Anglers Competing With Cormorants

  • The cormorant population is booming in the region, and some anglers say they're competing too hard with the birds for fish. (Photo courtesy of Steve Mortensen, Leech Lake Band of Ojibwe)

Anglers around the Great Lakes are eager for a summer of fishing. Everyone wants to catch the big one. But they’re getting some competition. It comes in the form of the double-crested cormorant. The big black birds with long necks are fish eaters. Cormorants were nearly wiped out by the now-banned pesticide, DDT, in the 1970’s. But now cormorants are back in big numbers. Some anglers feel there are too many cormorants now. And they say the birds are eating too many fish. The Great Lakes Radio Consortium’s Stephanie Hemphill reports on one experimental effort to control cormorants:

Transcript

Anglers around the Great Lakes are eager for a summer of fishing. Everyone wants to
catch the big one, but they’re getting some competition. It comes in the form of the
double-crested cormorant. The big black birds with long necks are fish eaters.
Cormorants were nearly wiped out by the now-banned pesticide, DDT, in the 1970’s. But
now cormorants are back in big numbers. Some anglers feel there are too many
cormorants now, and they say the birds are eating too many fish. The Great Lakes Radio
Consortium’s Stephanie Hemphill reports on one experimental effort to control
cormorants:


(sound of waves)


Robin Whaley often fishes here on Knife River. It’s the biggest spawning ground for
rainbow trout on the north shore of Lake Superior. But today she’s watching the
cormorants on Knife Island, a quarter-mile offshore.


The cormorant population is booming. About a hundred cormorants lived on the island
last year.


“I guess they’re just coming up into this area in the last few years and becoming a
problem, for degrading habitat and for eating little fish.”


Cormorants are native to this area, but they haven’t been around much in the last few
decades, because of poisoning from the pesticide DDT.


The Minnesota Department of Natural Resources stocks rainbow trout here. This year
they put 40,000 young fish into the river. Anglers like Robin Whaley hope the little fish
will grow big enough for them to catch someday.


The little fish face a lot of predators and hazards and the cormorants are one more threat.
Some people would like to reduce that threat. It’s illegal to kill cormorants. They’re
protected by law because they’re a migratory bird.


But a new federal rule says if they’re threatening a resource, people can fight back in a
different way.


Bill Paul runs the Agriculture Department’s Wildlife Services Program in Minnesota. He
sent workers onto Knife Island to try to keep the cormorants from nesting. Their methods
are experimental – but they’re pretty basic.


“We put up some flapping tarps in wind, a couple of yellow raincoat scarecrows, we also
put up ten flashing highway barricade lights, we also have a light siren device out there
that goes during the night.”


The workers also used special firecrackers shot by guns at passing birds to scare them
away.


They did this for two weeks during the cormorants’ nesting season. Bill Paul says even
with all that noise and commotion it wasn’t easy to scare them away.


“They seem to be fairly smart birds and real persistent at coming back to Knife Island.
So we’re uncertain yet whether our activities are actually going to keep them off there
long-term.”


As part of their study, researchers had permission to kill 25 cormorants to find out what
they’d been eating. They wanted to see how much of a threat the birds were to game fish
like the rainbow trout.


They found fish in the cormorants’ stomachs all right. But not the kind most people like
to catch and eat.


Don Schreiner supervises the Lake Superior fishery for the Minnesota DNR. He says
he’d need more than just a few samples to really know what the birds are eating.


“My guess is that cormorants are opportunists and if there’s a small silver fish out there
and he’s just hanging out and the cormorant has that available to eat, he’ll eat it. The
question becomes, is this a significant part of the population that they’re consuming, or
isn’t it?”


Despite the concerns of some anglers, researchers have been studying cormorants for
years, and so far they haven’t been able to prove the birds are harming wild fish
populations.


John Pastor is an ecologist at the University of Minnesota Duluth. He says the study at
Knife River won’t prove anything useful either.


He says it ignores the bigger picture. Pastor says you can’t just look at one predator and
come to any firm conclusions. There could be lots of reasons why there aren’t many
steelhead, or rainbow trout.


“Changes in land use. All the adult steelhead out there eating the young of the year
steelhead. Maybe it’s some pollutant in the lake. You never know. But it’s easy to fix on
the predator as the problem, because people see a cormorant dive down and come up with
a fish, and they say to themselves, I could have caught that fish.”


Pastor says even if the cormorants are eating lots of young rainbow trout, it doesn’t
necessarily mean the birds are hurting the overall trout population.


And even for an angler like Robin Whaley, the concern about the trout is mixed with a
feeling of respect for the cormorant.


“I admire the bird very much, but human beings, we’re in the business of controlling
habitats and populations, and this is just another case of that.”


For many anglers, the ultimate question in this competition between predators is simple.
It’s about who gets the trout – cormorants or humans.


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

Related Links

Jet Ski Debate Heats Up

Personal watercraft, also known by their trade name “jet skis,” are the hottest sellers among watercraft in the Great Lakes region. They’re causing some heated debate as well. They’ve been banned in many National Parks, and some Great Lakes states are also regulating their use. Last summer, New York passed a law allowing towns to make their own rules for jet skis. Some have already banned them on local lakes. The Great Lakes Radio Consortium’s David Sommerstein reports on the controversy jet skis are provoking:

Transcript

Personal watercraft, also known by their trade name “jet-skis”, are the hottest sellers among watercraft in the Great Lakes region. They’re causing some heated debate as well. They’ve been banned in many National Parks, and some Great Lakes states are also regulating their use. Last summer New York passed a law allowing towns to make their own rules for jet-skis. Some have already banned them on local lakes.


The Great Lakes Radio Consortium’s David Sommerstein reports on the controversy jet skis are provoking.


When Jay Schecter relaxes in the quiet of his home on Hannawa Pond in northern New York, there’s one sound he can’t stand.


(Sound of jet ski starting up and driving away)


It’s a personal watercraft, or Jet Ski. It’s easy to get Schecter to talk about last summer when young kids driving jet-skis nearly drove him crazy.


“…y’know, weaving in and out of traffic and wake jumping. The awful noise, going uuuuuuuuuuuuu for literally hours on end.”


(Sound of buzzing Jet Ski)


Jet-skis are different from other motorized boats, not just because they sound different. They ride high on the water’s surface and can easily make sharp turns. So they can come closer to shores and docks at higher speeds than traditional motorboats can.


Schecter heard about the new “home rule” law in New York that allows towns to make their own jet-ski rules. At the same time, he started to hear from his neighbors.


“I started to hear complaints about jet-skis from recreational boaters, big time water-skiers, older gentlemen who’d been on the pond for many years.”


So Schecter spearheaded a campaign over the winter to get the machines banned from the water. The town Board compromised with what amounted to a jet-ski curfew from 6 in the evening to 9 in the morning. The proposal sparked a controversy on the pond that’s divided neighbors into pro- and anti-jet ski camps.


(Sound of motor boat approaching dock; then sound of guys under track)


Just down the shoreline from Jay Schecter’s place, a few motorboats idle up to Alex Vangelo’s dock. Alex and his friends like to get together on hot days like these – maybe get in a little water-skiing after work. None of them own jet skis, but they don’t want any new rules, either. Alex says most jet skiers on this pond are responsible users.


“They’ve got three or four jet skis and they get home from work and they like to get on it and ride up and down the river a couple times. Well, God bless ’em, I say”


Alex’s friend Mark Luthauser loves to cruise around in his motorboat and says his neighbors should have the right to enjoy their jet skis.


“I’d be happier without jet skis on here, but it’s just not fair for me to support something just because I personally don’t like it.”


New York’s “home rule” law is the first of its kind in the country. Other Great Lakes states have a range of Jet Ski laws on the books. But most of them don’t restrict where and when they can be used – they just regulate unsafe and risky operation.


Some people say the problems with jet skis go well beyond noise, safety, and personal freedoms. The two-stroke engines in jet skis are heavy polluters, dumping up to a third of their fuel into the air and water. The most often cited statistic says that one day of Jet Ski play emits as much pollution as a new car driven 100,000 miles. Shawn Smith of Blue Water Network, a national environmental group, says jet skis endanger fish and birds, too.


“The way they’re designed, they don’t have propellers; they’re powered by a jet pump. That allows them to get into waterways where traditional boats cannot. Often these waterways are very shallow and represent some of the most sensitive habitat for wildlife – breeding grounds, nesting areas, that type of thing.”


Groups like Blue Water Network are pushing for more states to consider “home rule” laws like New York’s.


But Industry representatives say advances in technology will soon silence the complaints against the watercraft. Monita Fontaine directs the Personal Watercraft Industry Association. She says new personal watercrafts are already 75% cleaner and 70% quieter than the older models.


“People will have to look at what it is they don’t like about personal watercraft because it certainly will not be the fact that there are any environmental impacts. And people will have to see if, in fact, it’s simple prejudice.”


(Sound up)


Back on Hannawa Pond, John Ohmohundro, another jet-ski opponent, says the jet ski controversy is similar to other “man and machine” vs. “nature and neighbor” conflicts, from snowmobiles to boom boxes to ATVs.


“Where does your right to play any way you want to interfere with my right for peace and quiet, clean air, clean water, safety…I’m interested in that issue.”


(Sound of jet ski)


So are many other people. Across the region this summer, residents will be crowding public meetings to consider their own Jet Ski restrictions.


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

Quieting Those Annoying Jet-Skis

Manufacturers of personal watercraft are making efforts to cut down on
complaints this summer. Plans include better training for people who
buy the waterbikes and cutting down on noise. The Great Lakes Radio
Consortium’s Mike Simonson has more:

Noise Pollution Dampens the Sounds of Nature

A man who listens to the sounds of nature for a living…says we’re
missing a lot. He thinks because of noise pollution and because we’re
disconnected from wildlife…people often go through life without hearing
much of the rest of the living world. The Great Lakes Radio
Consortium’s Lester Graham reports: