Looking to The Skies to Save U.S. Fish

CFL post doc, Brenda Pracheil, shows off one of the fish that prompted her study in Fisheries magazine – Credit:Dan Kolterman, Florida Fish & Wildlife COnservation Commission

A University of Wisconsin-Madison researcher says states should be looking to the skies in order to save fish.

Brenda Pracheil, a postdoctoral fellow at the UW-Madison Center for Limnology, thinks it’s time for fish to garner the same protection afforded migratory birds. Migratory birds are protected by the federal Migratory Bird Treaty Act of 1918, and state collaboration and federal oversight span borders and encompass large conservation efforts in migratory flyways, especially for waterfowl.

But many freshwater fish migrate, too, says Pracheil. In fact, she notes, some work their way through thousands of miles of water and cross half a dozen state lines in the process. And that’s why, she argues, fish need “swimways.”

Read more here

CFL in Africa – Not Your “Typical” Day at the Lake

“Team” McIntyre gets ready for another summer of fieldwork on Lake Tanganyika.

In the summer of 2012, a team of researchers from the University of Wisconsin-Madison’s Center for Limnology and Wright State University in Ohio, will call the shores of Africa’s Lake Tanganyika home.

The oldest and deepest of the African rift lakes, Tanganyika is a natural wonder under severe threat. What’s more, it’s near-shore ecosystem contains a paradoxical combination of scarce nutrients but globally-high primary productivity, animal biomass and a diversity of grazing fish and invertebrates. What supports such a thriving ecosystem when there’s little nutrient input to the lake? Our sleuths have set out to Tanzania to find out.

Understanding how “Lake T” works is imperative in order to protect its remarkable biodiversity ( there are more than 700 endemic animal species) and the essential services (fisheries, clean water, transportation) it provides to the citizens of the four countries lining its shores.

Our own Ellen Hamann, lab manager for Professor Pete McIntyre, is currently with Pete and the rest of the crew in Africa. She recently recapped a day in the field…

There is no typical day in the field, I guess…but what we do on any given day depends on a few things:

1.       Which project goal we’re trying to accomplish
2.       If our gear is cooperating
3.       If the weather is cooperating
4.       If our guts are cooperating
So here it is…one random field day during the Mahale excursion:
Monday, 2 July 2012
7:30am – Wake up. Head to breakfast and see what Hassan has cooked up.

Team McIntyre heads out into Lake Tanganyika for a day of snail collecting, fish id’ing and sonde deployment.

8:30am – Start packing up the gear we’ll need for the day (snail quadrats, fish quadrats, plum lines, whirl pacs, dive tanks, BCD’s, regs, snorkel stuff, wetsuits-that-reek-of-urine, our lunch!) into the smallest space possible and walk it down to the water.

8:45am – Head down the beach to boat storage with Pete. Watch in horror as Dakota (one of our trusty park staff) mouth-siphons fuel from the 200L barrel into our 25L tank. Mix in the 2-stroke oil and haul it and our motor down to the Zodiac. Pump up the keel of the Zodiac again because it’s always flat (must find mysterious small leak…). Guts feel…off. Take 2 Pepto and pack 2 more into dry bag – Just In Case. – Continue Reading at the Lake Tanganyika Ecosystem Project blog

Tracking Northern Pike in Green Bay

CFL grad student, Dan Oele, is trying to see if pike return to their “birthplace” to spawn or if any ol’ tributary will do. Thanks to funding from the Great Lakes Restoration Initiative, Oele is out in Green Bay working on an answer. Watch (or read) below:

GREEN BAY — It’s the second day of April and Dan Oele is cruising the tributaries of Green Bay on the hunt for northern pike. Continue reading

Smallmouth Bass: One Hazard of Fieldwork in Wisconsin Lakes

Center for Limnology grad student, Gretchen Hansen, took this video from a past summer’s field season up in Vilas County. While we’ll honor the tradition of fishermen not sharing their favorite spots, it’s safe to say smallmouth bass are doing quite well in this particular lake.  Watch as one bass gets aggressive while Gretchen tries to collect rusty crayfish for her research. She says opportunistic bass would often grab her “samples” before she got a handle on them. Not this time, though!