Catch and Release Trout Welfare | Animal Welfare Hub

Species-specific welfare considerations for catch and release fishing of trout in rivers and stillwaters.

Key Facts

Trout are among the most extensively studied fish for pain and stress responses in catch and release research
Air exposure is the single most important welfare-determining factor in trout catch and release survival
Trout released with under 30 seconds air exposure have significantly higher survival rates than those held longer
Water temperature above 18 degrees C substantially increases post-release trout mortality
Barbless hooks reduce lip injury and enable faster, less disruptive hook removal
Trout released head-first into current recover oxygen balance faster than those released passively

Welfare Considerations

Trout catch and release is one of the most evidence-rich areas of fish welfare in recreational fishing. Research has clearly established the key welfare-determining factors: air exposure duration, water temperature, and hook type are the three variables that most strongly predict whether a released trout survives. Anglers who genuinely care about trout welfare have specific, practical actions available to them. The evidence is sufficient to support arguing that catch and release fishing in warm water conditions above 18 degrees C is inconsistent with welfare responsibility, and that rivers should implement voluntary or mandatory stop-fishing thresholds at these temperatures.

What You Can Do

Keep trout in the water at all times when possible — remove the hook without lifting the fish out
If handling is necessary, limit air exposure to under 15 seconds and keep hands wet
Avoid catch and release fishing when water temperature exceeds 18 degrees C
Use barbless hooks to reduce injury and enable rapid, gentle hook removal
Support angling organizations that implement temperature-based fishing restrictions as welfare guidelines