Abstract
Profile of food consumption and filtration rate of rotifer in relation to food Nannochlo-ropsis sp. density was observed. In addition, the feeding activity was analysed on the bases of balance of energy supply by food consumption and energy consumption by metabolism, especially at lower food density. Food consumption rate increased in proportion to food density at the density below 3×106 cells/ml. The rate was maintained at higher densities. Maximum filtration rate was observed at the food density of about 0.3×106 ?? 0.5×106 cells/ml, with accelerated and gradual decreases at food density below and above this level, respectively. Rapid decrease of filtration rate at food density below 0.3×106 cells/ml is closely related to the equilibrium between energy supply and consumption.
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