Source Texts
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Text 1
As part of a study of ungulates (hoofed mammals) native to the Yellowstone River basin, fresh dung samples from identified individuals were collected in the Confederated Salish and Kootenai Tribes Bison Range of Montana. Based on steroidal analysis, on average the bison and elk samples had similar levels of beta-sitosterol and stigmastanol, which distinguished these species' profiles from that of moose.
Text 2
Although fecal-steroidal profile alone is not sufficient to distinguish between samples from bison and those from elk, the relative levels of zoostanols (steroids with animal origins), such as coprostanol and 24-ethyl-coprostanol, in sediments at Buffalo Ford Lake in Yellowstone National Park show that bison, elk, or both were the predominant ungulates in the lake's watershed for all strata of sediment examined, going as far back as 2,300 years.
As part of a study of ungulates (hoofed mammals) native to the Yellowstone River basin, fresh dung samples from identified individuals were collected in the Confederated Salish and Kootenai Tribes Bison Range of Montana. Based on steroidal analysis, on average the bison and elk samples had similar levels of beta-sitosterol and stigmastanol, which distinguished these species' profiles from that of moose.
Text 2
Although fecal-steroidal profile alone is not sufficient to distinguish between samples from bison and those from elk, the relative levels of zoostanols (steroids with animal origins), such as coprostanol and 24-ethyl-coprostanol, in sediments at Buffalo Ford Lake in Yellowstone National Park show that bison, elk, or both were the predominant ungulates in the lake's watershed for all strata of sediment examined, going as far back as 2,300 years.