Indicator 4.1.1.10.7

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Water Type

Feed Dependent

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Indicator 4.1.1.10.7

by Contact on 8 October 2026

Table 1. Requirements for Indicator 4.1.1.10.7

Indicator

Requirement

4.1.1.10.7

The UoC shall ensure the HWMP includes a mortality reduction plan which defines annual targets for both total and unexplained mortalities by considering the results of the trend analysis in Indicator 4.1.1.10.6 and shall implement appropriate actions to meet the annual targets.


How Do I Interpret This Requirement?

  • The mortality reduction programme should address the various factors contributing to fish mortality.

  • When building the programme, the UoC should consider:

    • Current mortality rates and causes, including unexplained mortality.

    • Set achievable goals and objectives.

    • Identify priority areas for intervention according to the goals and objectives.

    • Develop strategies addressing priority areas for intervention.

    • Monitor and evaluate progress regularly.

    • Provide employees with training.

    • Foster a culture of continuous improvement.

    • Collaborate with industry experts for knowledge sharing.

    • Seek health professionals’ involvement in developing the reduction plan.

  • When building the programme, the UoC should consider:

    • Special attention should be given to unexplained mortalities which may indicate underlying health issues or poor management practices

    • Identifying and addressing the root causes of unexplained mortalities is essential for improving overall management practices and reducing mortality rates.

    • In addition, consistent, clear downward trends in OWIs indicate declining health or welfare.

    • Examples of such trends include a consistent increase in overall morphological scoring, repeated observations of abnormal behaviour, deteriorating water quality with one or more parameters that are outside of the acceptable ranges, or increasing mortality.

    • If a declining trend is observed, then the UoC should assess the situation and investigate the causes behind the trends.

    • One or multiple issues may be causing the decline, including those of infectious or non-infectious origin.

    • In many cases, poor or inadequate husbandry practices can predispose animals to succumb to infectious diseases.

  • Also, when declining trends are observed, the UoC is expected to review at least the following husbandry practices if appropriate:

    • Stocking densities.

    • The feeding plan.

    • Water quality.

    • Handling practices.

    • Enclosure characteristics.

    • Environmental enrichment.

  • The rearing environment, for example:

    • Additional aeration.

    • Deployment of environmental enrichment (EE), (e.g. bubble curtains, change of tank colouration, adjustments in the light system), amongst others.

Evidence of Implementation

  • Mortality reduction programme.

  • Long-term animal health and welfare improvement measures as well as short-term mitigation measures to react to situations of declining health or welfare, included in the HWMP.

  • Mortality records that allow for trend analysis for the development of a mortality reduction programme.

  • Records of long-term animal health and welfare improvement measures and short-term mitigation measures to react to situations of declining health or welfare.

Auditors Should Confirm

  • The mortality reduction programme and the improvement and mitigation measures included in the HWMP incorporate the minimum required elements and that its outcome is implemented:

    • Implementation can be verified by cross-checking the programme and measures with relevant records, information from employee interviews and observations.

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