要約

The influence of the solutions of hydroquinone, the concentration of which accounted for 2, 5, and 10 their limiting permissible concentrations for fishery (LPC_f), on the content of urea in the homogenates of the mantle and gills of Unio conus was investigated after 1, 7, and 14 days of its exposure in the toxic media. At the studied concentrations of hydroquinone, the content of urea in the gills of the mollusk decreased by 55.6−68.9%, whereas its content in the mantle of the mollusk decreased by 16.5−39.2% as compared to the control variation. Dynamics of this process were as follows: during the first day this index sharply decreased and then remained unchanged until the seventh day. From the seventh day until the fourteenth day, this index sharply decreased again.