Graduate Thesis Or Dissertation
 

Pellet counts as a census and range-use technique for Columbia black-tailed deer

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mw22vb32j

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  • Rates of defecation of black-tailed deer in the Tillamook Burn of western Oregon were estimated using counts of groups of fecal pellets in 1959 and 1960. A 340-acre enclosure was divided into eight range types on the basis of depth of soil, aspect, and elevation. The estimated rates of defecation were used to calculate the density of deer for each range type. A total of 285 plots, each 100 square feet in area, were cleared and checked in March-April 1959, May- August 1959, and February-March 1960. Calculated rates of defecation varied from 22.0 to 23.9 groups of pellets per day which were substantially higher than rates previously reported. Accuracy of finding groups of fecal pellets varied with seasonal changes in vegetative cover with the most accurate counts occurring during the winter and early spring. The density calculations indicated the deer preferred southeast facing slopes and areas of deep soil.
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