HUSBANDRY
Bioindicator Stress Signal (BSS)
Health signal from sentinel invertebrates that react to contamination before instruments do — the cheapest, most honest sensor in the building.
Threshold Bands
| Band | Range | State |
|---|---|---|
| Calm | 0–1 | OK |
| Stressed | 1–2 | WARN |
| Alarm | > 2 | CRIT |
Formula
Composite of shrimp breeding rate, horseshoe-crab haemocyte panels, and mortality.