Distribution and Movements of Moose (<i>Alces alces</i>) in Relation to the Trans-Alaska Oil Pipeline

Abstract

During late winter 1982 and 1983, the distribution and movements of moose adjacent to the Trans-Alaska near Big Delta, Alaska, were examined. Within a 15 km wide corridor centered on the pipeline, moose distribution was independent of the distance from the pipeline. Of 175 moose trails examined, most (94%) crossed the pipeline successfully upon entering the right-of-way regardless of pipe mode or pipe height above ground. Pipe heights above 1.5 m were adequate for moose passage, but greater heights up to 2.7 m were preferred. Sections of pipe that were buried or that were specially elevated to facilitate moose passage did not receive preferential use. Moose moved in a meandering fashion whether they were crossing the pipeline or moving within habitats in distant areas. The results of this study supported the hypothesis that the distribution and local movements of moose were not significantly affected by the pipeline.

Key words: moose (Alces alces), movements, pipeline, crossing success, habitat use, effects of development