Fish Early Life Stage Toxicity (OECD 210)

Freshwater Fish - Early Life Stage Toxicity (FELST) - OECD 210

The preferred freshwater species are rainbow trout (Oncorhynchus mykiss) or carp (Cyprinus carpio).

The early life stages of fish are exposed to the chemical usually under flow-through conditions. The study starts by placing fertilised eggs in a series of replicate test chambers and continues until all the fish are free-swimming and feeding exogenously. Lethal and sub-lethal effects such as growth and development are assessed and compared with un-exposed control replicates. The larval and early fry stages are usually the most sensitive stages to the effects of xenobiotics.


Assessment of the toxic effects of your product on early life stage fish in the freshwater environment.

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