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Thread: New data suggests angler's felt soled boots NOT responsible for dydimo spread

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  1. #1
    Join Date
    Nov 2008
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    Rothschild (Wausau), Wisconsin
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    Default New data suggests angler's felt soled boots NOT responsible for dydimo spread

    Max Bothwell, a research scientist for Environment Canada, who wrote an influential article that linked angler's felt soled boots to dydimo spread has now reversed himself and said that anglers are not responsible.

    Here is his original article, On the Boots of Fishermen:

    http://www.env.gov.bc.ca/wat/wq/stud...ymo-blooms.pdf

    He now believes that dydimo has been in North American waters and that it is a change in water chemistry, specifically lower phosphorus levels that has caused dydimo blooms.

    Read the article in the current issue of American Angler, July-August, 2013, pp 8-9.

    "'I no longer believe the problem is North American streams is the result of it (dydimo) being moved around.' ?. Scientists are now convinced that dydimo lives in many streams, but blooms only when the water has far less than the normal amount of phosphorus?? The most damaging dydimo episode in the US seems to have been on Rapid Creek in South Dakota, where a six-mile bloom dramatically impacted a blue ribbon brown trout fishery. In 2007 and 2008, Bothwell and other scientists added phosphorus to sections of Rapid Creek. Sure enough, the dydimo mats shrank."
    Regards,

    Silver

    "Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy

  2. #2
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    Mountain Home Ar
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    If it was the felt soles, then you would have to ad the boot it self, the laces, and the inside of the boot.

  3. #3
    Join Date
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    Woodbine, MD
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    Quote Originally Posted by krauseb View Post
    If it was the felt soles, then you would have to ad the boot it self, the laces, and the inside of the boot.
    If you go directly from stream to stream without the boots drying, you're correct. Drying, however, kills didymo (unlike whirling disease spores), so those areas will be ok if you just dry the boots. The problem with felt soles is that they stay wet inside for weeks, making it much more likely that you're going to transport didymo for the stream you fished this weekend to the one you're going to fish next weekend.
    Bob

  4. #4
    Join Date
    Jan 2010
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    Cecil County Maryland
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    Figures............threw away 2 pair of felt sole boots.

    Manufacturers are loving this stuff.

    Since the bell has been rung, I would doubt that there would be any reversal on the position of things now.
    They will probably keep them outlawed.

  5. #5
    Join Date
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    Woodland, CA USA
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    easier to outlaw than to return...especially when something "sounds good". kinda like Affordable Care Act
    ‎"Trust, but verify" - Russian Proverb, as used by Ronald Reagan

  6. #6

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    Actually, nothing in what you quoted supports your thread title. He said that he no longer believe that didymo spread is the major threat, but nothing that you quoted indicates he no longer believes that didymo is not spread by felt soles and other angler's clothing. Rather, he said that the didymo has largely been spread already, and now it's just a matter of stream conditions which determine how active it is. Maybe there's something else in the article that supports the title (I haven't read it), but what you quoted does not.

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