RE: [RML] Ceriodaphnia

Adrian R. Tappin (atappin at ecn.net.au)
Tue, 02 Jun 1998 06:17:27 +1000

Here is some more information for anyone culturing any of these critters:

Nandini Iyer and T.Ramakrishna Rao; Effect of the epizoic rotifer Brachionus
rubens on the population growth of three cladoceran species. Hydrobiologia
255/256:325-332, 1993.

"Using population densities and growth rates as criteria, we studied
interactions between the epizoic rotifer Brachionus rubens and each of three
cladoceran species differing in size and reproductive rates -Daphnia carinata,
Moina macrocopa and Ceriodaphnia rigaudi. In all mixed- species experiments, B.
rubens existed in both the epizoic mode, attached to the cladoceran host,
and in
the free-swimming mode. Rotifer population growth rates were significantly
depressed in the presence of M. macrocopa, presumably as a consequence of
exploitative and interferenece competition. The largest cladoceran, D. carinata
probably did not suppress B. rubens, because the epizoic component of the
rotifer population escaped from the deleterious effects of mechanical
interference. Peak population numbers and initial population growth rates
reached by all three cladocerans were lower in the presence of B. rubens,
probably because of the adverse effects of the epizoic infestation, which was
maximal on D. carinata and least on C. rigaudi. In mixed-species cultures of D.
carinata and M. macrocopa, the presence of B. rubens helped D. carinata coexist
with M. macrocopa, which otherwise would have suppressed the Daphnia."

Adrian.
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Adrian R. Tappin
"Home of the Rainbowfish"
http://www.ecn.net.au/~atappin/home.htm
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