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Re: bioload
In a message dated 4/7/99 10:37:01 AM EST, K.Laidlaw@roe.ac.uk writes:
> > I haven't been concerned about the cyclops even I have heard they eat baby
> > fish. It just didn't seem possible. They are so small.
>
> Is it not hydra that pose a problem for young fry?
> Ken.
Both cyclops and hydra have been reported to eat fry, but I know for sure
that cyclops will only eat fry like new-born labrinth fry. Anything else is
too large. Cyclops will also wipe out a daphnia culture given the
opportunity, by consuming the freshly-hatched daphnia. I've seen Dave
Soares's tanks when they hve had major hydra outreaks, but he didn't seem
concerned about them. I saw a picture somewhere, I think it was one of the
ancient editions of the Inness encyclopedia, of a hydra with a fish caught in
its tentacles. It was magnified, and it is hard to say how small the fish
was, except that it had to be pretty darn small.
Bob Dixon
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