Fly Fishing Welfare: The Ethics of Catch-and-Release for Trout and Salmon

Fly fishing is often seen as a natural, low-impact sport, but the welfare implications of catch-and-release fishing for trout and salmon deserve honest examination.

Key Facts

Fly fishing for trout and salmon is practiced by millions worldwide and generates significant economic value in rural areas
Catch-and-release practices are common in fly fishing, with fish returned after capture
Research shows cortisol levels in caught-and-released trout remain elevated for up to six hours post-release
Fly-caught fish show higher survival rates than those caught on bait, partly due to less deep-hooking
Hot water conditions in summer significantly reduce post-release survival in salmonids

Welfare Considerations

Fly fishing welfare depends primarily on angler technique and environmental conditions. The fight on a fly rod causes lactic acid build-up in muscles and cortisol elevation that can impair immune function and reproductive success. Prolonged fights on light tackle cause greater physiological harm than quickly landed fish. Air exposure during photography causes respiratory stress. Warm summer water — now increasingly common with climate change — dramatically reduces recovery capacity after the physiological stress of capture.

What You Can Do

Land fish quickly using appropriate tackle to minimise lactic acid build-up
Keep fish in the water during unhooking and eliminate photography in warm water conditions
Check water temperatures before fishing — consider stopping when temperatures exceed welfare thresholds
Use barbless flies to simplify unhooking and reduce handling time