Catch a 20-Inch Rainbow, and Help with CPW Study

Interested in catching a 20-inch rainbow trout? Thought so.

Colorado Parks and Wildlife is asking for help from anglers to learn about the “catchability” of different strains of rainbow trout that are stocked in reservoirs. Aquatic biologists have stocked Pastorius Reservoir with 800 of a new strain of rainbow trout as part of a special project. To increase angler interest and participation in the project, CPW is also stocking 100 rainbow trout “broodstock” which are in the 16-20-plus inch range.

Photo courtesy Colorado Parks & Wildlife.

To determine how the fish respond to bait, lures and flies, CPW has “marked” the 800 fish by clipping the small adipose fin that is located on the backs of the fish. Starting March 29 anglers at Pastorius are being asked to record the number of fish they catch that are marked (no adipose fin) and unmarked (adipose fin present) and to answer a five-question on-line survey. The survey is expected to run about two weeks. Clipping the fin causes no harm to the fish.

CPW has posted signs at the reservoir with a QR code and web link anglers can use to access the survey with their smartphones as soon as they get done fishing for the day. Anglers are asked to record their catch, including fish they released, after each day of fishing. Those fishing can take the survey more than once. The survey should only take a couple of minutes to complete. A CPW volunteer will also be at the reservoir to answer questions.

“We rely on anglers to help us manage fisheries,” said Jim White, CPW’s aquatic biologist in Durango. “This information will be valuable for our hatchery and stocking programs. Plus, we’re giving folks a chance to land some big fish.”

The cell phone service at Pastorious Reservoir is good, so anglers with cell phones can record information on the spot. The survey can also be completed at home. No personal information will be collected through the survey.

The daily bag limit at Pastorius Reservoir is four trout, and the possession limit is eight. The reservoir is located south of Durango on La Plata County Road 304

Anglers are reminded that they need a new fishing license for the year starting April 1.

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