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Coulee Region Trout Unlimited
Serving the Wisconsin counties of:
La Crosse, Crawford, Juneau, Monroe, Richland, and Vernon
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Fish Science in the Heart of the Driftless Region
This is from an article I wrote for the Winter 2024/25 issue of WisTrout, enhanced here with additional photos and links.

Jason G. Freund
5 days ago5 min read
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Fisheries Management Topics: Intro to Population Dynamics
This is a post written by Jason Freund, originally for The Scientific Fly Angler blog, which we are publishing on the Coulee Region Trout Unlimited website . Populations are incredibly complex as they are always changing - hence why we talk about population dynamics. The factors responsible for those changes are a mix of unpredictable (weather, floods, fish kills, etc.) and somewhat predictable (interactions among individuals - competition, predation, etc.). However, there ar

Jason G. Freund
May 115 min read
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Exploring Wisconsin's Driftless Area: A Fly Angler's Guide
The Driftless Area covers about 24,000 square miles (over 15 million acres) and goes by a host of names - the Coulee Region, bluff lands or bluff country, the Paleozoic plateau, or a host of other names. The Driftless Area occurs because Lake Superior's depth along with the highlands between the Driftless Area and Lake Superior helped divert glaciers around this area. Although often treated as a rather homogeneous area, it is much more diverse than we often recognize.

Jason G. Freund
Apr 279 min read
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World Class Fisheries - The Driftless Area
The greatest density of spring creeks in the World in a unique cultural and geologic setting - what's not to love?

Jason G. Freund
Apr 619 min read
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My Driftless Bakers Dozen Fly "Concepts"
I figured I would do a Driftless Dozen as a conversation piece. These are my choices - at least when I wrote the article. What are yours?

Jason G. Freund
Mar 309 min read
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The Return of The Scientific Fly Angler Blog (sort of...)
The Scientific Fly Angler blog will be rolling out, in part, on the Coulee Region TU website. Please share these posts widely!

Jason Freund
Mar 12 min read
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Seasons of the Driftless (with Fly, Food, and Drink Pairings)
I present my idea of what the fishing seasons are in the Driftless Area and seasonal fly, food, and drink choices.

Jason G. Freund
Dec 15, 202410 min read
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Fisheries Management Topics: Mortality
Mortality - the word scientists give to the deaths of individuals - is not as simple as it might first look.

Jason G. Freund
Apr 6, 20218 min read
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Aquatic Insect Declines?
The question mark hopefully tips the reader off that there is some speculation but I will try to bring in some peer reviewed science, some data from Wisconsin streams, and personal experiences of myself and those I know that fish a lot in the Driftless Area. I am less familiar with what other parts of the state might be experiencing but I would interested in your comments about your experiences in the Driftless and elsewhere. (comment at the bottom of this post) Hexagenia lim

Jason G. Freund
Feb 2, 20219 min read
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The Re-Birth of the Driftless
A post on the history and flies of the Wolf River got me to thinking about the Driftless. As you see, the area and the trout fishing we maybe take for granted has not always been what it is now. In fact, it really was not that long ago that Driftless fisheries were mostly stocked and not self-sustaining like they are now. Today, over much of the Driftless Area, if it is a blue line on a map, it holds trout. It has not always been that way, a fact we should celebrate but also

Jason G. Freund
Jan 26, 20217 min read
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