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  1. #21
    Thanks for the comment and support gents.

    I believe on this occasion I will keep the defective fish. As I grow from my youth I have a new acceptance of imperfections, providing they’re pain free and don’t risk the other fish I am happy to keep them.


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  2. #22
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    Hi

    the defects could be genetic or could be an indicator that the environment isn’t ideal, what you tend to find is that the incidence of young fish developing defects is greater when there is a higher stocking density or the water conditions deteriorate as the load on the system increases... it is natures way of thinning down excess numbers..

    Dave

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  4. #23
    Senior Member Rank = Jussai RS2OOO's Avatar
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    Quote Originally Posted by Davej View Post
    Hi

    the defects could be genetic or could be an indicator that the environment isn’t ideal, what you tend to find is that the incidence of young fish developing defects is greater when there is a higher stocking density or the water conditions deteriorate as the load on the system increases... it is natures way of thinning down excess numbers..

    Dave
    Never thought about it like this before and when separating a single spawning into different tanks the final results/fish with issues seem to be about the same, except one tank may have higher average growth which I have witnessed but cannot explain.

    Surely bent spines, missing gill covers, missing eyes etc would be birth defects would they not?

    I could understand cloudy eyes as being either genetic or environmental, but wouldn't know how to prove one or the other.

    My Goldfish almost always die of dropsy (usually at a ripe old age may I add), and I assume this likely to be environmental / tap water related.

  5. #24
    Extreme Koi Member Rank = Jussai bowsaw's Avatar
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    there's no reason the one with a missing operculum won't continue to be fine, just not attractive in most peoples eyes, I have an adult that also lacks an operculum on one side, its fine and dandy and I have no plans to move it on, same with the lack of eyes, carp eyes are not that important, they use their lateral line far more then the eyes, again most would be unhappy by the look, but no reason the fish won't grow as normal aside from the lack of vision
    the slow pond build thread

  6. #25
    Hey all, quick update. Thanks for your assistance so far, all appreciated.

    The fry are doing well and some are well over 6” now. Apologies for the green water, Saturday is water change day. No fatalities yet. I also kept the few that gave birth defects as I will have them in my own pond.

    Does anyone recognise what type of koi they might be yet ? Also, as a side note. What month should I expect to get the outdoor pond to 14oC when I can take them outside ?

    All the best, hope we are all well !




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