meetings on the plan throughout the Great Lakes region. The final document’s due out in December.


For the GLRC, I’m Michael Leland.

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