HUSBANDRY
Disease Incidence Rate (DIR)
Rate of new disease cases across held stock. The headline welfare alarm of the Marine Health program; a sustained rise triggers a water-quality review before a treatment.
Threshold Bands
| Band | Range | State |
|---|---|---|
| Quiet | < 1% | OK |
| Active | 1–4% | WARN |
| Outbreak | > 4% | CRIT |
Formula
New clinical cases ÷ stock at risk, per week.