Portland State University. Department of Biology
Date of Publication
Master of Science (M.S.) in Biology
1 online resource (13 leaves, maps, 28 cm.)
Pikas from four colonies in the Cascade Mountains of Oregon were examined. Two colonies were chosen from within the geographical distribution of two nominal subspecies. A discriminate analysis of morphological measurements taken from the specimens showed that each colony could be distinguished from each other. Each colony studied showed more intra-colony similarity than inter-colony similarity regardless of distance separating the colonies or subspecies designations. The results indicate that the validity of subspecies designations for this species can be questioned.
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Coots, Richard M., "A taxonomic study of two nominal subspecies of pikas (Ochotona princeps) in the Cascade Mountains of Oregon" (1972). Dissertations and Theses. Paper 1117.