These projects were supported by the U. S. Fish and Wildlife Service, U. S.
National Biological Service, the U. S. D. A. North Central Forest Experiment
Station, the U. S. National Park Service, and the International Wolf Center.
For the Ellesmere work, the logistical support of the Polar Continental Shelf
Project, Atmospheric Environment Services, and High Arctic International are
also greatly appreciated. The help of several field assistants and of International
Wolf Center observers is also gratefully acknowledged. C. S. Asa and T. J. Meier
suggested improvements to the manuscript.
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