Overview
ISO 23893-3:2013 is an international standard published by the International Organization for Standardization (ISO) that specifies a validated method for the determination of vitellogenin (Vtg) concentrations in fish blood plasma. This method uses the enzyme-linked immunosorbent assay (ELISA) technique and is applicable to a broad range of environmental monitoring and laboratory-based studies. The standard supports the assessment of water quality by providing a reliable biochemical indicator for the exposure to and effects of estrogenic substances on fish populations. It applies to fish from freshwater, estuarine, and marine environments, as well as to those exposed to environmental contaminants in controlled conditions.
Key Topics
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Vitellogenin as a Biomarker
Vitellogenin is a precursor to egg yolk proteins, produced in the liver of fish in response to estrogenic signals. Elevated Vtg levels in male or juvenile fish are a recognized indication of exposure to endocrine-disrupting compounds in aquatic environments.
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ELISA Methodology
The standard outlines both sandwich and competitive ELISA procedures for the sensitive and specific quantification of vitellogenin concentrations in fish plasma. The usage of species-specific antibodies and highly characterized Vtg standards is emphasized to ensure quantitative and accurate results for the fish species under investigation.
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Sampling Procedures
Detailed instructions are provided for sampling fish and blood plasma in both field and laboratory contexts. The protocol ensures the correct handling, immediate processing, and appropriate storage of samples to preserve Vtg stability and the integrity of results.
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Quality Control and Reporting
The document defines minimum performance criteria, including selectivity, calibration, and recovery benchmarks. It also offers robust guidelines for documentation, requiring comprehensive test reports that include all key parameters from sampling conditions to data analysis.
Applications
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Environmental Monitoring
ISO 23893-3:2013 is widely used by environmental agencies and research institutions for monitoring the presence of estrogenic and antiestrogenic compounds in water bodies. Elevated vitellogenin levels provide evidence of exposure to endocrine-disrupting chemicals, aiding in the assessment of ecosystem health and regulatory compliance.
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Ecotoxicology and Risk Assessment
The standard supports laboratory-based toxicity studies, enabling researchers to measure the impact of specific effluents or chemicals on fish reproduction and development. It serves as a powerful tool in regulatory ecotoxicology for evaluating the safety of substances under international water quality frameworks.
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Biomonitoring Programs
Governmental and industrial stakeholders leverage this standardized method in long-term biomonitoring programs to detect changes in water quality over time and to assess the effectiveness of pollution mitigation measures.
Related Standards
- ISO 23893-1: Water quality - Biochemical and physiological measurements on fish - Part 1: Sampling of fish, handling, and preservation of samples.
- ISO 23893-2: Water quality - Biochemical and physiological measurements on fish - Part 2: Determination of ethoxyresorufin-O-deethylase (EROD) [Technical Specification].
ISO 23893-3:2013 is part of a series dedicated to biochemical and physiological measurements in fish for comprehensive water quality assessments. Together, these standards enable laboratories and monitoring agencies to apply harmonized protocols, facilitating comparable and high-quality data across studies and regions.
By implementing ISO 23893-3:2013, organizations ensure the reliability and reproducibility of vitellogenin measurements, supporting robust assessment of water quality and endocrine disruption in aquatic ecosystems. This helps protect biodiversity and inform risk management decisions for environmental stewardship.
Open preview (PDF)Water quality — Biochemical and physiological measurements on fish — Part 3: Determination of vitellogenin
