| Popis: |
The effects of four concentrations of dodecyl benzene sulfonate at four salinity levels on adult Tisbe bulbisetosa were studied in laboratory experiments. The DBS solutions were analysed by the methylene method to control their stability with time. Results indicate that the effective concentration of DBS decreases within two weeks after preparation of solutions and the decreasing seems to be depending both on initial concentration and on salinity level. On the basis of the biological results, it was demonstrated that DBS is not the only toxic component of the domestic detergents; furthermore it was observed that salinity increases the noxiousness of detergent and vice versa. The results obtained are obviously restricted to the species Tisbe bulbisetosa , which however is a good example of organism, living in world–wide coastal waters, such as estuaries and lagoons, where it is frequent to find low salinities and high detergent pollution. |
