出版社：Korean Society of Environmental Health and Toxicology
摘要：We explored collective behaviors of indicator species to elucidate the effect of the chemical stress. Afier the treatments of an insecticide,diazinon,at low concentrations (1.0 and 10.0 μug/L),spatial dispersion patterns of Daphnia magna were checked in a test chamber. The 1-index was used to characterize the movement data before (0~ 1 h) and after(1 ~ 2 h) the treatments in laboratory conditions. The slopes of the frequency distribution of l-index in semi-log scale decreased significantly,and the test populations appeared to be more dispersed with a lower degree of aggregation after the treatments. The index was feasible in indicating decrease in the ability of the specimens to keep desirable distances with neighbor individuals under chemical stress and showed a possibility of monitoring presence of toxic chemicals in environment through group behavior measurement.
