These Prehistoric Fish Are Making a Slow Comeback in the Midwest
Richard Hamilton Smith / Corbis NX / Getty Images
By Susan Cosier
Come February in Wisconsin, almost everything will be covered in ice and snow. In little shanties on frozen Lake Winnebago, a 30-by-13-mile lake in the eastern part of the state, fishers will keep watch over rectangular holes cut into the ice with a chainsaw. When they spot a fin passing below, they'll jab their spears down deep. The lucky ones will earn themselves a lake sturgeon, a species that has prowled the earth's waters for more than 150 million years.
Lake Winnebago is one of only two locations in the world where people can spearfish lake sturgeon. These armored fish, also distinguished by whiskerlike barbels growing from their chins, can live as long as a century, weigh as much as 200 pounds, and grow more than seven feet long. Every year, people gather on the lake for a 16-day fishing event. Just 500 licenses exist, a number that keeps overfishing in check while allowing nearly 1,000 sturgeon to be taken for their caviar (for those lucky enough to catch a female) and meat (delicious when smoked).
The sturgeon spearing event will mark its 80th season this year. And with the fish listed as threatened in 19 of the 20 states where it's found, Wisconsin wildlife officials consider the event one of a number of tactics that help educate people about the fish. (Another is an adoption program allowing members of the public to sponsor and hand-release young fish, reared at a state hatchery, into Lake Michigan and the Milwaukee River, part of the annual SturgeonFest.) Efforts to revive their populations have been somewhat successful, but it's been slow going: Female lake sturgeon don't start reproducing until they're at least 20 years old.
In Wisconsin, you can adopt and release a baby sturgeon or spear a giant one in Lake Winnebago, all part of an effo… https://t.co/fmSmz5PFU2— NRDC 🌎 (@NRDC 🌎)1579874429.0
This biological fact, combined with overfishing, pollution, and habitat degradation, has resulted in their plight today. An estimated 15 million sturgeon used to exist in the Great Lakes, with fishers bringing in upwards of four million pounds per year between 1879 and 1900. The trade took a serious toll on the species. By 1929, commercial sturgeon fishing had closed in Lake Michigan due to too few fish. And by the end of the century, fishers had taken 80 percent of the sturgeon out of Lake Erie. Meanwhile, dams and development ruined habitat and kept the fish from reaching key spawning grounds. In response to the population crash, most states instituted protections and mandated hunting limits in the 1990s and early 2000s.
Today, only 1 percent of the lake sturgeon's population remains. In addition to the states that list them as threatened, the United States Fish and Wildlife Service announced in August that it would study whether to list the fish as federally threatened or endangered.
“The Right Thing for the Great Lakes”
Ryan Koenigs, a fisheries biologist with the Wisconsin Department of Natural Resources (DNR), is among those dedicated to bringing the lake sturgeon back. He's part of a team that keeps track of every individual caught, and he helps run the registration stations where fishers who spear a sturgeon in Lake Winnebago must go before taking their catch home. Koenigs and his colleagues look for a passive integrated transponder (PIT) tag, which offers information about the fish. These tags are implanted in each fish reared or caught and released by the agency. Some individuals caught in the past few years were tagged decades ago. "I'm reaping the benefits right now of what the biologists two generations before me did in the 1970s," Koenigs says.
Restoration efforts also exist in many other states bordering the Great Lakes. In New York, the Department of Environmental Conservation, the U.S. Fish and Wildlife Service, and the Saint Regis Mohawk Tribe harvest sturgeon eggs from the St. Lawrence River and send them to hatcheries in the central part of the state and in Wisconsin. In Michigan, fisheries biologists, researchers, and state agencies successfully protected the sturgeon population in Black Lake and now use the data collected from their efforts to guide their restocking of nearby lakes and streams.
These types of projects replenish waterways with the fish, but the species' recovery has a long way to go. Should conservationists succeed, the fish could end up benefiting the entire ecosystem, notes Ed Baker, a fisheries biologist in Michigan. "If we have a native species fish community that's been degraded, that's a sign that its environment is no longer healthy," he says. "If we can restore lake sturgeon to their prominence, or at least somewhat close to what their prominence was before we started harvesting them, that's a sign that we're doing the right thing for the Great Lakes."
As the lake sturgeon populations rebound, they could help biologists beat back some new threats, too. Notably, they eat invasive zebra and quagga mussels that now blanket the lake beds. They also eat invasive round gobies. All three of these marine species hail from faraway waters and snuck their way in through the ballast water used to balance ships' hulls.
In 1995, Baker was tasked with finishing and implementing Michigan's new sturgeon rehabilitation plan. He observed reach after reach, finding only a few places were the fish still existed. One of those was the Upper Peninsula's Black Lake. Locals still spearfished sturgeon, and the population appeared to be falling. In 2001 Baker and Kim Scribner of Michigan State University set out to study the fish and get a rough population estimate. They concluded that over a 25-year period, sturgeon numbers had declined by more than 60 percent.
The state's Department of Natural Resources decided sturgeon spearfishing could continue, but fishers could harvest no more than five fish a year. Baker and his team stocked the lake, too, and the sturgeon population grew. The limit is now up to 14. Still, the population isn't recovering as quickly as expected.
To figure out why, Baker and Scribner continue their research. They also use the information they collect on basic sturgeon biology, genetics, and behavior to inform conservation efforts in other Michigan water bodies.
One major question they hope to answer concerns the timing of the sturgeon's reproduction. As with steelhead and salmon, it appears that the river where sturgeon spend the first summer of life, between May and October, is imprinted on the fish, and they come back to that place to spawn. Confirming this would help in their stocking efforts—especially in reaches where the fish haven't swum for decades.
In addition to the hatchling adopt-and-release program that takes place in September in Milwaukee, Wisconsonites get another opportunity to help biologists in April, when Koenigs does his stock assessments. On the Wolf River near Lake Winnebago, hundreds of thousands of sturgeon ranging in size from four to seven feet long swim along the waterline. Koenigs and his team stand at the ready with nets to pull the fish out of the water, then weigh, measure, and tag them.
When the team finds fish with those tags implanted during the February spearfishing season, they track the data to get a tagged to non-tagged fish ratio, which is then used to set harvest limits. The data collected at each event helps inform how best to manage the species.
"We're on the right path," says Koenigs, who is now prepping for the spearfishing season that begins on Feb. 8. "The work that's being done through these various efforts seems to be showing some pretty promising signs."
This week marks the official start of fall, but longer nights and colder days can make it harder to spend time outdoors. Luckily, there are several inspiring environmental films that can be streamed at home.
1. Kiss the Ground<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="ccc5f0c92a5603e68aec39e56b0db02a"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/K3-V1j-zMZw?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><strong>Streaming On: Netflix</strong></p><p><strong>Premiere Date: Sept. 22</strong></p><p>Between <a href="https://www.ecowatch.com/wildfires-california-washington-oregon-photos-2647585008.html" target="_self">wildfires devastating the U.S. West Coast</a> and <a href="https://www.ecowatch.com/tropical-storm-beta-landfall-2647760268.html" target="_self">storms battering the Gulf</a>, the impacts of the <a href="https://www.ecowatch.com/climate-change/" target="_self">climate crisis</a> can feel overwhelming right now. <em><a href="https://kissthegroundmovie.com/" rel="noopener noreferrer" target="_blank">Kiss the Ground</a> </em>offers an alternative to all of the bad news by focusing on solutions.</p><p>The film, directed by Josh and Rebecca Tickell and narrated by Woody Harrelson, explains how we can heal the Earth through "regenerative agriculture," farming practices that draw carbon dioxide from the atmosphere and into soil as a way to restore soil health, which in turn boosts ecosystems and food supplies.</p><p>"<em>Kiss the Ground </em>shows how feasible it is to make these changes at a grassroots level immediately and make a truly substantive impact with low cost and easy to implement solutions," Executive Producer RJ Jain said in an email. "This is why I got involved."</p>
2. Public Trust: The Fight for America's Public Lands<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="5338f7a2931e356910026e5fd76fac56"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/jsKMTAaj_wQ?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><strong>Streaming On: YouTube</strong></p><p><strong>Premiere Date: Sept. 25, 2 p.m. EDT </strong></p><p>This <a href="https://www.patagonia.com/films/public-trust/" target="_blank">award-winning documentary</a> tells the stories of Indigenous activists, journalists, whistleblowers and historians working to protect America's <a href="https://www.ecowatch.com/tag/public-lands" target="_self">public lands</a>. The film focuses on three political struggles: the shrinking of <a href="https://www.ecowatch.com/tag/bears-ears" target="_self">Bears Ears</a> National Monument in Utah, the mining of Boundary Waters Wilderness in Minnesota and the opening of the <a href="https://www.ecowatch.com/tag/Arctic-National-Wildlife-Refuge" target="_self">Arctic National Wildlife Refuge</a> to fossil fuel exploration.</p><p><em>Public Trust</em> was directed by David Garrett Byars and produced by Jeremy Rubingh. Patagonia Films, Patagonia founder Yvon Chouinard and actor Robert Redford are executive producers. It will be <a href="https://www.youtube.com/watch?v=OGjnIG7puzY" rel="noopener noreferrer" target="_blank">released</a> on YouTube in time for <a href="https://www.ecowatch.com/national-public-lands-day-2640656776.html" target="_self">National Public Lands Day</a>.</p><p>"Our country is fortunate to have millions of acres of public lands, including National Parks, Monuments, Wildlife Refuges and Wilderness set aside for future generations," Redford said. "Sadly, these lands that belong to you and me are under unprecedented threats from the greed of big corporations, eager to weaken restrictions in the pursuit of profits. Many of our current politicians are also to blame. <em>Public Trust</em> tells the story of citizens who are fighting back. It's a much-needed wake-up call for all of us who want to preserve our unique and wild cultural heritage."</p>
3. David Attenborough: A Life on Our Planet<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="156438a30836a765d7a92982545fc334"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/B_OFZvAd05Y?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><strong>Streaming On: Netflix</strong></p><p><strong>Premiere Date: Oct. 4</strong></p><p>Beloved nature broadcaster <a href="https://www.ecowatch.com/tag/David-Attenborough" target="_self">David Attenborough</a> has spent his career introducing viewers to the wonders of our planet. In recent years, his footage of albatrosses swallowing <a href="https://www.ecowatch.com/tag/plastics" target="_self">plastic</a> in <em>Blue Planet II</em> has been credited with <a href="https://www.ecowatch.com/2018-fighting-plastic-waste-2624606566.html" target="_self">helping to ramp up</a> the global fight against plastic pollution. Now, in this <a href="https://www.wwf.org.uk/" rel="noopener noreferrer" target="_blank">World Wildlife Fund</a> (WWF)-produced <a href="https://www.attenborough.film/" rel="noopener noreferrer" target="_blank">documentary</a>, he reflects on the defining moments of his career and the devastating changes he has witnessed.</p><p><em>David Attenborough: A Life on Our Planet,</em> which was also produced by Silverback Films and directed by Alastair Fothergill, Jonnie Hughes and Keith Scholey, features an intimate conversation between Attenborough and Sir Michael Palin as the broadcaster reflects on his life and a career that took him to every continent on Earth. In addition to streaming on Netflix, the movie will be available in select theaters starting Sept. 28.</p><p>"For decades, David has brought the natural world to the homes of audiences worldwide, but there has never been a more significant moment for him to share his own story and reflections," WWF executive producer Colin Butfield said in a <a href="https://www.wwf.org.uk/updates/david-attenborough-life-our-planet" target="_blank">statement</a>. "This film coincides with a monumental year for environmental action as world leaders make critical decisions on nature and climate. It sends a powerful message from the most inspiring and celebrated naturalist of our time."</p>
- Sir David Attenborough Set to Present BBC Documentary on ... ›
- 7 of the Best New Documentaries About Global Warming - EcoWatch ›
- Movies to Watch This Earth Day: EcoWatch Staff Picks - EcoWatch ›
EcoWatch Daily Newsletter
The world's largest online retailer is making it slightly easier for customer to make eco-conscious choices.
- Employees Are Fighting for Climate Change at Work - EcoWatch ›
- Amazon's Carbon Footprint Rises 15% as Company Invests $2 ... ›
- Jeff Bezos Pledges $10 Billion to Fight the Climate Crisis - EcoWatch ›
- Budweiser Re-Labels As Climate-Friendly Beer - EcoWatch ›
The Trump administration's Environmental Protection Agency (EPA) released a risk assessment for toxic pesticide chlorpyrifos Tuesday that downplayed its effects on children's brains and may be the first indication of how the administration's "secret science" policy could impact public health.
- Democratic Bill Banning Toxic Pesticides Applauded as 'Much ... ›
- Trump EPA Won't Regulate Toxic Drinking Water Chemical That ... ›
- California, Nation's Top User of Chlorpyrifos, Announces Ban on ... ›
- Wheeler's EPA Keeps Brain-Damaging Chlorpyrifos in Food ›
- Entire Pesticide Class Must Be Banned to Save Children's Health ... ›
By Maria Trimarchi and Sarah Gleim
If all the glaciers and ice caps on the planet melted, global sea level would rise by about 230 feet. That amount of water would flood nearly every coastal city around the world [source: U.S. Geological Survey]. Rising temperatures, melting arctic ice, drought, desertification and other catastrophic effects of climate change are not examples of future troubles — they are reality today. Climate change isn't just about the environment; its effects touch every part of our lives, from the stability of our governments and economies to our health and where we live.
<p>Why environmental refugees flee their homes is a complicated mixture of environmental degradation and desperate socioeconomic conditions. People leave their homes when their livelihoods and safety are jeopardized. What effects of climate change put them in jeopardy? Climate change triggers, among other problems, desertification and drought, <a href="https://science.howstuffworks.com/environmental/green-science/deforestation.htm" target="_blank">deforestation</a>, land degradation, rising sea levels, <a href="https://science.howstuffworks.com/nature/natural-disasters/flood.htm" target="_blank">floods</a>, more frequent and more extreme storms, <a href="https://science.howstuffworks.com/nature/natural-disasters/earthquake.htm" target="_blank">earthquakes</a>, <a href="https://science.howstuffworks.com/nature/natural-disasters/volcano.htm" target="_blank">volcanoes</a>, food insecurity and famine.</p><p>The September <a href="http://visionofhumanity.org/app/uploads/2020/09/ETR_2020_web-1.pdf" target="_blank">2020 Ecological Threat Register Report</a>, by the Institute for Economics & Peace, predicts the hardest hit populations will be:</p><ul><li>Sub-Saharan Africa, South Asia, the Middle East and North Africa</li><li>Afghanistan, Syria, Iraq, Chad, India and Pakistan (which are among the world's least peaceful countries)</li><li>Pakistan, Ethiopia and Iran are most at risk for mass displacements</li><li>Haiti faces the highest risk of all countries in Central America and the Caribbean</li><li>India and China will be among countries experiencing high or extreme water stress</li></ul>
- Think Today's Refugee Crisis is Bad? Climate Change Will Make it a ... ›
- Climate Change Forces 20 Million People to Flee Each Year, Oxfam ... ›
- Meet the World's First Climate Refugees - EcoWatch ›
In his latest documentary, My Octopus Teacher, free diver and filmmaker Craig Foster tells a unique story about his friendship and bond with an octopus in a kelp forest in Cape Town, South Africa. It's been labeled "the love story that we need right now" by The Cut.
- You're Not So Different From an Octopus: Rethinking Our ... ›
- 'Eating Animals' Drives Home Where Our Food Really Comes From ... ›