Ref ID : 2831
A. Hillbricht-Ilkowska and Roger Pourriot; Production of experimental populations Brachionus calyciflorus Pallas (Rotatoria) exposed to the artificial predation of different rates. Polskie Archiwum Hydrobiologii (Pol.Arch.Hydrobiol.) 17(1/2):241-248, 1970
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Every 2-3 days 6, 25, 50, 75% of actual population size was removed (artificial predation) out of the cultures of Brachionus calyciflorus fed with Chlamydomonas. Together with the increase of predation rate: the average number of individuals, average life span, and the natural mortality decrease and the population fecundity, total yield and the efficiences - the ratios of the yield to the production and to the average number of individuals - increase.