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  1. #551
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    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by Cranefly View Post
    but still having a healthy grayling and trout population?
    and... Who decides what constitutes a 'healthy' population? There are long stretches of river with hardly a sniff of a fish (of any species) therein, and other, fewer, areas thick with fish.

  2. #552
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    Default Re: The (new) River Wye 2017 thread.

    I know they aren't Atlantic salmon - but the Fraser River fish in BC during the early 90s - and likely still today - used to produce runs of 25 million fish. That's just the sockeye salmon. There are half a dozen other sepcies too. At the same time, the Fraser River was castigated in the press as being the dirtiest river in the northern hemisphere.
    This colours my views on if clarity is really an issue.

  3. #553

    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by geoffmaynard View Post
    and... Who decides what constitutes a 'healthy' population? There are long stretches of river with hardly a sniff of a fish (of any species) therein, and other, fewer, areas thick with fish.
    Mapping those areas of no fish would be useful information to help determine the reason why. maybe run off issues at those locations ? Maybe not enough to affect the river as a whole but enough to cause unlivable habitat within ' x ' amount of distance below the source ? it would be interesting to isolate these areas.

  4. #554
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    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by geoffmaynard View Post
    and... Who decides what constitutes a 'healthy' population? There are long stretches of river with hardly a sniff of a fish (of any species) therein, and other, fewer, areas thick with fish.
    I was quoting Midway. As Dryline said it would be very useful to map the areas of abundance and lacking fish.
    "The sun was so delightfully warm, and the stone, which had been sitting in it for a long time, was so warm, too, that Pooh had almost decided to go on being Pooh in the middle of the stream for the rest of the morning."

  5. #555
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    Default Re: The (new) River Wye 2017 thread.

    We have electrofishing figures for a lot of the upper main river and main tribs of the Wye and the 50% decline in fry and parr seems to be pretty widespread.

    http://www.wyesalmon.com/wp-content/...ary-2016-1.pdf
    Last edited by stealth_fox; 03-04-2017 at 01:59 PM.
    The word 'politics' is derived from the word 'poly', meaning 'many', and the word 'ticks', meaning 'blood sucking parasites'

  6. #556
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    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by dryline View Post
    Mapping those areas of no fish would be useful information to help determine the reason why
    Well it's not rocket science. Bank craft will do. Given a period of clear low water; The fishy bits are generally those with deeps and features and weeds, sunken trees etc, places where the fish can hide from the predators. The shallow clear glides will be either devoid of fish or holding very small fingerlings not worth a predators effort. Dispersal of fish is predator-driven in clear shallow water. All IMHO of course

  7. #557
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    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by geoffmaynard View Post
    Well it's not rocket science. Bank craft will do. Given a period of clear low water; The fishy bits are generally those with deeps and features and weeds, sunken trees etc, places where the fish can hide from the predators. The shallow clear glides will be either devoid of fish or holding very small fingerlings not worth a predators effort. Dispersal of fish is predator-driven in clear shallow water. All IMHO of course
    Areas with good habitat hold fish - I think we can all agree with that.

    I thought, and I suspect Dryline too, that you were referring to miles of river without a sniff of fish rather than relatively short lengths of poor habitat.
    "The sun was so delightfully warm, and the stone, which had been sitting in it for a long time, was so warm, too, that Pooh had almost decided to go on being Pooh in the middle of the stream for the rest of the morning."

  8. #558

    Default Re: The (new) River Wye 2017 thread.

    Quote Originally Posted by Cranefly View Post
    Midway, how do you square the circle of implying salmon juvenile numbers are adversely affected by a massive FEB problem but still having a healthy grayling and trout population?
    Fair question - I would guess there is a higher number of savvy trout and grayling already in place.
    Parr are easy pickings for FEBs (and anglers - I've caught one more parr than wbt this season, which is to say, one).
    Chairman: Groe Park and Irfon Angling Club.

  9. #559
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    Default Re: The (new) River Wye 2017 thread.

    The older "savvy" trout and grayling were young once too!
    "The sun was so delightfully warm, and the stone, which had been sitting in it for a long time, was so warm, too, that Pooh had almost decided to go on being Pooh in the middle of the stream for the rest of the morning."

  10. #560
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    Default Re: The (new) River Wye 2017 thread.

    From the available evidence it does seem that the overall 50% fall in the salmon fry and parr population isn't mirrored in the Brown Trout population. Are there any notable 'cool spots' for trout Cranefly?
    The word 'politics' is derived from the word 'poly', meaning 'many', and the word 'ticks', meaning 'blood sucking parasites'

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