Ref ID : 3455
L.A. Erman; [Cyclomorphosis and Feeding of plankton Rotifera]. Zoologichyeskiy Journal XLI(7):998-1003, 1962
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Brachionus calyciflorus Pall., kept in mass cultures, were fed with protococcus algae Lagerheimia ciliata, whose concentration was maintained at a certain level. The less the biomass of the feeding algae, the longer the hind lateral spines of the rotifera. The volume swept clear in longspined specimens was larger than in short-burred ones. The variable appendages of representatives of the Brachionus, Keratella and Kellicottia genera apparently serve for increasing the effective filtration activity of rotifera. They are a << brake >> which provides for relative immobility of the animals with relation to the food current they filter. A similar role is played by Ceratium spined.