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Daily heterogeneity in habitat selection by the Porcupine Caribou Herd during calving

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dc.contributor.author Jones, Rachel Rands
dc.date.accessioned 2015-09-02T01:29:09Z
dc.date.available 2015-09-02T01:29:09Z
dc.date.issued 2005-08
dc.identifier.uri http://hdl.handle.net/11122/5912
dc.description Thesis (M.S.) University of Alaska Fairbanks, 2005 en_US
dc.description.abstract Caribou exhibit scale-dependent habitat selection, but variance in daily habitat selection by the Porcupine Caribou Herd (PCH) has not been examined. Investigating temporal variance in habitat selection may clarify the time period when managers may accurately estimate calving-related habitat selection. Annually, 1992-1994, approximately 70 calves were radio-collared within 2 days of birth and relocated daily until departing the calving grounds. We used daily 99% fixed kernel utilization distributions (UD's) to estimate caribou distributions, then estimated daily habitat selection using logistic regression. Habitat variables included relative vegetation greenness, greening rate, landcover class, and elevation. Spatial scales of investigation included concentrated vs. peripheral use within daily UD's, daily use within the merged extent of all daily UD's, and daily use within the historical extent of calving, 1983-2001. We used linear regression of logistic regression parameter estimates on sequential sampling days to estimate temporal habitat selection trends during the 3 weeks following capture. Overall, caribou exhibited habitat selection at multiple scales, without temporal trends, suggesting that the 21-day period following capture constituted a single domain and that managers may accurately estimate calving-related habitat selection at any point during this period. en_US
dc.language.iso en_US en_US
dc.title Daily heterogeneity in habitat selection by the Porcupine Caribou Herd during calving en_US
dc.type Thesis en_US
dc.type.degree ms en_US
dc.identifier.department Biology and Wildlife Department en_US


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