Translation Series No.997

11.
Up to maximum ration the assimilation dropPed much more
slowly than the ration was increased, and the growth P was
tripled.
The case where assimilation remains constant while
the ration is increased cari be explained by the tendency "to
sacrifice efficiency for greater production" (Odum and Pinkerton,
1955). Lotka (A.J. Lotka, 1925) suggested the law of
energy maximum for biological systems. He considers that the
most important factor in the survival of the organism is the
great expenditure of energy in the form of product;
he calls
the greatest yield of product the criteria for survival of
systems of different types. Insofar as the efficiency of
utilization of food is concerned, this is usually expressed
by small values. Odum and Pinderton have demonstrated very
well in a model of anEnergy system that even under the best
conditions the ratio of growth to ration does not exceed 50%.
A study of the coefficient of utilization of food for growth
by young growing stages of some aqueous creatures (protozoa,
worms, mollusks, fish) gave almost coincident values which
fluctuated around 30%, which goes to prove that these values
are stable and change little even with changes in temperature
over a very wide interval (Ivlev, 1937, 1938). In those natural
communities where there is little food, a more efficient utilization
of food by organisms predominates.
CONCLUSION
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A relative value for diurnal growth in population,
equalling 175% wa
obtained during laboratory cultivation of
rotifer Brachionus calyciflorus Pallas. The purpose of the