. The bison of Yellowstone National Park. American bison; Mammals. Fig. 36. Neckbanded bison in a group at Pocket Basin on the Firehole. Photo by John Douglass, Yellowstone National /935 /940 /945 /9S0 II I I 1 I Fig. 37. Population fluctuations in win- tering areas caused by shifts of mixed herd groups. coincided with increases in Pelican in 1937, 1941, and 1942; decreases in Pelican winter numbers coin- cided with increases in Lamar in 1940, 1943, and 1949. Reductions, made only in Lamar during this period, probably added to the amount of decrease there in 1941 and 1942, but could not
. The bison of Yellowstone National Park. American bison; Mammals. Fig. 36. Neckbanded bison in a group at Pocket Basin on the Firehole. Photo by John Douglass, Yellowstone National /935 /940 /945 /9S0 II I I 1 I Fig. 37. Population fluctuations in win- tering areas caused by shifts of mixed herd groups. coincided with increases in Pelican in 1937, 1941, and 1942; decreases in Pelican winter numbers coin- cided with increases in Lamar in 1940, 1943, and 1949. Reductions, made only in Lamar during this period, probably added to the amount of decrease there in 1941 and 1942, but could not have in- fluenced the 1937 decrease nor any Pelican decreases. Bias in Peli- can population counts made by rangers on winter ski trips might account for some variation, but not the coincidence of changes in population numbers in the two valleys. Mixed herd groups which moved between Lamar and Peli- can in late fall and early winter probably remained on the winter range that was in use when weath- er conditions worsened. Shifts between Pelican and Hayden Valley were infrequent. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Meagher, Margaret Mary; United States. National Park Service. [Washington] : U. S. Dept. of the Interior, National Park Service
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Keywords: ., bookauthorunitedstatesnatio, bookcentury1900, booksubjectmammals
