Cormorant-Killing Policy Ruffles Feathers

  • Cormorant populations have risen exponentially from their previously dismal numbers. (Photo courtesy of the NOAA)

Across the Great Lakes region, the recovery of the cormorant
is booming. But some anglers and resort owners think the cormorants are eating too many of the fish that people like to eat. In some areas, wildlife managers have resorted to killing cormorants on popular fishing lakes. In one case, critics say there’s not enough evidence to justify the killing. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Across the Great Lakes region the recovery of the cormorant is booming. But some anglers and resort owners think the cormorants are eating too many of the fish that people like to eat. In some areas, wildlife managers have resorted to killing cormorants on popular fishing lakes. In one case, critics say there’s not enough evidence to justify the killing. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:


Larry Jacobson is the third generation in his family to run the Hiawatha Beach Resort on Leech Lake, about two hundred miles north of Minneapolis. Three years ago, on fishing opener weekend, all of his twenty-one cabins were full. This year, he had no guests. Jacobson says the word has spread that fishing is down on Leech Lake. He blames the cormorants. The birds nest on a small island in the south end of the lake. Eight years ago, there were fifty nests; last year, there were two thousand five hundred.


“The cormorants eat about a pound fish a day. The way the population was just exploding out there, you could see writing was on the wall, that this was really going to make dramatic impact.”


Jacobson says his guests are still catching big walleye, but the smaller, pan-sized walleye are getting hard to find.


There are several reasons why the walleye population might be down, but Jacobson and other business owners blame it on the cormorants, and they’ve asked the Department of Natural Resources to do something about the birds.


“Leech needs to be maintained as high quality fishery. There’s such an economic impact to the area from walleyes, that if you don’t maintain it that way, everyone’s going to be suffering.”


(Sound of boat motor)


Resource officials are responding to the resort owners’ concerns. The Leech Lake Band of Ojibwe owns the island. John Ringle is wildlife manager for the tribe.


“Okay we’re headed right at Little Pelican Island right now.”


Little Pelican Island is about three acres of sand and scruffy shrubs. Hundreds of cormorants cover the shore. Ringle says they fish out here in the open waters of Leech Lake.


“They’re omnivorous so they’re eating all sorts of different varieties of fish. Right now they’re probably eating large numbers of perch.”


Ringle is working with state and federal agencies to reduce the number of cormorants nesting here, eating fish, and crowding out other birds, such as the endangered common tern.


Normally, cormorants are a federally protected bird, just like eagles. That’s because they were almost wiped out by the insecticide DDT before it was banned in 1973. But a new rule allows resource officials to harass and even kill cormorants where they’re damaging other wildlife.


This summer, workers are sitting in hunting blinds on Little Pelican Island, shooting cormorants. They use air rifles to make as little noise as possible, so the other cormorants aren’t spooked away.


So far, they’ve killed more than two thousand birds. They plan to leave about five hundred nesting pairs alive. Ringle says nobody’s happy about shooting cormorants, but he says he thinks it’s necessary.


RINGLE: “My philosophy is that as mankind utilizes the resource, we have to manage them, we’re not in finite supply.”


HEMPHILL: “Do you think we know enough to manage them?”


RINGLE: “Not really. I think the public is demanding action prior to any conclusive study being conducted.”


And that’s a big problem for Francie Cuthbert. She’s a professor and cormorant researcher at the University of Minnesota. Cuthbert says the agencies that want to cut down the cormorant population skipped an important part of the management process: finding out what’s actually happening on Leech Lake.


“They’re really being driven by complaints from citizens and resort owners who are concerned about local economics, and who just don’t like the birds; they’re afraid of the numbers. If we responded to all natural resources conflicts this way, we’d be in a state of chaos.”


Cuthbert says even with the cormorants’ dramatic comeback since the days of DDT, there still aren’t as many as there were a hundred years ago. She says rather than kill cormorants, wildlife officials should try to boost the number of fish.


The state of Minnesota is working on that. It’s stocking Leech Lake with walleye for the first time this year. Conservation officials are studying some of the birds they killed to find out what they’re eating. And the state is also limiting what size of walleye anglers can catch so the fish can recover.


That makes resort owners like Larry Jacobson nervous, because he says a lot of anglers don’t like the limits. But at least he’s glad someone’s doing something.


“The fishery is a business, there’s no question about that. If you want to sustain our economy in this area, you’ve got to manage the lake.”


Workers will continue shooting cormorants occasionally through the summer. And the control effort could continue. Experts say it’ll take several years for the fish to recover enough to draw anglers back to the lake.


For the GLRC, I’m Stephanie Hemphill.

Related Links

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

Comments Sought on Navigation Study

The U.S. Army Corps of Engineers and the Canadian Department of Transportation are studying the navigational system in the Great Lakes and along the Saint Lawrence River. As the Great Lakes Radio Consortium’s Celeste Headlee reports, the groups are holding public hearings on the issue this summer:

Transcript

The U.S. Army Corps of Engineers and the Canadian Department of
Transportation are studying the navigational system in the Great Lakes and along the
Saint Lawrence River. As the Great Lakes Radio Consortium’s Celeste Headlee reports,
the groups are holding public hearings on the issue this summer:


The study will evaluate current conditions in the Great Lakes and determine what is
required to maintain the navigational routes at the existing size and capacity.


Tim Eder is the director of Water Resources for National Wildlife
Federation. He says any plans for Great Lakes navigation must address current problems
of invasive species and habitat destruction, not make them worse. Eder says only a
handful of ships come in from foreign ports on a daily basis…


“But each ship brings with it the risk of another invasive species and right now, our
fishery in the Great Lakes region is teetering on the brink of collapse because of zebra
mussels, because of sea lampreys, because of Asian carp that are knocking on the door
trying to get into the Great Lakes… most of which, not all, but most of which come in the
ballast tanks of ships from foreign ports.”


The public hearings are being held at various locations through July 14th.


For the Great Lakes Radio Consortium, I’m Celeste Headlee.

Related Links

States to Have More Control Over Goose Populations?

The U.S. Fish and Wildlife Service plans to give the states more power in reducing the resident Canada geese population. The Great Lakes Radio Consortium’s Karen Kelly has more:

Transcript

The U.S. Fish and Wildlife Service plans to give the states more power in reducing the resident
Canada geese population. The Great Lakes Radio Consortium’s Karen Kelly has more:


An estimated 3.2 million Canada geese have made permanent homes on lawns, farms, and airport
runways across the U.S.


Officials say the birds collide with aircraft, damage crops and pollute water supplies.


States traditionally needed a permit to get rid of geese.


But Ron Kokel, a biologist with U.S. Fish and Wildlife, says the new proposal would allow
communities to have more say in how the bird population is managed.


“It puts the decision on exactly what management technique the state or local authorities want to
use; it puts that decision more on the local level.”


The public has until October 20th to comment to the U.S. Fish and Wildlife Service on the
proposal.


For the Great Lakes Radio Consortium, I’m Karen Kelly.

Related Links

Asian Food Stores Adding to Carp Problem?

  • An Illinois Natural History Survey intern shows off her catch (a bighead carp). Officials are concerned that human behavior may help the invasive fish get around the barrier on the Chicago River. (Photo by Mark Pegg, INHS)

Over time, invasive species have upset the natural balance of the Great Lakes. Now, officials are working frantically to stop a new threat, the Asian carp. The carp lives in tributaries connected to the Great Lakes. But there may be another route into the water system – through Asian food stores. As the Great Lakes Radio Consortium’s Karen Kelly reports, live carp can be purchased in many cities throughout the region:

Transcript

Over time, invasive species have upset the natural balance of the Great Lakes. Now, officials are
working frantically to stop a new threat, the Asian carp. The carp lives in tributaries connected to
the Great Lakes. But there may be another route into the water system – through Asian food
stores. As the Great Lakes Radio Consortium’s Karen Kelly reports, live carp can be purchased
in many cities throughout the region:


“This one in Chinese, layoo. This one in Chinese…”


York Alooah stands in front of a crowded fish tank at the 168 Market in Ottawa, Canada’s capital.
He points to the fat, foot and a half-long bighead carp swimming behind the glass.


The fish are brought to his store by truck from Toronto. They originate at farms in the southern
U.S.


Speaking through an interpreter, Alooah says it’s unlikely that a carp could escape during
delivery.


“They use a big truck and have the fish tank inside.”


Alooah says the fish can’t jump out because the tanks are covered. Still, the live sale of these fish
has many people worried. That’s why states like Indiana, Michigan, Minnesota and Ohio have
banned the possession of live Asian carp.


Several states are also asking the federal government to add these carp to a list of invasive species
considered harmful. That listing would make it illegal to possess them alive.


In Canada, there aren’t laws like that on the looks. But officials say they’re considering action.


Nick Mandrack is a research scientist with the Canadian Department of Fisheries and Oceans. He
says Canadian researchers are keeping an eye on an Asian carp population that’s moving north up
the Mississippi River. They worry that the fish will migrate through a manmade canal into the
Great Lakes.


“If they were to become established, either through dispersal up from the Mississippi or
unauthorized release as a result of the live food trade, they could have enormous impacts on the
Great Lakes ecosystem, which would likely result in a dramatic decline in the biomass of game
fishes.”


That’s because two species of Asian carp eat the same food as small forage fishes. And those
forage fishes are what the larger gamefish rely on. The Asian carp are too big for the gamefish to
eat.


Researchers are also worried about two other species. The black carp could wipe out endangered
mussels that live in the lakes. And the grass carp destroys aquatic plants where native fishes live.


Mandrack has seen both the bighead and the grass carp sold live in Asian food stores. He and
others say that poses one of the greatest threats to the Great Lakes fish population.


(sound of fish scaling)


Back at the 168 market in Ottawa, York Alooah uses a long knife to butcher and scale a fish he’s
pulled out of a tank. He laughs when an interpreter asks if people ever leave his store with live
carp.


“When people buy, it’s not alive. He clean and kill and clean everything.” Is it never alive?”
“Never.”


In fact, the city of Chicago is hoping to guarantee that doesn’t happen. Officials want stores that
sell live carp to operate under permits. And the fish would have to be killed before it left the
store.


But not all fish is bought for consumption. There’s also concern about a Buddhist practice in
which captive animals are released into the wild.


Tookdun Chudrin is a nun with the MidAmerica Buddhist Association. She says the carp sold in
food stores are not likely candidates for release.


“I think that people would not buy such a large fish for liberation because they tend to get very
small animals and very often will put them in a pond at a temple.


And Chudrin says, Buddhists would want to know if the religious practice was harming other
animals.


“I think definitely if there were a sign saying that said putting these fish in the lakes could be
detrimental to other species, I think people for sure would heed that if this was going to endanger
others and the people knew it, I don’t think they’d do that.”


So far, only two Asian carp have been found – in the Canadian waters of the Great Lakes.
Another was released in a fountain in Toronto, just a few blocks from Lake Ontario.


Whether from pranks, or acts of kindness, some fear it’s only a matter of time before more carp
get into the water. They say the Great Lakes could become a giant carp pond, and many of the
species we’ve come to know would disappear.


For the Great Lakes Radio Consortium, I’m Karen Kelly.

Ice Delays Opening of Seaway

Despite warmer weather, the St. Lawrence Seaway will open six days late because there’s too much ice on the St. Lawrence River. Icebreakers will begin work clearing a shipping channel this week. The Great Lakes Radio Consortium’s David Sommerstein reports:

Transcript

Despite warmer weather, the St. Lawrence Seaway will open 6 days late because there’s too much
ice on the St. Lawrence River. Icebreakers will begin work clearing a shipping channel this week.
The Great Lakes Radio Consortium’s David Sommerstein reports:


Ice fishermen on the St. Lawrence are drilling through more than three feet of ice in some places.


[drilling sound]


It’s the thickest ice buildup they’ve seen in decades. It’s causing the St. Lawrence Seaway to
postpone its opening from March 25th to March 31st this year. It’s the first time that’s happened in
the waterway’s 44 year history.


Seaway Administrator Albert Jacquez says the decision was made after consulting weather experts
and officials in Canada.


“If we can’t ensure to the best of our ability that a ship can get through without damage to either
our facilities or the ship itself and ultimately to the environment around us, we shouldn’t be
opening and so that’s what is the determination.”


When there’s too much ice on the river, a freighter’s wake can damage
vegetation, cause shoreline erosion, and disturb fisheries. Shippers say an
idle freighter can cost them 100,000 dollars a day.


For the Great Lakes Radio Consortium, I’m David Sommerstein.

Tracking Long-Term Zebra Mussel Changes

Zebra mussels have been colonizing North American lakes and rivers since 1991. Scientists have looked at many of the ways mussels affect those ecosystems. But a new study underway shows how those effects are moving up the food web…and are having two very different results. The Great Lakes Radio Consortium’s Mark Brodie reports:

Transcript

Zebra mussels have been colonizing North American lakes and rivers since 1991. Scientists have looked at many of the ways mussels affect those ecosystems. But a new study underway shows how those effects are moving up the food web…and are having two very different results. The Great Lakes Radio Consortium’s Mark Brodie reports:


Between 50 and 5-hundred billion zebra mussels now live in New York’s Hudson River. That’s a lot of hungry mouths to feed on the river’s zooplankton and phytoplankton. The problem is the mussels are not the only ones that like to dine on the microscopic plants and animals. A new report suggests the mussels are stealing food from some of the river’s fish.


That’s forcing those fish to look elsewhere for their meals. Sandra Nierzwicki-Bauer is the director of the Darrin Freshwater Institute, and a biology professor at Rensselaer Polytechnic Institute in Troy, New York. She says the zebra mussels can dramatically alter an ecosystem.


“They’re very rapid filter feeders, and as such, they’re able to remove tremendous amounts of phytoplankton, algae, bacteria in the water column. As such, the phytoplankton serves as food sources for other organisms so you really are impacting the entire food web.”


Nierzwicki-Bauer says those impacts go all the way up to fish. David Strayer is a freshwater ecologist at the Institute of Ecosystem Studies, and a lead author of the report on the Hudson River. He says his team studied fish populations in the Hudson both before and since zebra mussels colonized there.


“In open water fish species, we saw a decline in abundance, we saw declines in growth rates, and we saw that the populations of those fish tended to shift downriver compared to the period before the zebra mussel invasion.”


That means some of the most common and popular fish in the Hudson are no longer where they used to be…among them American shad, herring, and white perch. That’s because the zebra mussels are eating those fish’s food…forcing the fish to go elsewhere.


But Strayer says while some fish have had to move away from the mussels…some species have welcomed their new neighbors.


“In the same period of time, we saw populations of fish that live in the weed beds…we saw those populations increase, we saw growth rates of those fish increase, and we saw the populations of those weed bed fish shift upriver into the area where the zebra mussels lived.”


These forage fish have more to eat because the plants at the river’s bottom are growing more. That’s because the zebra mussels clear up the water, which allows more sunlight to reach the plants. Strayer says the zebra mussels have changed almost everything about the Hudson’s ecology.


But he says some of those changes have been difficult to predict, and the changes may not apply to all bodies of water where the mussels have colonized. This is one of the first studies using long term data that looks at the zebra mussels’ affect on fish populations…but there is some evidence that other bodies of water are dealing with similar situations. There have been reports that zebra mussels may be affecting smelt and chub in Lake Michigan…these smaller fish are food for larger species, such as trout and salmon. But while the results are comparable, David Strayer says the changes in the Hudson River are more pronounced than changes elsewhere.


“This isn’t because we have more zebra mussels in the Hudson than in the other places, but it’s because there are differences in the structure of the ecosystem between the Hudson River and the Great Lakes and other places that have been invaded. So, you have to be a little cautious extrapolating from one body of water to the next.”


That sentiment is shared by Andy Kahnly. He’s a fishery scientist with the Hudson River fishery unit of the New York State Department of Environmental Conservation. He also worked on the new study. Kahnly warns for now, the results only apply to young fish…and not adults. That’s because fish can live up to 30 years, and the data don’t go that far back.


“Quite often, changes in early lifestages will take some time to translate into changes in fish populations and then to changes in fish communities. So it takes a lot of data, a lot of years of data to see a change.”


Kahnly says that means anglers in the Hudson might begin to notice some changes over the next few years… and he says the study did find a dramatic decrease in many of the species that people catch.


“If these changes in production of young persist into the future, then definitely there will be a decrease in the abundance of the adults which people are fishing for.”


But that depends on what you’re fishing for. The Institute of Ecosystem Studies’ David Strayer says your perspective might change depending on that you’re trying to catch.


“If you’re concerned about shad populations, if you’re a shad fisherman, then you might be concerned with the zebra mussel invasion and think it’s a bad thing. If you like the weed beds, if you’re a duck hunter or a large mouth bass fisherman this might be regarded as a positive thing.”


Strayer says the study shows zebra mussels are capable of having a tremendous impact on an ecosystem. He says it also shows the importance of being careful to prevent the introduction of invasive species…like zebra mussels…into an ecosystem.


For the Great Lakes Radio Consortium, I’m Mark Brodie.

The End of Fishtown?

Jim Carlson’s family has been fishing the waters of Lake Michigan for more than a century. While there used to be thousands of fishing operations like Carlson’s in the Great Lakes, that number has dwindled over the years. It’s estimated there may be only a few hundred left. Carlson says he could soon join that trend, if a year-old fishing treaty between the State of Michigan and five Native American tribes brings his family business to ruin. And that has his neighbors worried, too. That’s because on Michigan’s Leelanau Peninsula, fishing and tourism rely on each other for survival. And the demise of Carlson’s business could have a profound impact on the local economy. The Great Lakes Radio Consortium’s Rick Pluta has the story:

Artificial Reefs: A Help or a Hindrance?

Artificial reefs are being built in the Great Lakes to attract fish.
Sport fishing groups like them because the reefs make it easier to catch
fish. However…the Great Lakes Radio Consortium’s Lester Graham reports
some conservationists are concerned the artificial reefs could destroy
natural habitat:

Fish Release Scaled Back

There’s a shortage of fish food in the Great Lakes, so Wisconsin and
three other states have agreed to reduce the number of Chinook salmon
released into Lake Michigan in the spring. The action comes because a
limited food supply in the lake could threaten other fish populations.
The Great Lakes Radio Consortium’s Patty Murray reports: