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Monthly Archives

December 2021

Survey of the Lower Big Lost River 2021

By Conservation

Big Lost River Tailwater: Fish Population Estimates

In early April of this year, we conducted our seventh population estimate to survey the fish populations in the tailwater of the Big Lost River, where we caught 1,012 Rainbow Trout in the survey.  We are most interested in gathering data on the Rainbow Trout and Mountain Whitefish populations in this portion of the river.  Referring to the figure below, abundances of both species are increasing compared to our last surveys conducted in 2018.  Rainbow Trout abundance has increased 26% and Mountain Whitefish abundance has increased 57%.

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