Fish, Early-Life Stage Toxicity Test (OECD TG 210)
The Fish Early-Life Stage Toxicity Test according to OECD TG 210 is designed to evaluate the chronic effects of substances on the early developmental stages of fish. This test provides critical information on the potential long-term impact of chemicals on fish populations and aquatic ecosystems.
In this study, fertilized fish eggs are exposed to a range of concentrations of the test substance under controlled laboratory conditions. The exposure typically continues through embryonic development, hatching, and early larval growth stages, often lasting several weeks depending on the species.
Key endpoints assessed include hatching success, survival, growth (e.g. length and weight), and the occurrence of developmental abnormalities. These parameters are used to establish concentration–response relationships and to determine endpoints such as the No Observed Effect Concentration (NOEC) or the Lowest Observed Effect Concentration (LOEC).
This test is essential for understanding the chronic toxicity of substances and their potential effects on fish recruitment and population sustainability, thereby supporting comprehensive environmental risk assessments.
