Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Here Oksrukuyik Creek flows away from the Dalton Highway toward the pipeline. It eventually grows into one of the major rivers of the North Slope, and the main drainage to the west of the Sag, but where it crosses the road it's just a small grayling stream.

From Oksrukuyik Creek in Alaska

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Sex changes in smallmouth bass

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Apr 22, 2009April 22nd, 2009, 1:57 pm EDT

Article

Not terribly conclusive, but something fishermen should be aware of.

-Shawn

Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Apr 22, 2009April 22nd, 2009, 6:53 pm EDT

Hmmm. Perhaps these "scientists" should try going upstream until they are no longer finding smallmouth bass which display this anomaly. Mostly kidding, of course.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Apr 23, 2009April 23rd, 2009, 12:26 am EDT

Well put, Roger. I would hope they'd have thought of that, but the article does make them seem a little bumbling, doesn't it? Hopefully that's just the layman's media oversimplifying their research. The article does have a certain why-are-you-telling-us-what-you-don't-know sort of humorous tone, though.

If they do go long enough without finding a likely cause, they could always just hazard a guess that it's CO2. That would settle the issue in the minds of most and ensure lots of future funding...

-Shawn

Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com