ABSTRACT. Park managers are concerned that moose (Alces alces), caribou (Rangifer tarandus), and grizzly bears (Ursus arctos) may be avoiding areas along the 130 km road through Denali National Park as a result of high traffic volume, thus decreasing opportunities for visitors to view wildlife. A wildlife monitoring system was developed in 1996 that used 19 landscape level viewsheds, stratified into four sections based on decreasing traffic along the road corridor. Data were collected from 22 samplings of all viewsheds during May-August in 1996 and 1997. In 1997, nine backcountry viewsheds were established in three different areas to determine whether density estimates for each species in the backcountry were higher than those for the same animals in similar road-corridor areas. Densities higher than those in the road corridor were found in one backcountry area for moose and in two backcountry areas for grizzly bears. None of the backcountry areas showed a higher density of caribou. We tested hypotheses that moose, caribou, and grizzly bear distributions were unrelated to the road and traffic. Moose sightings were lower than expected within 300 m of the road. More caribou and grizzly bears than expected occurred between 601 and 900 m from the road, while more moose and fewer caribou than expected occurred between 900 and 1200 m from the road. Bull moose in stratum 1 were distributed farther from the road than bulls and cows in stratum 4; cows in stratum 1 and bulls in stratum 2 were distributed farther from the road than cows in stratum 4. Grizzly bears in stratum 2 were distributed farther from the road than bears in stratum 3. The distribution of moose sightings suggests traffic avoidance, but the spatial pattern of preferred forage may have had more of an influence. Caribou and grizzly bear distributions indicated no pattern of traffic avoidance.Key words: Alaska, caribou (Rangifer tarandus), Denali, grizzly bears (Ursus arctos), moose (Alces alces), road traffic, viewsheds RÉSUMÉ. Les gérants du parc s'inquiètent du fait que l'orignal (Alces alces), le caribou (Rangifer tarandus) et le grizzli (Ursus arctos) pourraient éviter les zones bordant les 130 km de la route qui traverse le parc national Denali, en raison du volume élevé de circulation, ce qui diminue aussi pour les visiteurs les chances de voir la faune. Un système de surveillance de la faune a été mis sur pied en 1996, système qui faisait appel à 19 cabanes d'observation installées de niveau avec le paysage, réparties en quatre sections déterminées selon la décroissance de circulation le long du corridor routier. En 1996 et 1997, on a collecté les données de mai à août provenant de 22 échantillons prélevés à toutes les cabanes. En 1997, neuf cabanes d'arrière-pays ont été installées dans trois zones différentes, afin de déterminer si les estimations des densités pour chaque espèce étaient plus élevées dans l'arrière-pays que dans des zones semblables agissant comme corridors routiers. On a trouvé des densités plus élevées que celles dans le corrido...
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