• protist@mander.xyz
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      2 months ago

      Pretty sure parasites are widely present among wild fish. Not defending fish farms, but parasites aren’t only present on fish farms

    • Chozo@fedia.io
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      2 months ago

      Pretty sure that’s a selection bias, since most fish that are eaten - or would otherwise be examined for parasites - are farm-raised fish.

        • huginn@feddit.it
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          2 months ago
          1. That article neither supports nor denies your claim: it just says parasites have evolved resistance to what was previously used against them.

          2. The major issue there is with the anti parasite treatment: that is what is killing herring.

          3. Parasites do not magically appear from nowhere. They are species which have co-evolved with their hosts for millennium. These fish parasites are extremely common across the entire ocean. Farms just provide a place for large groups of fish to get infected.

          All of which is to say that parasites in fish are common in wild fish which are never near farms.