Indicator 2.4.19

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System

Water Type

Feed Dependent

Species

Indicator 2.4.19

by Contact on 8 October 2026

Requirement

The UoC shall conduct, in collaboration with the local fishery trust(s), a scientific baseline study to determine the genetic composition of the contemporary native and farmed salmonid population(s) in the waterbody where it operates. The baseline study shall: a. use credible methodologies and analysis and undergo peer review; and b. include known historical farmed and native salmonid genetic profiles; and c. determine if changes in the genetic composition of the contemporary native salmonid population(s) have occurred; and d. if changes in the genetic composition of the contemporary native salmonid population(s) are detected, seek to determine if these have occurred through introgression of farmed salmon or through other mechanisms; and e. be updated every three years.

How Do I Interpret This Requirement?

  • This Indicator requires the UoC to conduct a collaborative scientific baseline study on the genetic composition of both native and farmed salmonid populations in the waterbody where it operates.

    • The goal is to assess potential genetic changes in wild populations, particularly from interbreeding (introgression) with farmed salmon, and ensure ongoing monitoring.

  • The study should establish a genetic baseline for comparison over time and should follow rigorous scientific methods and undergo peer review for credibility.

  • The study should use established genetic analysis techniques (e.g. DNA sequencing, microsatellite markers, SNP analysis).

  • The study should, if available, include known historical genetic profiles of both native and farmed salmonid populations in the waterbody.

  • The study should determine if genetic changes have occurred in native populations and identify if this is the result from introgression from farmed fish or other evolutionary pressures.

  • The study must be updated every three years.

Evidence of Implementation

  • The UoC maintains records of the conducted study or demonstrates that the study is under development.

Auditors Should Confirm

  • Verify that the study has been concluded and has been conducted according to the requirements or is under development.