Ultrics that farm?

Sean Mallory (smallory@ouray.cudenver.edu)
Thu, 28 Mar 1996 15:09:06 -0700

While it initially sounds strange that daphnia would do well around
ultrics, consider the advantage to the ultric that harbors the
daphnia. Growing your own lunch isn't such a bad idea... it's very
reliable -- probably advantageous on both the good (seed bearing) and
the bad (vegetative repro only) years, and thus able to take over any
particular locality fast. I'm pretty certain that this it is not the
rotifers -- that would not have provided the surprise to me that made
the information memorable.

Who was it on this list that mentioned growing ultrics in clear
containers? Do they have daphnia (or other similarly behaved
crustacians) in with them? Have they tried introducing them?

Sean Mallory smallory@ouray.cudenver.edu
Denver, CO, USA http://ouray.cudenver.edu/~smallory/

-- You cannot walk on water, you can only run. -- A basilisk instinct.

Reply to:
From: lcochran@midway.uchicago.edu (Liane Cochran-Stafira)
While I can see the benefit of having utrics in a breeding tank to
provide cover for the fry, the Daphnia part sounds strange. I was always
under the impression that Daphnia are a favorite menu item for these
plants. On the other hand there are some symbiotic rotifers that make
their homes inside the traps of some species - hmmm. I wonder if the
aquarium reference has the species reversed.