CASPER, Wyo. — It’s no secret July is the hottest month of the year, and that extends to Wyoming’s many waterbodies as well. Given trout’s difficulty surviving in warm and oxygen-deprived water, the Wyoming Game and Fish Department is advising that anglers be more careful catching trout in this warmer weather.
“Warmer surface temperatures have the potential to be lethal to trout,” Alan Osterland, Wyoming Game and Fish’s Fish Division chief, said. “Warm water also holds less oxygen, which can stress not only trout, but also all fish.”
According to Game and Fish, trout enduring prolonged exposure to 75-plus-degree water are very likely to die. Water warmer than 80 degrees could kill a trout within minutes. Even if a trout can persist in warm water long enough to be caught, the department warns the stress associated with being caught on top of environmental stressors will significantly reduce its chances of survival.
With this in mind, the department is requesting anglers adjust their fishing habits in these warmer months.
“As water temperatures increase, anglers should monitor water temps while fishing. When water temperatures hit 70 degrees, we recommend anglers stop catching and releasing fish,” Osterland said. “Practice self-restraint to help fish survive.”
The department also included a bulleted list describing best practices for the ethical treatment of fish in higher-temperature waters. The department’s list — consisting of recommendations, not new regulations — is as follows:
- Fish early in the morning while the water temperature is cooler.
- Carry a pocket thermometer to monitor the water temperature.
- If the water temperature is at or above 65 degrees, consider keeping what you catch within the regulations. If the temperature is 70 degrees or higher, do not attempt to catch and release fish.
- Play and land fish as rapidly as possible to reduce exhaustion stress.
- Keep the fish in the water as much as possible.
- Do not squeeze the fish or place fingers in the gills.
- Remove the hook gently. If hooked deeply, cut the leader.
- Flies and lures are recommended whenever many fish are being caught and released.
- Barbless hooks allow easier hook removal.
- If a fish is exhausted and cannot hold itself upright, and if regulations allow, consider having it for supper because the fish has a poor chance of surviving.
