Abstract
The harpacticoid copepod Nitocra spinipes has been tested for acute toxicity of 12 metal chlorides in brackish water. Their order of toxicity, expressed as 96 h LC 50, was in good agreement with other investigations performed in freshwater and seawater. The 96 h LC 50-values were of intermediate levels compared to these two environments. The organochlorines p, p′-DDE and p, p′-DDE methyl sulphone were tested for effects on reproduction and mortality during two weeks, and it was found that p, p′-DDE was the most toxic. It is concluded from the investigation that N. spinipes is a suitable toxicity test organism in brackish water.
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