Movement parameters, mean estimates, standard deviations (SD), and 95% confidence intervals (CI) and their mean annual start and end dates of seasons classified by caribou movement characteristics estimated for fall and spring migrations of the Central Arctic caribou herd in northern Alaska, 2003–2007.

<p>Sample sizes were the numbers of migration routes of individual caribou modeled during each season (88 and 106 for fall and spring, respectively). Summer extended from the end of calving to the beginning of fall migration; winter extended from the end of fall migration to the beginning of spring migration.