Test No. 229
Subtitle: Fish Short Term Reproduction Assay
By: Organisation for Economic Co-operation and Development
Series: OECD Guidelines for the Testing of Chemicals, Section 2
Publisher: OECD Publishing
Published: 2009
Place of publication: Paris
Language: eng
Format: [electronic resource] /
Number of pages: 40
ISBN-13: 9789264076211
Subjects: Ecology; Euthenics; Nature and nurture; Adaptation (Biology)
Description: This Test Guideline describes an in vivo screening assay for fish reproduction where sexually mature male and spawning female fish are held together and exposed to a chemical during a limited part of their life-cycle (21 days). The short term reproduction assay was validated in the fathead minnow (Pimephales promelas) and this is the recommended species. The assay is run with three test chemical concentrations and the necessary controls, including a carrier control if necessary. For the fathead minnow, four replicate test vessels are used for each treatment level and control(s). During the conduct of the assay, the egg production is measured quantitatively daily in each test vessel. At termination of the 21-day exposure period, two biomarker endpoints are measured in males and females separately, as indicators of endocrine activity of the test chemical; these endpoints are vitellogenin and secondary sexual characteristics. Gonads of both sexes are also preserved and histopathology may be evaluated to assess the reproductive fitness of the test animals and to add to the weight of evidence of other endpoints.