Click the link to read the article on The Denver Post website (Elise Schmelzer). Here’s an excerpt:
For decades, Dillon Reservoir has been a place where anglers could hook the fish of a lifetime — a 10-pound, 30-inch wild brown trout. But the brown trout population in one of Colorado’s most visible and accessible mountain reservoirs has declined in recent years, prompting state wildlife officials to consider stricter fishing regulations on the reservoir and seasonal closures on nearby waters. It’s unclear exactly what is causing the decline, said Jon Ewert, an aquatic biologist at Colorado Parks and Wildlife. But increased fishing during the pandemic, and after, may be a factor…
Other potential causes include a change in water quality, development along the rivers and streams where the trout spawn, and stress from higher water temperatures caused by drought, Ewert said…
The number of brown trout measuring more than 14 inches long has declined for four consecutive testing years, according to population surveys conducted by Colorado Parks and Wildlife. The agency conducts surveys every two years. In 2014, trout larger than that size made up 62% of all brown trout caught in the survey nets. By 2022, they made up only 33%…The brown trout in the Blue River upstream from the reservoir also have experienced an “obvious and significant decline,” according to a 2019 CPW report…
The proposed rules would require anglers to immediately release brown trout that are longer than 14 inches, with the rule applying to the reservoir, to sections of the Blue River south of the reservoir and to Tenmile Creek. Fishing would be banned entirely from Sept. 1 to Dec. 1 in two places where the trout spawn in the fall: the Blue River between the reservoir and three miles north of Breckenridge, and West Tenmile Creek from Copper Mountain to the reservoir.
