The use of the physiological energetics of Gammarus pulex to assess toxicity: A study using artificial streams

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Abstract
A sublethal assay based on the energy budget of the freshwater amphipod Gammarus pulex has been developed. Gammarus “scope for growth” can be used both as a laboratory test and as an in situ bioassay. This paper provides a short review of the technique and investigates a way in which it may be simplified for field deployment. The usefulness of this modified technique for determining the toxicity of an organic compound and its relative sensitivity compared to other measures of toxicity was investigated by using an artificial stream system.