Moraitou-Apostolopoulou, M. & G. Verriopoulos. (1982). Toxicity of chromium to the marine planktonic copepod Acartia clausi, Giesbrecht. Hydrobiologia. 96(2):121-127, fig. 1, tabs. 1-3. (15-x-1982).

75029

10.1007/BF02185427 [view]

Moraitou-Apostolopoulou, M. & G. Verriopoulos

1982

96(2):121-127, fig. 1, tabs. 1-3. (15-x-1982)

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The toxicity of chromium to the marine planktonic copepodAcartia clausi, Giesbrecht was studied. The LC50 48 h values (concentration of chromium lethal to 50% of the test animals) vary with the experimental temperature, the form of chromium compound tested and the annual generation to which theAcartia specimens belong. The elevation of temperature resulted in a considerable increase ofAcartia's sensitivity to chromium. Cr6+ in the form of Na2CrO4 was more toxic toA. clausi than in the form of CrO3 · Cr3+ in the form of Cr(NO3)3 9 H2O precipitated to the bottom and was not toxic toAcartia.Acartia specimens belonging to the summer generation were more sensitive to chromium than those belonging to the winter or autumn generation. The exposure ofAcartia to sublethal concentrations of chromium resulted in a reduction of its longevity proportional to the chromium concentrations used. Furthermore, whenA. clausi was exposed to sublethal chromium concentrations it showed a decrease of feeding capacity and increase of respiratory rates, which became more pronounced with increasing chromium concentrations.

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