Habitat selection, foraging behavior, and forage intake rates by caribou were studied on a calving ground in northwestern Alaska. The pattern of emergence of new plant growth determined habitat use. The grazing pattern reflected a balance between selection for nutrients and plant biomass, and avoidance of plant secondary metabolites. Habitat use was also influenced by predator avoidance. At the time of calving, meteorological conditions provide a snow-free "window" of available Eriophorum vaginatum inflorescences that are of high nutritive value. Subsequently, topographic variation results in a diversity of forbs and shrubs confined in time and space at the time of peak nutritional demands for lactation and growth of calves during June. Intake of deciduous shrub leaves averaged 3.7 g/min and the intake of E. vaginatum inflorescences was 1.1 g/min. Highest observed intake was 5.5 g/min on forbs. Forage selected was of high nutritive value and high digestibility. Thus, caribou selected productive microsites and habitats where intake of preferred forage could be maximized.
Thesis (M.S.) University of Alaska Fairbanks, 1984
The export option will allow you to export the current search results of the entered query to a file. Different
formats are available for download. To export the items, click on the button corresponding with the preferred download format.
By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.
To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export.
The amount of items that can be exported at once is similarly restricted as the full export.
After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.