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Contemporary Problems of Ecology

2013 year, number 6

Influence of Heavy Metals on Feeding Rate of Daphnia magna under Different Feeding Conditions and Age of Crustaceans

T. L. SHASHKOVA, Yu.S. GRIGORIEV
Siberian Federal University, 660041, Krasnoyarsk, Svobodniy ave., 79
Keywords: bioassay, heavy metals, Daphnia magnа Straus, 1820, feeding rate, Chlorella vulgaris Beijer, chlorophyll fluorescence

Abstract

The influence of Daphnia exposure conditions on the feeding rate and sensibility to heavy metals was studied. To record the feeding rate of Daphnia, we used the changes of the intensity of zero level of rapid fluorescence of alga which was used as feed. The optimal conditions (stocking density, the age of test organisms, feeding schedule and exposure time) which provide the high level of feeding rate and sensibility of Daphnia to pollution were determined. The experiment design proposed includes at first the exposure of Daphnia to the toxic pollutant, and then Chlorella suspension is introduced into water solution.