Filters: Contacts: Barboza, Perry S. (X) > Types: Downloadable (X) > partyWithName: Adams, Layne G. (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (2) Shapefile (2) Types Citation (2) Map Service (2) OGC WFS Layer (2) OGC WMS Layer (2) Shapefile (2) Contacts Barboza, Perry S. Gustine, David D. Arthur, Steve M. Farnell, Richard G. Lawler, James P. More... Categories Data (2) Publication (2) View Results as: JSON ATOM CSV

An isotopic approach to measuring nitrogen balance in caribou Nutritional restrictions in winter may reduce the availability of protein for reproduction and survival in northern ungulates. We refined a technique that uses recently voided excreta on snow to assess protein status in wild caribou (Rangifer tarandus) in late winter. Our study was the first application of this non-invasive, isotopic approach to assess protein status of wild caribou by determining dietary and endogenous contributions of nitrogen (N) to urinary urea. We used isotopic ratios of N (?15N) in urine and fecal samples to estimate the proportion of urea N derived from body N (p-UN) in pregnant, adult females of the Chisana Herd, a small population that ranged across the Alaska-Yukon border. We took advantage... Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Baseline 5-Data, Caribou, Chisana Herd, Mammals, Monitoring 1-Changes in Plant and Animal Distribution: Fauna, All tags... Species of Concern: Mammals, Fewer tags Diversity of nitrogen isotopes and protein status in caribou: implications for monitoring northern ungulates Categories: Data, Publication; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Baseline 5-Data, Caribou, Species of Concern: Mammals