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Thread: Ugly salmon?

  1. #11
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    Default Re: Ugly salmon?

    Research on the river Polla (at the head of loch Eriboll) in the early days of fish farming showed that almost all of the juvenile salmon in the river were of farmed origin. This was determined (if I remember correctly) by traces of the food dye fed to the female farmed salmon being passed into the eggs and detectable in the fry/parr.

    There were even a few fish farmers who claimed the mass escapes would lead to a huge upturn in salmon numbers in the local rivers because of the increased number of spawners but it didn't quite work like that did it!

    Whether the escaped salmon swim up the nearest river or not is probably dependent on how mature they are when lost as well as river heights. Many probably just go wandering aimlessly in the sea and possibly tag along with any shoals of wild fish they bump into. Several small (3.5lb) farmed fish have turned up in North coast rivers this year and they are largely held to be "organic" farmed salmon from Orkney, they are surprisingly good looking fish with very little fin damage or deformity but are very spotty.

  2. #12

    Default Re: Ugly salmon?

    Quote Originally Posted by bobmiddlepoint View Post
    There were even a few fish farmers who claimed the mass escapes would lead to a huge upturn in salmon numbers in the local rivers because of the increased number of spawners but it didn't quite work like that did it!
    That could tie-in with the folk who know what they are talking about saying that although salmon numbers are down, there are still enough to fill the available redds. So, all the other adult salmon are surplus, and it is just a question of how many surplus adults are there. If there are a lot, then anglers have a good time. If there are very few, then anglers have a very lean time. It all comes down to egg/fry/parr/smolt survival rates, not numbers of returning adults. That is why they say the whole mandatory catch and release of adults thing is a strawman. Maybe?

    Col
    Please note that any views expressed in this post may be those of the
    originator and do not necessarily reflect those of the reader.

  3. #13
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    Default Re: Ugly salmon?

    Quote Originally Posted by pentlandflyman View Post
    This is going to sound silly but i don't fish for salmon or take an interest in salmon fishing so would farmed salmon know to enter a river to spawn ?
    Yes, they run up rivers, I've caught them. Not sure if they just head for the nearest river, or find a passing wild fish and follow them.
    They don't fight near as well, a strong first run they you can virtually just wind them in.
    Malcolm
    <')\\\\\<<
    Quot homines tot sententiae

  4. #14
    Join Date
    Nov 2010
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    Default Re: Ugly salmon?

    when I worked at a local hatchery all our stock were triploided,it gives them faster growth,escapees would make the wild stock waste their milt or eggs at the redds, if they got together, easker1

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