Yellowstone National Park Report
Yellowstone National Park initiated a grayling restoration program in 1971, to re-establish grayling in small headwater systems of the Missouri River in YNP. Comparative genetic analysis of arctic and Montana grayling was initiated to identify pure populations of Montana grayling as a source of eggs or fry. The initial stocking attempt utilizing grayling derived from a laustrine population (Grebe Lake in YNP) was unsuccessful because the grayling failed to hold stream position and drifted downstream into the Missouri River. A second stocking attempt with fish from the Bighole River in Montana was apparently successful. A comparative genetic analysis of lacustrine and adfluvial populations was started in 1977.
Vyse, E. R. and Gould, W. R.
"Comparison of Genetic and Meristic Characters of Yellowstone National Park, Montana and Arctic Grayling Populations ,"
University of Wyoming National Park Service Research Center Annual Report: Vol. 2
, Article 29.
Available at: https://repository.uwyo.edu/uwnpsrc_reports/vol2/iss1/29