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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington
Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
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.
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Motrout
Motrout's profile picture
Posts: 319
Motrout on Oct 22, 2010October 22nd, 2010, 3:11 am EDT
There is a little wild trout stream that I was planning on leaving for this afternoon to fish it for three days, but the USGS gauge says it is just absolutely dead low- I should have known...I can't remember the last time it rained.

I know that will mean tough fishing, but I'm not too worried about that. My question is, does fishing for trout in very low water cause too much stress on the fish? I know not to fish for trout when the water is too warm, but I'm not sure about what the effect is when you're fishing a stream with very low water, but also low water temps. I don't want to be hurting anything, but I'd like not to have to cancel the trip if I can possibly avoid it. What do you think?
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/
RleeP
NW PA - Pennsylvania's Glacial Pothole Wonderland

Posts: 398
RleeP on Oct 22, 2010October 22nd, 2010, 3:54 am EDT
Its a judgment call..

Trout in very low water are more exposed to the general run of predation (heron, mink, snakes, whatever) and as such, "may" sometimes be forced to expend more energy than they would otherwise, a potential source of "stress", I suppose.

By and large though, if it is a healthy stream with reliably cold flows and some gradient, dissolved oxygen and the stress that the lack of same can cause in trout isn't going to be a factor. If I remember my HS physics correctly, water's ability to provide DO is somewhat temperature dependent and cold water has more DO.

All in all, I don't think it would be a bad thing to fish this stream under low flow conditions. If its like most streams I've fished when they are very low, you'll be in more danger of trauma from stress than the fish..:)
Motrout
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Posts: 319
Motrout on Oct 22, 2010October 22nd, 2010, 4:54 am EDT
The water should be plenty cold-and it does have some riffles to oxygenate the water. I guess I'll give it a shot.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/
SlateDrake9
Potter County, PA

Posts: 144
SlateDrake9 on Oct 22, 2010October 22nd, 2010, 4:58 am EDT
Water temp is the factor I'd worry about for the fish.

But, you have to ask yourself, how much fun will the stream be to fish if it is that low? Is it deep enough for the fish to fight back? Enough water/current to get a drift? Enough water to fish in anything but the deepest holes, which probably aren't all that deep if it's that low?
Fishing with bait is like swearing in church.
-- Slate Drake
PaulRoberts
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Colorado

Posts: 1776
PaulRoberts on Oct 22, 2010October 22nd, 2010, 7:19 am EDT
Go!
Oldredbarn
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Novi, MI

Posts: 2600
Oldredbarn on Oct 22, 2010October 22nd, 2010, 7:38 am EDT
I agree with Paul...This time of year when the waters down the fish are in all those places where you would think they might be...You will be able to see the deeper runs etc and floating a fly over that is exciting...

You will stick out like a sore thumb to these fish so it won't be like taking candy from a baby, so think "far & fine".

Don't over play the fish and take something to measure the water temp...I think it's called a thermometer.

Spence

Maybe as a side note...If you see a brookie's spawning bed, you may want to move on and let them get about the work at hand.
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Ericd
Mpls, MN

Posts: 113
Ericd on Oct 22, 2010October 22nd, 2010, 10:27 am EDT
What I like about "visiting" and/or fishing a stream in low water is being able to see the underwater structure much better so I can better fish it when the water is up to whatever normal is. I know all of that changes from season to season and flood to flood, but a lot of it doesn't seem to change that much. I say go for no other reason than research.
Adirman
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Monticello, NY

Posts: 479
Adirman on Oct 23, 2010October 23rd, 2010, 12:48 am EDT
I'm with what What ericd said!! Whe the water's low, you can go simply to observe structure(and fish, of course!)so that in higher water, you get a better idea where the big holes are, large obstructions like rocks, etc., that is, if you can remember!
Bobbyg
North Carolina

Posts: 36
Bobbyg on Oct 23, 2010October 23rd, 2010, 10:47 am EDT
Just me, and you guys can do whatever you feel is best, but I just don't fish for small stream fish when the water is almost depleted.

I agree that it is a good time to just observe the stream.
"Many men go fishing all of their lives without knowing it is not fish they are after."

- Henry David Thoreau
Motrout
Motrout's profile picture
Posts: 319
Motrout on Oct 24, 2010October 24th, 2010, 9:13 am EDT
I did go, and I was really surprised when I got there- I think there may have been a problem with the USGS gauge or something, because the water was really just a little below normal and 55 degrees. Nothing even remotely concerning.

In any case, the fishing was great. The trout were up in the riffles and slamming attractor dries all day long. Fun stuff.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/

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