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Published by Dave Weaver [Dave_W] on 11/16/2017 (406 reads)
The chart below includes the total number of all macroinvertebrates in seine. The July sample in Letort may have been impacted by dense weeds producing a reduced number.

Screen Shot 2017-11-16 at 8.04.10 AM


This survey sought to identify macroinvertebrate populations in three different central PA stream types over the course of a year for the purpose of shedding light on nymph populations that might be of interest to fly fishermen. Three streams were chosen reflecting a freestone stream (Conococheague), a semi-limestoner (Yellow Breeches), and a limestoner (Letort).

I attempted to ensure that each kick seine survey was done in as close to the exact spot in the riffle each time I conducted the survey. These surveys were done in January, April, July, and early November. Although I don’t claim that this effort was entirely scientific, the results do shed some light on nymph numbers and characteristics. Moreover, the results bear out fly fishing conventional wisdom: that nymphs are more numerous and larger in springtime. In all three streams, the macro biomass was highest in April. The graph above reveals the fluctuation in the riffle by season. Of note, the Letort far exceeded the other streams in total biomass, although as one would expect, this difference was largely due to scuds and cress bugs. If one were to break out scuds and cress bugs from Letort, the number of nymphs would have been less than Conococheague. If you’re a limestone stream nympher, Letort in particular, scud and cress bug patterns are well known for a reason.

Among general observations of the streams’ combined results that I think merit note are a couple things:

1. The relative scarcity of stoneflies and caddis compared to the much more numerous mayflies.

2. The generally small size of these nymphs throughout the seasons, but especially in summer and fall. Most of these bugs averaged only about a quarter of an inch or less in body length (not counting tails) and would be imitated on hooks around #18 or less. Only the rare stoneflies and a few of the largest march browns would match a #14 nymph hook.

For comparison, the images below show the relative difference in size of nymphs in Yellow Breeches in April (upper image) and late November (lower image).

For more detailed information with bug numbers broken out by species and discussion, please feel free to check out the discussion in the Hatch and Entomology forum here.


Screen Shot 2017-11-16 at 8.04.33 AM

Screen Shot 2017-11-16 at 8.04.42 AM

Published by Dave Weaver [Dave_W] on 10/31/2017 (618 reads)
Susquehanna River, Lancaster Co., 10/21/17

WEATHER: Blue bird skies with highs in the 70s.

WATER: 3.2' at the Harrisburg gauge, gin clear, 60 degrees. A few boaters and yakkers but not a lot of activity.

HATCHES ETC: Nothing significant. A few scattered bugs, no rises; large schools of small minnows around 2" in length around shoreline areas. No crayfish seen. One bass caught in a riffle today had multiple caddis larva in his mouth and gullet. These caddis were dark colored and about #16.

Teamed up with Afishinado today to put some autumn hurtin on the Susky bass.
We arrived at mid day about 11am and fished until 5:30pm. It was a tough day. The bright sun and very clear water seemed to have the river switched off. We fished some very good sections with little success. Around 4pm, with the sun lower in the sky and softened by haze, the river seemed to wake up. We found active fish in fast water, mostly along current seams but also in shallow riffles. I had expected to find SMBs around ledge rock and and deeper tailouts today, but these spots didn't produce. The active fish were in pretty fast water. Had luck high sticking a helgy nymph and swinging a Clouser. I tried poppers briefly with no success. I managed about eight fish with three in the mid teens. Afish got fifteen bass with one at 18 inches.

A very nice day to be outside, but fishing was sub-par for what I'd expect on the big river in October. Nevertheless, with water levels still quite low, if you're a wading angler, the Susky is in great shape for FFing right now.

Members can follow along with comments in the forum here.

"Susquehanna>


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Published by Dave Kile [dkile] on 10/26/2017 (455 reads)
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Published by Dave Kile [dkile] on 10/05/2017 (1282 reads)
By Brian McGeehan at Montana Angler Fly Fishing

September in the greater Yellowstone region is quickly becoming one of the most popular times to visit and fish. September is a great time to fish Yellowstone National Park because water temperatures are dropping into the optimal range and trout feel the urge to pack on the pounds for the upcoming winter. Weather in September is usually very pleasant with cool, crisp mornings and warm afternoons. September is the only month of the year when literally every river in the Park is fishable. The Madison drainage has cooled enough for productive fishing but the high country streams are still warm enough for fish to be active. Throw in a few bugling elk and some fall colors and you have the recipe for a great trip. Let’s take a look at some of the highlights of September fishing in the park.

ynp_madison_fall_2016-35




Firehole River

As the weather cools, the Firehole once again becomes a viable option for fishing. At the beginning of the month, it may only be cool enough to fish in the mornings, but by the middle of September it should fish well all day. The main attraction during September is the White Miller Caddis, which typically emerges from mid morning until early afternoon. On cloudy days, especially towards the end of September, Blue Winged Olives emerge in the middle of the day. When no hatch is present, swing soft hackles through the riffles. I prefer drab, generic flies like a soft hackle pheasant tail or hare’s ear. In the fall, primarily due to low water, the fish in a Firehole can be a bit pickier than they were in June. Downsize your tackle a bit and take care not to spook fish with your movements.

Madison River
The main attraction on the Madison River in Yellowstone Park in the fall is the run of fish out of Hebgen Lake. While this run peaks in October and November, there will usually be some fish in the system in the latter part of September. The best way to target these fish is by nymphing or by swinging a streamer in a down and across fashion. No matter the technique, the key to catching these fish is locating where they are holding. These fish are used to a lake environment, so look for deeper, slower water. When nymphing, I prefer a stonefly nymph as my lead fly and small, nondescript mayfly pattern as my dropper. If I am swinging a streamer, I like the intruder style patterns that are popular with steelhead fishermen.

Lamar Valley- Lamar River, Slough Creek, Soda Butte Creek
Fall fishing in the Lamar Valley can be challenging due to low water and the cumulative effect of fishing pressure throughout the summer. On sunny, warm days turn to small terrestrials like ants or micro hoppers. On cloudy days, especially towards the end of the month, look for mayfly hatches of Blue Winged Olives or Tan Drakes. Plan on fishing a 5x leader that is a few feet longer than your standard 9ft length.

Yellowstone River
The Yellowstone River inside the park is a nice option in September as it falls off the radar for many once the famous stonefly hatches have ended. The river hosts an excellent Blue Winged Olive hatch, especially on cloudy days and towards the latter part of the month. Hopper patterns and attractors will still be your bread and butter for much of the month. September is a good time to start working in mayfly style attractors such as a purple haze or parachute adams as the fish may be a bit more selective than they were in July and August. A small streamer will fill the void if the dry fly bite slows.

Gardner River
The entire Gardner River should fish well in September, as the section below the Boiling River will have cooled sufficiently for all day fishing. In the early mornings, I like to nymph fish with a stonefly trailed by a attractor pattern like a prince or copper john. As the day heats up, small hoppers and various attractor patterns are your go to. Cloudy days will see hatches of Blue Winged Olives. Remember that the Boiling River essentially creates two separate rivers. Fall mayfly hatches will appear above in the cooler water first while hopper and attractor fishing will hold on longer in the warmer waters below. During the fall, keep in mind that there is always the possibility of a surprise up from the Yellowstone.

Fall fishing is truly one of our favorite windows for both Montana and Yellowstone National Park. Cool mornings and warm afternoons often produce the perfect blend of ideal water temperatures coupled with fall hatches and late season terrestrial fishing. The general family vacation season has slowed dramatically leaving the park to more serious anglers.

Brian McGeehan is a Pennsylvania native and has been guiding Western rivers in Montana, Wyoming and Colorado for 19 seasons. He is a licensed Montana outfitter and owner of Montana Angler Fly Fishing based in Bozeman, MT.
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Published by Dave Kile [dkile] on 08/28/2017 (26084 reads)
fall fly fishing


Fall fly fishing in the the region offers plenty of great opportunities. The cooler weather offers anglers some solitude of fly fishing while many are caught up with other fall activities. A little bit of preparation can be a rewarding opportunity for those who can make the time.

Reproduction plays an important part of the trout lifecycle during the fall months for both brook and brown trout. Brook trout, native to the US, usually begin to spawn during late September through October. Brown trout typically start spawning in October through late November. I have seen this go later too.

During the spawn coloring on the trout will intensify especially in the males. Females will often create gravel beds for the fertilized eggs called redds. It very important to be careful of these sections on streams when you see redds and not to kick them up when walking. Probably best even to leave trout overtop redds alone and give them a chance to protect the eggs.

fall fly fishingOften the water in the fall is low and gin clear. Spotting trout on a redd is pretty easy to see as in the photo to the left. The trout will sit over top of a small group of rocks that they have knocked around and they often will have a little more cleaned up look as if someone kicked up the spot. Take a little time before marching into the stream to check on the conditions. Good advice for any day.

As the trout begin to change so does the entomology or insect life in the stream. Activity will be different from region to region, stream size, earlier summer water temperatures, and geology. The fall provides a more limited selection of insects and often anglers enjoy bringing a more modest selection of flies and imitations. Some of the more popular collections include: Slate Drakes, BWO, Caddis, midges and terrestrials. Typical nymphs and streamers are very successful smart choice as well.

I like Dave Weavers suggestions for even looking for rainbows behind the redds feeding on eggs. Some small simple egg patterns can produce some pretty good results for these rainbows. The most common color for natural trout eggs are cream, pale orange and pink.

The full and fast spring streams can take a new characteristic once September arrives. Low clear water can create a challenge for some anglers, but stealth and patience can provide many rewards.

With summer holder over trout and newly stocked trout in many streams there should be ample opportunity for solitude and fish in autumn. Check out the PaFlyFish forums and stream reports to learn more about what is happening in your area.










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