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Nutritional Quality of Willows for Moose: Effects of Twig Age and Diameter 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 « 1 2 3