Translation Series No.997

The graph shows that the data obtained were similar.
ka
(-2 b srenc..« Ç 40 11
pe-r 30 -
ro
/h niern.)
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0
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Figure 2.
e0 §0 711 09 74-i'0 I •
6110,vocca 0001'nocner2 L b,,,y17 d qc?'2 &wind--; / ■ 7
J/
Rotifer Brachionus calyciflorus feeding intensity
at various concentrations of food in the medium.
The points indicate data by L.A. Erman, the crosses
our data.
The reproduction rate for rotifer Brachionus calyciflorus
was studied by 2 methods: method of individual cultivation and
the population cultivation method.
The individual cultivation
method has been used before in the study of biological indices
of rotifers (Spemann, 1924; Jennings and Lynch, 1928;
Vasil'eya and Okuneva, 1961; Edmondson, 1960), We cultivated
rotifers in perforated glass (volume of bhe medium - 0.05 m1).
Observations were made daily, at which time the new-born i'otifers
were'placed in
fresh perforated glasses. By this method we
raised rotifers on 5 food concentrations: 0.1; 0.5; 1.0; 3.0,
and 5 million cd1F3 /m1, Figure 3 is a semi-logarithmic graph of
the growth and the number of specimens in parthenogenetic clones.
The points fell on straight lines, which is a proof of exponential
growth in all 4 cases.
In the fourth case it would be worthwhile
carrying out a longer test; the relationship is not sufficiently
clear due to the low reproduction rate. At a concentration of
0.1 million cel1p/m1 reproduction was completely undetectable.
The relative diurnal increase was calculated on the L.50.._