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Re: foods and feeding
In a message dated 7/4/01 2:52:24 PM Eastern Daylight Time,
LeeH920226 at aol_com writes:
I have a question. Does the 24 hours or less refer to the time after
hatching
or the time after immersion of the cysts? For example, the eggs I have now
are quite old, but hatch very well in 36-48 hours at 80 degrees. Does this
mean I can feed them at 60-72 hours and get the nutritional value? It is
also
dependent on temperature, I would guess. Is there a way to know the
critical
time?
I don't have the information you request. I've always had the impression that
irrespective of time to hatching, brine shrimp use up their lipids, including
HUFAs, quickly and by the time they've molted and doubled in size, usually
within 24 hrs of hatching, that benefit is already gone. That's why the most
nutritious BBS are newly hatched. I have read this in a technical report
somewhere, but I think it dealt with a single type of brine shrimp and I
don't recall its hatching time. I don't think BBS with different hatching
times (and origins) were compared in that paper, and I don't know of a paper
that compared different BBS. You may want to check out
patrick.sorgelooth at rug_ac.be, which is the address of the Artemia Reference
Center. I presume it's still up and running.
Robert J. Goldstein, Ph.D.
Robert J. Goldstein & Associates, Inc.
Environmental Consultants
8480 Garvey Drive
Raleigh, NC 27616 USA
tel (919) 872-1174
fax (919) 872-9214
URL www.rjgaCarolina.com
e-mail rgoldstein at rjgaCarolina_com