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  1. #1
    Join Date
    Feb 2013
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    Default Calcium carbonate?

    Cast your minds back please. Some years ago I read a very interesting piece about adding chalk or calcium carbonate or something similar to rivers to improve them for insect life. I seem to recall vaguely that it was by a relative of a forum member here. Any ideas who it was and where I can get some information on it? I am old enough to remember when the farmers got a grant to "sweeten" the fields with chalk. I'm convinced that our insects were bigger then. I found an old fly box of mine in the garage recently and my old large dark olives are on #12 hooks, these days we tie them on #14 and 16s.
    Any information gratefully and greedily accepted.

    S.
    Not only am I a master of suspense, but I

  2. #2
    Join Date
    Mar 2011
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    devon
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    3,509

    Default Re: Calcium carbonate?

    I may be wrong but I think there was a program some years back where lime was added to river headwaters somewhere in the U.K. It may have been Wales, the idea was to counteract acid rain/runoff and had some good results. Couldn't find the environment agency stuff but this link has some bearing.

  3. #3
    Join Date
    Jan 2011
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    North Kent
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    629

    Default Re: Calcium carbonate?

    Look at the wye and usk foundation website. Liming headwaters is a big part of their work. I think it's the Irfon currently they do it to.
    You will also find evidence of the success of the method.
    Dan

    Sent from my GT-I9300 using Tapatalk

  4. #4
    Join Date
    May 2006
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    Up to my eyes in it!!!!
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    9,043

    Default Re: Calcium carbonate?

    As already stated it was used mainly to counter the effects of acid rain. Loads of places in Dumfries and Galloway had to be treated. I believe Norway had a huge programme at work as well. Trying to clear the pollution carried on the SW from the "dirty old man of Europe" (UK) over to them.
    It is in truth not glory,nor riches, nor honours that we are fighting,but for freedom - for that alone, which no honest man gives up but with his life.(Declaration of Arbroath, 1320)

  5. #5
    Join Date
    Feb 2013
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    Default Re: Calcium carbonate?

    Thanks guys, sand liming seems to be close to what I read previously. I'm still looking for the original article so if anyone else out there remembers please jump in with a link or any information at all. Lepirate, I can't see your link I'm afraid.

    regards all,
    S.
    Not only am I a master of suspense, but I

  6. #6
    Join Date
    Mar 2011
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    devon
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    3,509

    Default Re: Calcium carbonate?

    [QUOTE=splinters;1687737]Thanks guys, sand liming seems to be close to what I read previously. I'm still looking for the original article so if anyone else out there remembers please jump in with a link or any information at all. Lepirate, I can't see your link I'm afraid.

    regards all,
    S.[/QUOTE

    ]http://link.springer.com/chapter/10.1007/978-94-009-7284-1_17#page-1
    and,
    http://voices.yahoo.com/the-effects-...he-154012.html


    sorry,
    Last edited by lepirate; 03-11-2013 at 10:49 AM.

  7. #7
    Join Date
    Feb 2013
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    Co. Armagh.
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    1,636

    Default Re: Calcium carbonate?

    Thanks for that,

    S.
    Not only am I a master of suspense, but I

  8. #8
    Join Date
    Jan 2011
    Location
    North Kent
    Posts
    629

    Default Re: Calcium carbonate?

    I think the widespread planting of conifers around upper catchments was a factor for wuf

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  9. #9
    Join Date
    Oct 2007
    Location
    Wiltshire
    Posts
    7,640

    Default Re: Calcium carbonate?

    There was a series of articles by Frank Sawyer in Trout & Salmon back in the 1960's I believe. The title was "Is chalk all important to trout growth?"

    He put chalk into the Avon - a chalkstream(!) - and claimed it improved invertebrate production and trout growth. Never seemed to enter his head that he already had a highly fertile environment.

    There is a substance called "Siltex" which it is claimed speeds up the breakdown of organic matter - leaves and dead weeds etc - in a stillwater. Nothing has been definitely proved.

    Bear in mind that if you have an acidic river/stillwater then turning it into an alkaline one overnight is going to do a whole lot more harm. If it ain't broke, don't mess with it is a very valuable saying when it comes to fisheries management.

  10. #10

    Default Re: Calcium carbonate?

    Quote Originally Posted by BobP View Post
    There was a series of articles by Frank Sawyer in Trout & Salmon back in the 1960's I believe. The title was "Is chalk all important to trout growth?"

    He put chalk into the Avon - a chalkstream(!) - and claimed it improved invertebrate production and trout growth. Never seemed to enter his head that he already had a highly fertile environment.

    There is a substance called "Siltex" which it is claimed speeds up the breakdown of organic matter - leaves and dead weeds etc - in a stillwater. Nothing has been definitely proved.

    Bear in mind that if you have an acidic river/stillwater then turning it into an alkaline one overnight is going to do a whole lot more harm. If it ain't broke, don't mess with it is a very valuable saying when it comes to fisheries management.
    Yes, indeed.

    I do indeed wonder what goes on in the minds of some fishery managers.

    I recall reading about the lice outbreak on loch Fad, and the fishery manager stating that they were trying to do everything they can, and were ordering all visiting anglers to dip their nets on arrival.

    The lice are endemic and bloom when the conditions are right, ie; temperature and food source, and it just coincides with the fact that when the water is warm there are fish being stocked.

    Dipping nets will do nothing to prevent or curtail a lice infestation, for sure nets aren't the cause.

    I don't understand why these fishery managers are not better advised?

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