Re: [RML] daphnia

Christopher Philip Benes (beneschr at pilot.msu.edu)
Fri, 14 Feb 1997 18:57:54 -0500 (EST)

> At ANGFA(Q) last night we had Steve Pyecroft (our fish vet i.e. "the
> Fishician") talking on fish nutrition and fish foods in as basic a way as
> possible. It surprised me to learn that fish in general get most of their
> energy from proteins and fats (especially the 3-omega ones) whereas we
> humans get ours from carbohydrates and fats. Obviously if the fishfoods
> have too much carbohydrate then it will tend to be stored as fat or end up
> in the substrate in whatever form (or name) you like to imagine :-)
>
> Bruce Hansen
> ANGFA
>
Actually my understanding from the aquaculture point of view is that fish are
only fed such high protien-low carbohydrate diets is because that has been the
'traditional' way of doing things. There is a lot of work going on right now
to find an effective carbohydrate diet for fish, because if fish are not
metabolizing protiens so much you get less nitrogenous waste (ammonia), and it
is easier to maintain water quality. However, like you said, if the diet is
too high in carbohydrates, you do get fish that have a lot of fat in them.
Sometimes if you buy fish at the grocery store that is hatchery raised it does
have an incredible amount of fat on it, because its been fed a carbohydrate
diet that wasn't quite right. Just my 2 cents worth.

Later...

If you didn't see it, you missed it.

Chris Benes
beneschr at pilot.msu.edu
http://www.msu.edu/user/beneschr/

Rainbowfish Study Group http://home.earthlink.net/~sbuckel/
Michigan Cichlid Association http://www.ole.net/mca/