Fish Stocking Taxing

  • As fewer Brown Trout from a state stocking program survive in the waters of Thunder Bay in Lake Huron, the fish takes on the allure of a trophy fish, especially since those that do survive can grow very large. Last year, a 28 pound Brown Trout won the tournament. It may be the biggest Brown ever to be caught in the state of Michigan. (Photo by Linda Stephan)

Most cities have their symbols. Imagine San Francisco without
the Golden Gate, New York without the Statue of Liberty, or
Miami without dolphins. Linda Stephan has the story of a
community that has linked itself with a fish that is not native to
its waters. And stocking that fish is costing taxpayers a lot:

Transcript

Most cities have their symbols. Imagine San Francisco without
the Golden Gate, New York without the Statue of Liberty, or
Miami without dolphins. Linda Stephan has the story of a
community that has linked itself with a fish that is not native to
its waters. And stocking that fish is costing taxpayers a lot:


The brown trout arrived in Lake Huron’s Thunder Bay by a
fluke. Back in the 1970s, about a thousand fish – surplus stocks
from inland waters – were simply tossed out into the bay by
biologists, as if the bay were a trash bin.


No one expected them to survive. They thought they’d just be
food for other fish. But the brown trout did survive. They
quickly grew large and feisty. The state started to stock these
waters with young brown trout every year because anglers
liked catching them.


In fact, it was so popular, they named a fishing tournament after
it: the brown trout Festival in Alpena, Michigan. This year, a
crowd of hundreds gathered, despite periodic rain showers, as
festival o-“FISH”-als weighed in a day’s catch… lake trout, walleye:


(Sound of announcer at tournament)


You don’t need a brown trout to win at the brown trout
Festival. And it’s a good thing because these days, most boats
don’t catch even one. That’s because things have changed.


The ecosystems of Lake Huron and the other Great Lakes are
changing rapidly, as foreign invasive species, such as the zebra and
quagga mussels, steal away food at the bottom of the lake’s
food web.


Plus, a migratory bird that’s been showing up in this bay in huge
numbers, cormorants, have been eating the small browns
stocked by state fish nurseries before the fish ever make it into
open waters.


For the past decade, the Brown hasn’t survived all that well in
Lake Huron. So today biologists estimate that, taking into
account all those fish that don’t survive, every time an angler
catches a big Brownie, it now costs taxpayers close to
three hundred dollars.


In other words, each brown trout caught represents about
three hundred dollars spent by the state stocking program.
Even though the brown trout is not native, people here say the
fish belongs in these waters.


Hobbyist Dick Cadarette at the brown trout Festival says the Brown has a special allure for
the angler:


“Well, because they’re the best eating and they’re the hardest to
catch. That’s why we call it the brown trout because anybody
can catch a steelhead – I mean a lake trout – but they can’t
everybody catch a Brown.”


As the large fish becomes more and more elusive, it takes on
the allure of a trophy fish.


Fisheries Biologist Dave Fielder says because of the cost – for
years now – the state has had good reason to quit stocking these
waters with brown trout, but they still haven’t. No one’s
willing to see the namesake of the brown trout Festival
disappear:


“What’s always amazed me is how the natural resources in
Michigan, including the fisheries that we enjoy in the Great
Lakes, is really a part of that local heritage and quality of
life for these local communities and becomes an important part of the local existance and indentity it’s important that we
as scientists don’t lose sight of that.”


But some say the fact that the local community has gotten used
to seeing the brown trout does not mean it belongs in the lake.
Mark Ebener is a Fisheries Biologist for the Chippewa-Ottawa
Resource Authority. It regulates fishing for five Native
American tribes:


“You tell a lie long enough and sooner or later people
believe it and accept it as the truth. You know it’s not that
brown trout belong here. brown trout were introduced
and they continue to be defined as an introduced species
into North America.”


Ebener says since the brown trout does no harm to native fish,
such as the lake trout, his organization doesn’t oppose the
stocking program. But he also says at the current cost, the
brown trout is a clear waste of taxpayer money.


Back in Alpena, Biologist Dave Fielder agrees the state can’t
keep stocking the lake with browns if so few continue to
survive. But, an angler himself, he looks with envy on a
mounted brown that took last year’s top prize in the tournament,
an unbelievable 28.2 pounds:


“Can you imagine landin’ that fish? That must have been
somethin’. Anybody’s who’s caught fish can look at that and imagine the battle they must’ve went through and the excitement they must’ve felt. And those are real feelings and that’s not to be
trivialized.”


That’s evidence to Fielder, and others who fish these waters,
that at least some brown trout have what it takes to complete
for food in the changing ecosystems of Lake Huron.


For the Environment Report, I’m Linda Stephan.

Related Links

Salmon Stocking Cuts to Hurt Native Fish?

Several state agencies in the region will
reduce the amount of salmon stocked in Lakes Huron and Michigan next year. The change is designed to help the alewife population recover. Alewives are the salmon’s main food source, but as the Great Lakes Radio Consortium’s Peter Payette reports, some biologists think helping the alewife will hurt native fish:

Transcript

Several state agencies in the region (IL, IN, MI, WI) will reduce the amount
of salmon stocked in Lakes Huron and Michigan next year. The change is
designed to help the alewife population recover. Alewives are the salmon’s
main food source, but as the Great Lakes Radio Consortium’s Peter Payette
reports some biologists think helping the alewife will hurt native fish:


The total number of salmon stocked in the two lakes will be cut by more than
a third next year. The state agencies that manage the stocking programs say
there was widespread support for the decisions, but one dissenting voice was
the Chippewa Ottawa Resource Authority, or CORA.


CORA supports recovery of native fish species like the Lake trout. Mark
Ebener is a fishery Biologist with CORA. He says you can’t protect
alewives and expect lake trout to do well.


“So you have to commit to one or the other. Instead of what the states are
going to do, and what Michigan is going to do, it’s going to protect alewife
by reducing stocking so they can have healthier salmon, but at the same time
it’s going to say, ‘Well tribes we still want you to support Lake trout
rehabilitation and we still support it and think it’s still feasible.'”


Female lake trout that have a diet heavy in alewives can develop a nutrient
deficiency. It causes most of their young to die soon after birth.


For the GLRC, I’m Peter Payette.

Related Links

Ten Threats: Luring the Lamprey

  • The sea lamprey, up close. (Photo courtesy of USFWS)

One of the Ten Threats to the Great Lakes is the decline of many of the native species. The lake trout has been in trouble from over-fishing and because of an invasive species called, the sea lamprey. Conservation agents use a pesticide to keep the lamprey down, but it’s expensive, and sometimes it kills other fish. Now, researchers have discovered a lamprey pheromone that could help the fight against the sea lamprey. Stephanie Hemphill has that story:

Transcript

In our next report in the series Ten Threats to the Great Lakes we hear about how a native
fish has been hurt by an invasive species that swam into the lakes through a canal. Lester
Graham is our guide through the series.


One of the Ten Threats to the Great Lakes is the decline of many of the native species.
The lake trout has been in trouble from over-fishing and because of an invasive species
called, the sea lamprey. Ever since it invaded the Great Lakes, scientists have been trying
to keep the invasive sea lamprey under control.


Conservation agents use a pesticide to keep the lamprey numbers down, but it’s expensive,
and sometimes it kills other fish. Now, researchers have discovered a lamprey
pheromone. They think the chemical attractant could be a big help in their fight against
one of the most destructive invasive species in the Great Lakes. Stephanie Hemphill
has that story:


The sea lamprey came into the Great Lakes through canals more than a hundred years
ago. The slimy parasites attach themselves to big fish and feed on them until they die.
Each lamprey can kill 40 pounds of fish in its lifetime.


Between sea lampreys and over-fishing, the big native fish, the Lake Trout, was wiped out
in the lower Great Lakes. Only a few survived in small pockets in Lake Huron. Lake
Superior is the only place Lake Trout survive in healthy numbers.


There’s an aggressive 15-million dollar a year program to keep sea lamprey numbers
down. Part of the effort is using a chemical called TFM that kills the lamprey.
Wildlife managers spread the lampricide in streams in the spring. It kills some of the
young lamprey as they swim down into the lake.


University of Minnesota biologist Peter Sorensen says he and other scientists noticed that
TFM kills not just the juveniles, but the larvae that live in the streambed too. They also
realized, after a stream is treated, very few adult lamprey come back to the stream to
spawn, or lay new eggs.


“And this led to an observation decades ago, which was key, that adult lamprey must be
selective in how they pick streams. They only pick a few, and if you remove the larvae
they don’t seem to go in there.”


Scientists suspected the larvae might play a role in the spawning migration of adults.
That might mean the larvae are putting out a pheromone that tells the adults it’s a good
place to spawn. Just one larva attracts a lot of adult lamprey, indicating the pheromone
is very potent.


It was up to Jared Fine to determine what the chemical is. Fine is a PhD student working
with Peter Sorensen. For two years he sifted through the water in tanks holding lamprey
larvae.


“Separating the different chemical compounds, testing them biologically, seeing which
ones have activity, coming back to the active ones, further separating them, and just
repeating this until you get down to the one or two or three compounds that have the
activity.”


Fine narrowed it down to three compounds. He purified them and gave them to a colleague in the chemistry department, Thomas Hoye. Hoye created a synthetic version of the most potent pheromone. He says it should be possible to produce it on a large scale, and that means it could be used to treat the
Great Lakes. The question is, how much would he need?


“You know, would it be a tank car load, would it be a football field, would it be a dump
truck? It’s none of those. Would it be a barrel? No. Is it a bucket-full? No. In
fact it’s only about 500 grams, that’s just one pound, would treat all that water for a
month.”


And that’s all it would take, because the lamprey only spawn for a month, but the
treatment would have to happen once a year. Peter Sorensen says when lamprey
approach a stream to spawn, their clock is ticking. They have a powerful urge to lay
eggs, and once they’ve done that, they die.


“They are driven animals. Frankly they’re kind of on autopilot and pheromones are
what’s driving that autopilot to a very large extent, and now that we’ve got it, I think we
can really powerfully use that to our advantage.”


Sorensen says fisheries managers could use the pheromone to attract more lampreys to
streams outfitted with traps.


“You know the key here is the fact that this pheromone is natural, safe, and should be
very inexpensive to add.”


Fisheries managers hope the pheromone will help reduce the cost of controlling the
lamprey and add a new weapon to their arsenal.


The news on lamprey couldn’t have come at a better time for wildlife managers
around Lake Superior. After years of relatively constant numbers, the lamprey
population jumped dramatically this year. Scientists say lamprey may be finding new
spawning grounds in the mouths of streams, where lampricide is less effective. They’re
hoping they can use the pheromone to draw the lamprey to traps further upstream.


For the GLRC, I’m Stephanie Hemphill.

Related Links

Ten Threats: The Earliest Invader

  • A bridge for a river... this portion of the Erie Canal crossed the Genesee River via an aqueduct in Rochester, NY. This photo was taken around 1914. (From the collection of the Rochester Public Library Local History Division)

The Ten Threats to the Great Lakes” is looking first at alien invasive species. There are more than 160 non-native species in the Great Lakes basin. If they do environmental or economic harm, they’re called invasive species. There are estimates that invasive species cost the region billions of dollars a year. Different species got here different ways. David Sommerstein tells us how some of the region’s earliest invaders got into the Lakes:

Transcript

We’re bringing you an extensive series on Ten Threats to the Great Lakes. The Great Lakes Radio Consortium’s Lester Graham is guiding us through the reports:


“The Ten Threats to the Great Lakes” is looking first at alien invasive species. There are more than 160 non-native species in the Great Lakes basin. If they do environmental or economic harm, they’re called invasive species. There are estimates that invasive species cost the region billions of dollars a year. Different species got here different ways. David Sommerstein tells us how some of the region’s earliest invaders got into the Lakes:


If the history of invasive species were a movie, it would open like this:


(Sound of banjo)


It’s 1825. Politicians have just ridden the first ship across the newly dug Erie Canal from Buffalo to New York.


(Sound of “The Erie Canal”)


“I’ve got an old mule, and her name is Sal. Fifteen miles on the Erie Canal…”


Chuck O’Neill is an invasive species expert with New York Sea Grant.


“At the canal’s formal opening, Governor DeWitt Clinton dumped a cask of Lake Erie water; he dumped that water into New York Harbor.”


Meanwhile, in Buffalo, a cask of Hudson River water was triumphantly poured into Lake Erie.


“In a movie, that would be the flashback with the impending doom-type music in the background.”


(Sound of ominous music)


It was an engineering and economic milestone, but a danger lurked. For the first time since glaciers carved the landscape twelve thousand years ago, water from the Hudson and water from the Great Lakes mixed.


(Sound of “Dragnet” theme)


Enter the villain: the sea lamprey. It’s a slimy, snake-like parasite in the Atlantic Ocean. It sucks the blood of host fish.


Within a decade after the Erie Canal and its network of feeders opened, the sea lamprey uses the waterways to swim into Lake Ontario. By the 1920’s and 30’s, it squirms into the upper Lakes, bypassing Niagara Falls through the Welland Canal.


What happens next is among the most notorious examples of damage done by an invasive species in the Great Lakes. By the 1950’s, the sea lamprey devastates Lake trout populations in Lake Superior. Mark Gaden is with the Great Lakes Fishery Commission.


“They changed a way of life in the Great Lakes basin, the lampreys. They preyed directly on fish, they drove commercial fisheries out of business, the communities in the areas that were built around the fisheries were impacted severely.”


The sea lamprey wasn’t the only invader that used the canals. Canal barges carried stowaway plants and animals in their hulls and ballast. In the mid-1800’s, the European faucet snail clogged water intakes across the region. The European pea clam, purple loosestrife, marsh foxtail, flowering rush – all used the canal system to enter the Great Lakes.


Chuck O’Neill says the spread of invasive species also tells the tale of human transportation.


“If you look at a map, you can pretty much say there was some kind of a right-of-way – railroad, canal, stageline – that was in those areas just by the vegetation patterns.”


Almost one hundred invasive species came to the Great Lakes this way before 1960. O’Neill says every new arrival had a cascading effect.


“Each time you add in to an ecosystem another organism that can out-compete the native organisms that evolved there, you’re gradually making that ecosystem more and more artificial, less and less stable, much more likely to be invaded by the next invader that comes along.”


(Sound of “Dragnet” theme)


The next one in the Great Lakes just might be the Asian Carp. It’s swimming up the Illinois River, headed toward Lake Michigan. Cameron Davis directs the Alliance for the Great Lakes.


“If this thing gets in, it can cause catastrophic damage to the Great Lakes, ‘cause it eats thirty, forty percent of its body weight in plankton every day, and plankton are the base of the food chain in the Great Lakes.”


The U.S. Army Corps of Engineers has installed an electric barrier in the Chicago Sanitary and Ship Canal that might stop the carp. But as long as the canals around the region remain open for shipping and recreation, it’s likely more invaders may hitch a ride or simply swim into the Great Lakes.


For the GLRC, I’m David Sommerstein.

Related Links

‘Non-Stick’ Chemical Discovered in Great Lakes

New research shows that chemicals used to repel food, stains, and water are sticking just about everywhere else in the environment. They were recently found in the Great Lakes. But as the Great Lakes Radio Consortium’s Sarah Hulett reports, their discovery was not a surprise:

Transcript

New research shows that chemicals used to repel food, stains, and water are
sticking just about everywhere else in the environment. They were recently found
in the Great Lakes. But as the Great Lakes Radio Consortium’s Sarah Hulett
reports, their discovery was not a surprise:


The chemicals are called perfluoronated compounds. They’re used in products
like Teflon, Scotchgard, and Gore-Tex. They’ve been detected in animals from
Arctic polar bears to seals and birds in the Baltic.


Matt Simcik is a researcher at the University of Minnesota. His studies turned up
the chemicals in lake trout from all five Great Lakes. Simcik says a likely source
for the contaminants is wastewater treatment plants.


“Because these chemicals are used in everyday use – textiles and carpets and
things. And when you wash your clothes, or wash your carpet, that water gets
into the waste system, and eventually ends up in the lake.”


The effects of the chemicals on humans is the subject of intense debate – but at
high exposures they’ve been linked to problems including birth defects and
cancer .


One of the two known chemicals has been phased out of use. Federal regulators
are looking at the other to determine whether it should be restricted as well.


For the Great Lakes Radio Consortium, I’m Sarah Hulett.

Commercial Fishers Angling for Trout Fishing Rights

  • Steve Dahl is one of about 25 commercial fishers on the North Shore of Lake Superior. Dahl makes a modest living selling herring, but he'd like to be able to fish for lake trout too. When he's fishing for herring, Dahl pulls his gill net up and passes it across his boat, plucking herring from the mesh. (Photo by Stephanie Hemphill)

Some fish populations in the Great Lakes have recovered dramatically from the devastating pollution of the last century. But the very health of the fishery presents a new set of challenges for people. Who gets to catch the fish? Most states favor sport anglers, but some commercial fishing operations are asking for a bigger share. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Some fish populations in the Great Lakes have recovered dramatically from the
devastating pollution of the last century. But the very health of the fishery presents a
new set of challenges for people. Who gets to catch the fish? Most states favor sport
anglers, but some commercial fishing operations are asking for a bigger share. The Great
Lakes Radio Consortium’s Stephanie Hemphill reports:


(sound: engine zooms, slows)


Steve Dahl guides his aluminum boat to his gill net, anchored below the waves of Lake
Superior. He fishes out of Knife River, a small town just up the shore from Duluth
Minnesota. A few feet at a time, the net offers up its catch – slender silver herring
caught by the gills.


“The mesh actually has a little bit of flex to it. That’s why I can squeeze them out. One
that’s too big or fat, you have to back it out, so you don’t harm the flesh.”


The openings in the net are just right to catch herring. Too small for lake trout. Dahl
isn’t allowed to catch lake trout anyway. He says they mostly just bounce off the net.


When the net is empty, about 40 herring – each of them about a pound – are lying in a tub
at the bottom of the boat.


Dahl is working hard for these fish. It’s pretty cold, and the wind is gusting.


(ambient sound)


Dahl says sometimes the current is so strong, he can’t pull the net up out of the water.
Sometimes there are no fish in the net. In the
summer, they move around and they’re hard to find. And of course, he can’t fish when
the lake is frozen.


But he loves this life.


“I get to be outside all the time, my own boss. It’s great fun.”


Steve Dahl sells his catch to the restaurants and fish houses that dot the North Shore of
Lake Superior. He makes his living this way. He says he doesn’t make a lot of money,
but it’s a good life.


Dahl says the money would be better if he were allowed to fish for lake trout. He figures
he’d be able to make several thousand dollars more a year if he could catch even just a
few hundred lake trout.


“That’s all we’re asking for is to be able to supply the local restaurants through the peak
tourist season.”


Lake trout were almost wiped out by over-fishing and by the parasitic sea lamprey in the
1960’s and 70’s. The lamprey are under control now, and decades of stocking lake trout
have brought the population back up. People who fish for sport have been catching more
and more lake trout. Last year, they caught about 15,000 of the fish on the Minnesota
side of Lake Superior. But so far the state of Minnesota won’t allow commercial fishers
to go after them. Neither will Michigan, although Wisconsin and Ontario do.


Don Schreiner manages the Lake Superior fishery for Minnesota. He says restoring the
lake trout population is taking a long time. That’s why they don’t want to open it up to
commercial fishing just yet.


“Right now we’re pretty cautious, we’ve just started kinda pulling back on stocking and it
seems a little premature to start thinking about opening the door for commercial
fisheries.”


Next year, Minnesota plans to create a new ten-year plan for the fish in its Lake Superior
waters. Don Schreiner says during the planning process, everyone will be able to have
their say. But sport anglers far outnumber the two dozen or so commercial fishermen on
the North Shore. So they’ll need to find allies in their claim on the lake trout.


Paul Bergman is likely to speak up in favor of commercial fishing for lake trout. He
owns the Vanilla Bean Bakery & Café in Two Harbors, Minnesota. He buys herring from
Steve Dahl. He says half his customers order fish, and they love it when it’s locally
caught.


“People really do come up here for the native fish on the North Shore, so we’re getting so
many more repeat customers now from the cities. More and more are asking for the fish.”


Bergman puts a sign in the window when he has fresh herring, and he says it pulls people
in. He’d like to be able to do the same with lake trout.


For the Great Lakes Radio Consortium, I’m Stephanie Hemphill.

Related Links

Success in Controlling the Lamprey

  • Sea lampreys feed on a lake trout. The invasive species damages the Great Lakes fishery. (photo courtesy Great Lakes Fishery Commission)

A new effort to eradicate the sea lamprey is attacking one major
trouble spot. The Great Lakes Radio Consortium’s Lester Graham
reports… the parasite is being trapped and poisoned:

Related Links

The Business of Fish Management

  • Similar scenes can be found up and down the eastern shore of Lake Michigan.

Now that summer’s officially here, beaches around the region are packed with
tourists and locals. But this year many beaches have been plagued with
unwanted visitors: tens of thousands of dead fish in the water and on the
sand. It’s a revolting sight-and smell – but in fact, the fish play an
important role in the lakes…and present an ongoing management challenge to
biologists. The Great Lakes Radio Consortium’s Wendy Nelson explains: