We here at the blog are currently working on getting lots of end-of-year stuff done (i.e. planning the annual CFL Holiday Party!) and, well, good blog posts take time. And, also, it’s COLD!
Baby, it’s cold outside. Seriously. A frozen Hasler Lab awaits its limnologists.
Lucky for us (and you), despite these poor excuses, there have been some cool limnological links on the web lately. So, while we work on our next post, enjoy these dispatches from other awesome sources of information!
Rotenone on Store Shelves, Despite Fears of Parkinson’s Risk
Anyone in our line of work knows that Rotenone is a powerful piscicide (fish poison). It’s often resource manager’s last line of defense against invasive species and, basically, it kills anything with gills, letting degraded bodies of water “start” over through stocking of natives. But, a Scientific American blog post from a prominent toxicologist found that the dangerous chemical can be found on shelves as a variety of products for home and garden. Continue reading
Solomon David holds a lake whitefish taken from the … River during a winter migration run. (Photo courtesy of Solomon David).
Last week, an excellent article in the Milwaukee Journal Sentinel covered some great news – lake whitefish are migrating inland to spawn and, in many cases, fish were running up into tributaries where they hadn’t been seen for 100 years.
One of the scientists featured in that article is Solomon David, a post doctoral researcher working jointly with Chicago’s Shedd Aquarium and the Center for Limnology’s Pete McIntyre on Great Lakes migratory fish. We asked Solomon a few questions about the migration and what the expanding ranges mean about the state of Wisconsin rivers.
Most people think of fish migrations as springtime phenomena – why winter? Is there an ecological advantage to end-of-year migrations?
Solomon David (SD): Many people think of spring migrations for fish like Northern pike and suckers, which are other focal migratory groups in our research in the McIntyre Lab. But Chinook salmon spawn in the fall, and lake whitefish spawn a bit later in the fall and early winter. There are advantages to spawning when it’s cold… Continue reading
Some Center for Limnology grad students recently returned from Georgia’s Sapelo Island. It’s part of the UW-Madison class, “Zoology 750: Problems in Oceanography.” All students have to create individual experiments for the trip. But only one required “The Crusher”
CFL grad student, Alex Latzka, also shot some video of Samantha Oliver’s experiment and turned it into in-your-face footage of crushing in slow-motion. Enjoy!
With apologies to the Syfy network and its outstanding ability to combine species into preposterous science fiction specials, we’re showcasing these videos our post doc, Solomon David, recently took with colleagues from the Shedd Aquarium in Chicago. It’s an embarrassment of fishy riches for the Thanksgiving holiday.
Lurking in the waters of a Chicago harbor, Solomon plunked a GoPro camera into the water and caught a cornucopia of silver-sided gizzard shad schooling along the shoreline.
That video caught the eye of the Chicago Sun Times. Equally cool is the video below of a male bullhead guarding a dark vortex of his progeny in this “[cat]fish-nado” below. Both videos show that there’s a lot going on under the surface of Chicago’s waterways. We won’t get too alarmed until someone puts a “carp-nado” on YouTube!
Folks over at the Wisconsin Department of Natural Resources have an excellent blog called “Live from the Lakes” featuring a series called “Lake of the Month” and, this month, that lake will be no stranger to anyone who follows our work. Sparkling Lake, up in Vilas County, received a nice write-up, featuring research spearheaded by the North Temperate Lakes Long-Term Ecological Research project, which is managed here at the Center for Limnology. LTER scientists have battled the invasive rusty crayfish in Sparkling Lake and, as the WDNR blog shows, have managed to gain the upper hand. Keep reading for the first part of the story… Continue reading
As you may have heard, this is the week we here in America reserve for stuffing our faces with no shame whatsoever as we give thanks to some hardy souls that braved harsh winters before central heating and gore-tex was even a thing.
Carl Bachtel prepares his world (well Cleveland) famous “perch roll up” recipe. Courtesy: WKYC
In the spirit of this glorious holiday, we’re asking you to share some of your favorite limnological recipes – anything from walleye to wild rice to crayfish. If it lives in an inland water, it’s fair game.
Our entry comes courtesy of Carl “Big Daddy” Bachtel. In addition to being a multimedia and TV journalist at WKYC in Cleveland, Ohio, Carl is a Bass Pro Shops “Pro,” giving fishing seminars at area stores and he’s the guy behind WKYC’s series “Outdoors with Big Daddy.” Continue reading
The Wisconsin Department of Natural Resources and The Nature Conservancy are currently undertaking a very hands-on project for invasive species control. The program also points to a question resource managers are currently asking – when it comes to Eurasian water milfoil, is the current chemical cure worse than the disease?
A mat of Eurasian water milfoil. Photo: Gretchen Hansen
CFL grad student and WDNR scientist, Ali Mikulyuk, is part of a team exploring that issue. We’ll be examining it in depth soon on this blog. Until then, enjoy this excellent post from The Nature Conservancy’s “Cool Green Science” blog:
Scuba Divers Provide Non-Chemical Weed Control on Wisconsin Lake
By Matt Miller, senior science writer
When invasive Eurasian watermilfoil comes to a lake, conventional wisdom says you can kiss wildlife habitat and clean water goodbye.
Conservationists often must resort to using chemicals to control the aquatic weed. But those chemicals can imperil the very wildlife that weed control is supposed to protect.
At Lulu Lake in southcentral Wisconsin, though, scientists may have found the Eurasian watermilfoil’s worst enemies: scuba divers and snorkelers.
Hand picking by underwater crews, followed by restoration, may offer one of the most effective ways of controlling this aquatic nuisance. And it’s so simple, cost effective and non-toxic that lakeside home owners and other citizen groups can undertake weed removal projects.
Read the full article here…
Just thought we’d share this excellent little animation explaining what an otolith is and what one can tell fisheries researchers. Credit goes to the folks at “From Reefs to Rivers,” Florida’s Fisheries blog for this little tidbit of science communication.
We here at the CFL use otoliths for lots of research, especially on freshwater fish migrations.
by Luke Winslow
Two weeks ago Saturday: I wake up at home, make some coffee and read The Economist. It is fall now and the temperature is cooler and pleasant. I have accepted that the trip to Antarctica probably won’t happen as a result of the government shutdown. I’m mentally preparing for a slightly less chilly task – removing the Lake Mendota buoy for the fall.
Last Saturday: I wake up. I’m at the bottom of a four foot deep hole in the snow. I have large scrapes and bruises up and down my side. My left arm is sore and doesn’t have full range of motion. There is a Nalgene filled with my own urine sitting next to me. My back aches. I take a picture.
Whoa. It’s been a wild couple of weeks.
CFL grad student LUke Winslow comes to after a fall in Antarctica. Photo: Luke Winslow
If this were a movie from the 90′s, there would be a fade-out here. Because this is an email, I will just hit enter a few times to indicate a transition to the backstory. Continue reading
Readers of this blog may already be aware that Pete McIntyre and a handful of his staff and students are undertaking a big research project in Tanzania. Now a new interactive website is in the works that will let folks at home follow along as the team plies the waters of Africa’s gigantic Lake Tanganyika.
The following promo for the site was just released. Stay tuned for updates!
Into the Rift – Promo from HabitatSeven on Vimeo.
Thanks to the folks at HabitatSeven for the great film work!