Filters: Contacts: Barboza, Perry S. (X) > Types: Map Service (X)
8 results (10ms)
Filters
Date Range
Extensions Types Contacts Categories |
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,
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Caribou,
Species of Concern: Mammals
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Moose,
Species of Concern: Mammals
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Caribou,
Species of Concern: Mammals,
Woodland Herd
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: B5-Caribou,
M1-Changes in Plant and Animal Distributon
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Mammals,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna
Alaskan moose (Alces alces gigas) consume willow (Salix spp.) as a fundamental component of their winter diet. We collected Barclay willow (S. barclayi) from 5 nearby sites (15–80 m apart) on the Kenai Peninsula, Alaska, USA, during winter 1999–2000. We tested effects of diameter and age of twigs on nutritional quality of willows for moose. Smaller-diameter twigs had higher in vitro dry matter digestibility (IVDMD), and protein content, but lower fiber content (P < 0.001) than larger twigs. An inverse relationship occurred between the age of twigs and protein content (P < 0.001), with older-aged twigs containing less protein. Accordingly, age of twigs was negatively related to fiber content (P = 0.002). Conversely,...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Monitoring 1-Changes in Plant and Animal Distribution: Flora,
Moose,
Species of Concern: Mammals
|
![]() |