Centre for Aquaculture Progress
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Rainbow Trout Operational Welfare Indicator (OWI) Protocol: Ongrowing, Seawater
Context
Executive summary Stakeholder feedback Introduction Defining fish welfare and Operational Welfare Indicators (OWIs) Limitations Evidence quality Method Scoring Further guidance on assessing OWIs Appendix: OWI selection
Individual-based indicators
Vertebral deformity Body condition Scale loss Skin hemorrhaging Wounds Change of coloration Snout damage Jaw deformity Eye opacity Eye injury Operculum damage Gill damage Fin damage Sea lice
Group-based indicators
Mortality Aberrant behavior Aggressive behavior Feeding behavior Swimming behavior
Environmental indicators
Stocking density Dissolved oxygen Temperature Carbon dioxide pH Turbidity Total suspended solids Ammonia Nitrite Nitrate Metals Water velocity Salinity Hydrogen sulfide

Environmental indicators

Indicators relating to the water quality and environmental conditions of the farm.

Indicators
  1. Stocking density
  2. Dissolved oxygen
  3. Temperature
  4. Carbon dioxide
  5. pH
  6. Turbidity
  7. Total suspended solids
  8. Ammonia
  9. Nitrite
  10. Nitrate
  11. Metals
  12. Water velocity
  13. Salinity
  14. Hydrogen sulfide