Editor’s Note: Today, our fishing expert Frank Sargeant answers a question that has confused many of us who aren’t familiar with fishing in the West: What the heck are hoot owl restrictions?
If you’re a southern bass and panfish angler, it’s safe to say you’ve never heard of “hoot owl” restrictions on fishing. But for western trout anglers, they’re currently a bone of contention in some waters.
While a lot of conservationists would disagree, the Idaho Department of Game and Fish (IDFG) just released a study that says “hoot owl” restrictions on summer trout fishing—that is, closing down fishing on many streams when water temperature rises during the hottest part of the day—do not protect a significant number of trout during the hot months, at least in some Idaho waters.
The idea of hoot owl restrictions is that trout caught between 2 p.m. and midnight are stressed and then plunged back into water that is already stressing them simply by being too warm and too low in oxygen. Many fish released in the warmer water don’t make it.
Trout do best at temperatures from 70 F down. Brook trout are the most delicate of trout species, thriving only in water from 44 to 64 degrees. Rainbows and browns do best at temperatures from 44 to 67, but still do some feeding up to 73. After that, it’s survival mode.
While the study indicated, as expected, that more trout caught when water temperature above 73 degrees F died after release, it also indicated that anglers were able to catch a lot fewer trout when the water temperature was 73 or higher—the fish simply quit feeding.
In colder water, the mortality of tagged and released fish was lower, but anglers caught a lot more fish, so the overall mortality was higher.
Idaho’s Department of Fish and Game says trout fishing in the heat of summer results in fewer hookups and fewer fish stressed by catch and release, so is probably not a source of high fish mortality. Many conservationists disagree. Idaho DFG photo, with permission.
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