Nishikigoi International: Re: toxin absorption through koi skin

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Re: toxin absorption through koi skin

Posted by Michael Van Neste on 5/14/2009, 8:47 am, in reply to "Re: toxin absorption through koi skin"
212.9.29.106

Hi James

This is my take on it: the lining of the gut, like the external skin (which it so closely resembles) is protected by a mucous layer. This layer is principally in place to block the passage of gut bacteria, which are toxic, through the gut wall and into the bloodstream. On the other hand it does not block the passage of nutriants and, if present, chemical toxins. I believe that very little pondwater actually enters the gut.

I suggest that the mucous layer on the skin has a similar function, affording protection against bacteria and parasites, whilst permitting some osmosis of pondwater. I always understood that the kidneys of koi were constantly dealing with this intrusion. As you point out, it is when the mucous layer is heavily compromised and/or the kidneys diseased that problems arise.

I accept, of course, that the gills are also much involved. But are they the whole story?

Michael

toxin absorption through koi skin - James Guiler 5/14/2009, 1:04 pm
- Re: toxin absorption through koi skin - Michael Van Neste 5/14/2009, 2:03 pm

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