| Summary: | S1 Table. Sample size of movement data per analysis-year for the Teshekpuk Caribou Herd in northwestern Alaska. Analysis-years begin 1 July of the indicated year and continue through 30 June of the following year. All caribou had their GPS collars replaced with Platform Terminal Transmitter (PTT) collars in 2005, resulting in a lack of GPS records for the 2005 analysis-year. S2 Table. Timing of fall migration for the Teshekpuk Caribou Herd. Start date, end date, and duration of migration are reported at three scales: Overall, by coarse wintering area, and by fine wintering area. Values with different superscript letters had statistically significant (p < 0.05) differences in timing. Comparisons were only done within each timing metric and scale, not between metrics or scales. S3 Table. Timing of spring migration for the Teshekpuk Caribou Herd. Start date, end date, and duration of migration are reported at three scales: Overall, by coarse wintering area, and by fine wintering area. Values with different superscript letters had statistically significant (p < 0.05) differences in timing. Comparisons were only done within each timing metric and scale, not between metrics or scales. S4 Table. Path distances (km) for Teshekpuk Caribou Herd fall and spring migration. Path distance was calculated for caribou-years classified as “migration” (n = 129) by summing the distances between consecutive locations during an individual’s migration period (as determined by the first passage time–net squared displacement method) on datasets standardized to have at most two locations per day. Patterns were similar for Euclidean distance ( S2 Appendix : S5 Table). Distances are reported at three scales: Overall, by coarse wintering area, and by fine wintering area. Values with different superscript letters had statistically significant (p < 0.05) differences in migration distance. Comparisons were only done within each season and scale, not between scales. S5 Table. Euclidean distances (km) for Teshekpuk Caribou Herd fall and spring migration. Values report the Euclidean distance between individual migration start and end locations (as determined by the first passage time–net squared displacement method), using datasets standardized to have at most two locations per day, for caribou-years classified as “migration” (n = 129). Distances are reported at three scales: Overall, by coarse wintering area, and by fine wintering area. Values with different superscript letters had statistically significant (p < 0.05) differences in migration distance. Comparisons were only done within each season and scale, not between scales. S1 Fig. Percentage of caribou classified as migrants in each analysis-year by the first passage time–net squared displacement (FPT-NSD) analysis. Analysis-years begin 1 July of the indicated year and continue through 30 June of the following year. Confidence intervals were calculated using the Wilson method from the binom R package. S2 Fig. Duration of fall and spring migration for the Teshekpuk Caribou Herd. Across all migrants (n = 129), fall migration tended to take longer than spring migration (p < 0.001). S3 Fig. Migration path distance (km) by season. Data shown combined for all caribou-years (top row), divided at a coarse scale–coastal plain versus Brooks Range (second row), and divided at a fine scale–four wintering areas (bottom two rows). Path distance was calculated for caribou-years classified as “migration” (n = 129) by summing the distances between consecutive locations during an individual’s migration period (as determined by the first passage time–net squared displacement method) on datasets standardized to have at most two locations per day. See S2 Appendix : S4 Fig for results using Euclidean distance of migration. S4 Fig. Euclidean distance of migration (km) by season. Data shown combined for all caribou-years (top row), divided at a coarse scale–coastal plain versus Brooks Range (second row), and divided at a fine scale–four wintering areas (bottom two rows). Data are depicted for caribou-years classified as “migration” (n = 129) by the first passage time–net squared displacement method. See S2 Appendix : S3 Fig for path distance of migration. S5 Fig. Winter population-level utilization distribution for the Teshekpuk Caribou Herd. We used the 50% contours (solid black lines) to distinguish wintering areas in the high-density coastal plain region and 85% contours (dashed black lines) in the lower density Brooks Range region. See Fig 1 for a depiction of final wintering areas. (PDF)
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