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Re: Rock Snot Discovered in the Yough

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2009/2/11 13:14
From Lehigh Valley
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i know for a fact that in Maine where i fish , a website under the direction of Kevin McKay guide/website forum owner actually has taken it a step further they have boot stations set up that you take the cover off an step into for a few seconds there is light bristled brush with a chain attached too to wash ypour woots real good also you can dunk your waders too, theres stuff in there that kills the didymo on contact wash before you get in wash when you get out.
He ought to get a conservation medal for that.
There is also clearly identifiable pictures of the stuff an instructions on how to clean yer gear properly.

Posted on: 2012/6/5 11:43


Re: Rock Snot Discovered in the Yough

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2006/12/29 10:00
From Harrisburg
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This stuff sucks for all, but especially for people like Alby, Jack, and Ryguy.....what a blow. Trout streams just arent around every corner out there.
Felts will surely be banned now as they should have been. Also carpets on the guiding posts of boat trailers would be a good idea.
Anything that can absorb and hold this stuff.

Posted on: 2012/6/5 11:43
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Re: Rock Snot Discovered in the Yough

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2008/1/31 17:19
From Pretty much everywhere at some point, Thorndale today.
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There is no solution beyond somehow poisoning it (which would likely poison everything else too).

Likewise, a felt ban will almost certainly not stop the spread. It may slow the spread, which would be looked at as a victory. But since it's not only felts that spread it, but also natural forces like birds, it is almost certain that virtually every waterway will be exposed to it eventually.

How soon, and how much impact will it have are open questions.

Posted on: 2012/6/5 11:44


Re: Rock Snot Discovered in the Yough

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2008/1/31 17:19
From Pretty much everywhere at some point, Thorndale today.
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Quote:
Anything that can absorb and hold this stuff.


Shoelaces, leather, dubbing on flies, carpeted boats, and the list goes on. :(


Posted on: 2012/6/5 11:48


Re: Rock Snot Discovered in the Yough

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2012/3/14 23:03
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Does the Youg have frack withdrawals? Wonder what the regs are for clean freshwater trucks that frequent multiple bodies of water? None probably. Kayakers probably contribute to the spread more than fisherman. They will hop from stream to stream to river to river, in higher water flow periods to run pieces of water that are generally not viable. Sometimes this will happen the same day.

Posted on: 2012/6/5 12:08


Re: Rock Snot Discovered in the Yough

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2011/1/15 18:21
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Well, this pretty much ruined my day. For those of us(me) who are ignorant of the entire scope of destruction, how devastating is this? Does it severely reduce fish population etc. or does it just turn streams into gross snotty messes, but doesnt seriously affect fish populations?

Posted on: 2012/6/5 12:44


Re: Rock Snot Discovered in the Yough

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2008/1/31 17:19
From Pretty much everywhere at some point, Thorndale today.
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I think the extent of destruction is still an open question, and likely to vary from place to place.

Once infected, the stream pretty much always has it, but might not always show symptoms. Then, when and where conditions are right, you get a "bloom". These blooms are going to vary by stream and even location within a stream, it might be minor in some places, and a continuous mat in others. Even after the bloom ends, the stuff sticks around a few months as it breaks down.

Here's a pic often shown. New Zealand, I think. This would be like the worst bloom ever. I don't think we've really seen this level of devastation locally, yet anyway. In fact, the local places that have it have thus far had very little measurable impact, just a nuisance. But serious outbreaks like this are possible.

Attach file:



jpg  didymo.JPG (20.54 KB)
1353_4fce3f28db860.jpg 390X394 px

Posted on: 2012/6/5 13:17


Re: Rock Snot Discovered in the Yough

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Sweet Jesus! That certainly is a worst case scenario--it looks like a nuclear holocaust.

Pcray, indulge me if you dont mind because wikipedia didnt offer much information on the subject. Why is this algae more prevalent in coldwater streams? I have always known algae to thrive in the warmest water possible. If water temps play a large role in the survival of this species, will we see its presence less and less as we travel downstream on the yough(water temps rising)? Finally, what causes those massive blooms, and has anything like that ever happened in the delaware?


Posted on: 2012/6/5 13:39


Re: Rock Snot Discovered in the Yough

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2006/10/18 15:46
From Patterson twp, Pa (Beaver Falls)
Posts: 6528
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Quote:

pcray1231 wrote:
There is no solution beyond somehow poisoning it (which would likely poison everything else too).

Likewise, a felt ban will almost certainly not stop the spread. It may slow the spread, which would be looked at as a victory. But since it's not only felts that spread it, but also natural forces like birds, it is almost certain that virtually every waterway will be exposed to it eventually.

How soon, and how much impact will it have are open questions.



I've been curious lately as to which waterway they'll try a poisoning/treatment in first. It's only a matter of time before they test out some theories on how to get rid of this stuff.

I bought my first pair of rubber soled boots last month. Felt very comfortable compared to felts.


I've fished like 5 times total this year, so it sucks less for me than those who are avid Youghers. I was planning on getting to know that stream a bit more here in the near future.

Posted on: 2012/6/5 13:42
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Re: Rock Snot Discovered in the Yough

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2006/10/25 12:30
From York
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The last that I heard, it likes cold water with low phosphorus content. Didymo has a way of concentrating the phos so it can grow easier and out compete the "native" species. It is sort of like it makes it's own fertilizer.

Posted on: 2012/6/5 13:46
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Re: Rock Snot Discovered in the Yough

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2008/6/11 8:53
From Hanover
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Take a look at this video shot by a guide on the Gunpowder River. It really puts it into perspective.

http://vimeo.com/39075187



Posted on: 2012/6/5 13:49


Re: Rock Snot Discovered in the Yough

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2011/8/15 15:02
From Bethlehem, PA
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pcray - I saw it nearly as bad as your picture in the South Branch of the Holston. That was several years ago before I was even aware what the stuff was.

Posted on: 2012/6/5 13:59
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Re: Rock Snot Discovered in the Yough

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2008/1/31 17:19
From Pretty much everywhere at some point, Thorndale today.
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Quote:
Why is this algae more prevalent in coldwater streams?


Well, first, I don't think it's true that normal algae likes warmer water. The limestoners are rich with algae and tend to be cooler than non limestoners. That's why you always have that milky color, or at least green, rarely are they gin clear very far from their source. In the ocean, algae blooms often occur in polar regions.

What it likes are excess nutrients. Phosphorus, in particular. Combine that with sunlight and you have conditions ripe for normal algae.

Like all organisms, different types of algae compete against each other, and hold each others populations in check. Didymo has evolved to escape this competition by thriving in nutrient poor waters and being able to survive periods long without much sunlight. It also is very hardy and can tolerate heavy current.

What conditions favor it? I'd assume low water, lots of sunlight would stimulate growth. And the streams where it'll be worst are nutrient poor, fast streams, where other algae doesn't do so well.


Posted on: 2012/6/5 14:16


Re: Rock Snot Discovered in the Yough

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2006/11/10 8:32
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The milky green color in limestoners is most likely caused by suspended clay particles directly or caused indirectly by their refraction of certain light waves. You'll note that there seems to be a lot of clay associated with limestone streams and in limestone caverns. It takes a lot of energy to get clay particles into suspension via erosive forces, but very little energy to keep it suspended (less than silt, sand, etc).

Posted on: 2012/6/5 16:19


Re: Rock Snot Discovered in the Yough

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2006/11/10 8:32
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Didymo has already caused problems for Pa anglers. It was apparently Didymo that was a problem for shad anglers using downriggers well downsream in the Delaware system (Lehigh Valley area) this spring as lines were being fouled by what was thought to be loose strands of Didymo in the water column. This problem had never occurred in any previous year. Accumulated strands eventually would clog rod eyelets while anglers were reeling in their lines to the extend that the lines would not pass through the guides until the material was removed.

As for other experiences, I am now aware of a biologist who will not return any longer to her home state to fish for trout because of the problem that Didymo causes for her angling.


Posted on: 2012/6/5 16:27



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